> ? Which of the following .NET components can be used to remove unused references from the managed heap? The reduction in off flavour of beer is practiced through. How to use Hall Effect Sensor with Arduino? These cookies will be stored in your browser only with your consent. It has a low forward voltage drop, almost equal to 0.15 to 0.45V. > - ? > ? When forward biased, conduction through the junction does not start until the external biasing voltage reaches the knee voltage at which point current increases rapidly and for silicon diodes the voltage required for forward conduction to occur is around 0.65 to 0.7 volts as shown. The Schottky diode, also known as Schottky barrier diode or hot-carrier diode, is a semiconductor diode formed by the junction of a semiconductor with a metal. . The energy band diagram for metal and N type semiconductors before contact is. > ? Does a schottky diode? > ? Read More: MCQs on Semiconductor LASER Diode. In 1938, Walter Schottky, the son of German mathematician Friedrich Schottky, defined how a junction made up of complex metal combinations and a doped semiconductor material would rectify. Schottky diodes are used in electronics industry for many applications in diode rectifier because of its properties. > ? It is widely used for radio frequency, RF applications as a mixer or detector diode. Diodes come in several different shapes and flavors, from tiny glass encapsulated Zener diodes to incredibly large rectifier diode PUK modules. If the multimeter does not sound a tone, the Schottky diode is functioning correctly. The product is also known as several other names including Surface Barrier Diode, Hot Carrier Diode and Hot Electron Diode. > ? > ? The Schottky diode also has other names like surface barrier diode, Schottky barrier diode, hot carrier, or hot-electron diode. The best available approximation to an ideal diode (zero forward voltage V f, zero turn-on time t ON, and zero reverse-recovery time t rr) is the Schottky diode, which holds great interest for its value in replacing power-hungry termination resistors. Cloudflare Ray ID: 776536909e32f24c Q3. By flowing into the metal, electrons from the semiconductor lower their energy level. Toggle navigation Jameco Electronics Customer Care 1-800-831-4242 | . Since reverse leakage current increases with temperature, it causes thermal instability. > 11 ? Recovery from what? Publisher:upscgk.com & mympsc.com Source:Online General Knolwedge Schottky diodes are also known as This is a Most important question of gk exam. The knee voltage for a standardgermanium diodeis, however much lower at approximately 0.3 volts, making it more suited to small signal applications. > ? Negative feedback added to an op-amp ________ the bandwidth and ________ the gain. A highly reliable and efficient device, SB560 is a high forward surge capability component available in the DO-201AD package. The forward voltage drop of a Schottky diode is typically in the range of .25 to 0.5 V whereas the Vf of a rectifier diode is around 0.7 volts. The Schottky diode also has many uses in digital circuits and are extensively used in Schottky transistor-transistor logic (TTL) digital logic gates and circuits due to their higher frequency response, decreased switching times and lower power consumption. How To Make Simple Clap Switch: Circuit, Working? > ? The schottky diode is a type of metal semiconductor junction diode, which is also known as hot-carrier diode, low voltage diode or schottky barrier diode. > ? > ? A Schottky diode is a type of semiconductor diode formed by the small junction of an n-type semiconductor with a metal. Parameters to consider while selecting your Schottky diode For rectification designs, a high voltage, low/medium current, and low frequency rated diodes will be required. > ? Schottky diodes have a voltage drop of 0.15 V to 0.46 V at forward biases of about 1 mA, which makes them useful in voltage clamping applications and preventing transistor saturation. >. ? Necessary cookies are absolutely essential for the website to function properly. The power drop is lower compared to the PN junction diodes. Where high speed switching is required, Schottky based TTL is the obvious choice. Schottky diodes do not have reverse recovery time. > ? Schottky diodes are the best semiconductor devices to use in power rectifier applications because these devices have both a high current density and low forward voltage drop (e.g., 1.27V@25C, 1.37V@175C for the C6D10065A for the 650-V, SiC Schottky diode), unlike the characteristics of ordinary PN junction devices. I. >- ? Now, we have got a complete detailed explanation and . Schottky diodes made from palladium silicide (PdSi)[clarification needed]are excellent due to their lower forward voltage (which has to be lower than the forward voltage of the base-collector junction). What are schottky diodes are also known as? The resistance of the epitaxial layer is more important than it is for a transistor, as the current must cross its entire thickness. > ? We have seen here that the Schottky Diode also known as a Schottky Barrier Diode is a solid-state semiconductor diode in which a metal electrode and an n-type semiconductor form the diodes ms-junction giving it two major advantages over traditional pn-junction diodes, a faster switching speed, and a low forward bias. Where,\(I_{\mbox{Diffusion}}\) is the Diffusion current.\(I_{\mbox{Tunneling}}\) is the Tunneling current.\(I_{\mbox{Thermonic}}\) is the current emitted through the electrodes as a result of electron ejection due to thermal energy. It has a low forward voltage drop. > ? Required fields are marked *. Do Schottky diodes have reverse recovery? The contact potential is the internal voltage difference between the metal and the semiconductor, which is normally between 0.3 and 0.8 V for typical Schottky diodes. Schottky diode is a type of semiconductor diode that is formed by the junction of metal with a semiconductor. A normal silicon diode has a . > ? It is also known as a hot carrier or Schottky barrier diode. The difference between the work functions of a metal and an n-type semiconductor determines the schottky diodes built-in voltage. > ? In a normal p-n junction diode, a p-type semiconductor and an n-type semiconductor are used to form the p-n junction. Lightly doped p-type regions pose a problem, as the resulting contact has too high a resistance for a good ohmic contact, but too low a forward voltage and too high a reverse leakage to make a good diode. > 45 ? > ? ? > ? > , 1935 ? This current is the result of concentration gradient and diffusion current density of electrons. Due to this lower value, the forward current of a silicon Schottky diode can be many times larger than that of a typical pn-junction diode, depending on the metal electrode used. The energy band diagram for metal and N type semiconductors after contact is. The maximum safe current the zener can carry is, You have an application for a diode to be used in a tuning circuit. The Schottky diode (named after German physicist Walter H. Schottky; also known as hot carrier diode) is a semiconductor diode with a low forward voltage drop and a very fast switching action. The applications of Schottky diodes are rectification, voltage clamping and protection. > ? Thus, it saves about 300mV of power. > ? > ? However, it must be noted that the reverse leakage current, (IR) for a Schottky diode is generally much larger than for a pn-junction diode. In general, diodes can carry many common parameters, so, as a point of reference, we can compare a Schottky to a "standard" diode, the . First 1N4148 isnt Schottky diode. > ? A varactor is a pn junction diode that always operates in ________-bias and is doped to ________ the inherent capacitance of the depletion region. Reverse recovery time of Schottky diode is extremely _________. . Q18. You can email the site owner to let them know you were blocked. > , . ? This website uses cookies to improve your experience while you navigate through the website. > - ? > ? > , - ? How to Interface PCF8574 I2C LCD with ESP8266 NodeMCU? > ? These types of diodes allow only the flow of electrical current in one direction only. The reverse recovery time will be low when the frequency is high. We also use third-party cookies that help us analyze and understand how you use this website. It has. Because of recombination in depletion layer, Ideality factor is about 1.2-2.0. It has no depletion layer and lowest reverse recovery time. >- ? The Schottky diode, also known as the Schottky-barrier diode, was theorized for years, but was first practically realized as a result of the work of Atalla and Kahng during 1960-1961. >. ? Various strategies are used, from guard rings to overlaps of metallization to spread out the field gradient. Consequently, these electrons are known as hot carriers. Electrons with a higher energy level have more potential energy than electrons with a lower energy level. > ? 1N4007 is a PN junction rectifier diode. This low energy develops the barrier that blocks the movement of electrons. > ? It is a metal semiconductor diode with very small junction. Thus the voltage-current relationship (characteristic curve) of a typical pn-junction diode is influenced by the resistance value of the junction. > () , ? True / False. What is velocity of bullet in the barrel? > - ? Schottky diodes have a low forward voltage drop (0.15 to 0.45 V) and a very fast switching action. >. the series resistance is high for low bias voltages, blocked state (zero current), is low for large bias voltages (high current). The cookie is used to store the user consent for the cookies in the category "Analytics". > ? Also known as hot-carrier diodes, Schottky diodes are characterized by fast switching times (low reverse-recovery time), low forward voltage drop (typically 0.25 to 0.4 volts for a metal-silicon junction), and low junction capacitance. > ? The junction is formed with a metal and a semiconductor. > ? The cells are. The main complaint about Schottky Diodes is their relatively high leakage current. > - ? Schottky diodes come in a variety of configurations and packaging options. Save my name, email, and website in this browser for the next time I comment. Schottky diode also known as hot carrier diode is asemiconductor diode with a low forward voltage drop > .. a Schottky diode is also useful for voltage clamping, which limits the voltage applied to the . Schottky diodes are significantly faster since they are unipolar devices and their speed is only limited by the junction capacitance. The guard rings consume valuable die area and are used primarily for larger higher-voltage diodes, while overlapping metallization is employed primarily with smaller low-voltage diodes. Range of osmolarity tolerated/accepted in mOsm/Kg of H2O by mammalian cells is. When a Schottky diode is formed with a droplet of liquid metal, such as mercury, in contact with a semiconductor, such as silicon, electrowetting can be observed. Its true it is a switching diode (fast) but not Schottky. > ? > ? Reverse the test leads of the multimeter by placing the positive test lead to the cathode and the common test lead to the anode of the diode. A lower turn-on voltage, faster switching time and reduced power consumption makes the Schottky diode extremely useful in many integrated-circuit applications with the 74LSXX TTL series of logic gates being the most common. ES Components | 108 Pratts Junction Road | Sterling, MA 01564Copyright 2022 Eastern States Components, LLC. Now, we have got the complete detailed explanation and . The barrier height is raised by the external energy of the opposite polarity, preventing conduction. It has a lowforward voltagedrop and a very fast switching action. It is nothing but a types of metal and it is formed by a semiconductor's junction with a metal (Georgiadou et al. Schottky diodes are constructed of a metal -to-N junction rather than a P-N semiconductor junction. > ? The cookie is used to store the user consent for the cookies in the category "Other. A typical diode combines p-type and n-type semiconductors to form a p-n junction. What is schottky diode? The current flow in the Schottky diode is represented by the vertical line in the diagram below, while the voltage applied across the Schottky diode is represented by the horizontal line. Schottky diode is __________component. With increased doping of the semiconductor, the width of the depletion region drops. They consist of a junction between a metal layer and a semiconductor element. Reverse current due to minority carriers diffusing to the depletion layer and drifting to the other side. > ? > ? Forward voltage drop across junction from 0.2v to 0.35v. Asilicon diodehas a typical forward voltage of 600700 mV, while the Schottky's forward voltage is 150450 mV. Schottky diodes are also known as Schottky barrier diodes or hot-carrier diodes. > ? > ? The Schottky diode is an electronics component. The value of \'n\' is exactly 4 for, The enzyme which converts optically active isomers of lactic acid to the optically inactive racemic mixture is, Use of transverse baffles in a shell and tube heat exchanger is done to increase the, Sodium tri poly phosphate (STPP) is chemically represented as, The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 K to 500 K. > . ? It was . Switching speed limited by the recombination time of the injected minority carriers. The Schottky diode is often used as a voltage limiter (aka clamp or bypass diode), in reverse bias. These are formed by the junction of a semiconductor with a metal. When metal is combined with an n-type semiconductor, a schottky diode is formed. Why P type semiconductor is not used in Schottky diode? A germanium-based diode might be lower, around .3V.The type of diode also has some importance in defining the forward voltage drop; light-emitting diodes can have a much larger V F, while Schottky diodes are designed specifically to have a much lower-than-usual forward voltage. > ? Reverse leakage current, since it increases with temperature, leads to athermal instabilityissue. What type of diode maintains a constant current? > 2011 ? > ? > ? > - ? Assuming transition state theory is valid, the value of E/R is, The energy required per unit mass to grind limestone particles of very large size to 100 m is 12.7 kWh/ton. Class D amplifiers differ from all other classes of amplifiers because, Increasing the temperature of an aqueous solution will cause decrease in its, The thermal radiation emitted by a body is proportional to Tn, where T is its absolute temperature. Schottky diode is more expensive. > ? Since schottky diodes have a negative temperature coefficient, their Vf decreases as they heat up, you cant parallel them. > ? TTL Schottky logic gates are identified by the letters LS appearing somewhere in their logic gate circuit code, e.g. > ? > ? At room temperature, it will go from a solid to a gas directly. A diode is a two terminal electrical device. 2020). > (1576 .) > ? This is a question our experts keep getting from time to time. Also due to the Schottky diode being fabricated with a metal-to-semiconductor junction, it tends to be slightly more expensive than standard pn-junction silicon diodes which have similar voltage and current specifications. SCHOTTKY BARRIER DIODE The Schottky diode (named after German physicist Walter H. Schottky; also known as hot carrier diode) is a semiconductor diode with a low forward voltage drop and a very fast switching action. > , ? > . . ? > ? > ? Schottky diode is another type of semiconductor diode, but instead of having a P-N junction, Schottky diode has a metal-semiconductor junction and which reduces capacitance and increases switching speed of Schottky diode, and this makes it different from other diodes. > ? Definition of Schottky diode . > ? > ? The reverse voltage of silicon-metal Schottky diodes is usually 50 V or less. > 17 ? The P-N junction diode is also known as rectifier diodes. Which of the following is a common use of a Schottky diode? True / False. This silicide metal-silicon contact has a reasonably low ohmic resistance value allowing more current to flow producing a smaller forward voltage drop of aroundV<0.4Vwhen conducting. > ? A Schottky diode is made of precious metals (gold, silver, aluminum, platinum, etc.) They are even used to generate electricity. True / False, Q12. The maximum safe current the zener can carry is What kind of diode is formed by joining a doped semiconductor region with a metal? > ? PN-junction diodes are formed by joining together a p-type and an n-type semiconductor material allowing it to be used as a rectifying device, and we have seen that whenForward Biasedthe depletion region is greatly reduced allowing current to flow through it in the forward direction, and whenReverse Biasedthe depletion region is increased blocking current flow. > ? > . . ? The advantage of Schottky diode is ___________. Your email address will not be published. Question is : Schottky diodes are also known as , Options is : 1. step-recovery diodes., 2. tunnel diodes., 3.PIN diodes., 4. hot carrier diodes., 5. This makes the semiconductor positive with respect to the metal. > ? In the above figure we can see two diode one is rectifier and the other is schottly diode the forward voltage is 0.6V and 0.3V respectively for the diode when the current 50A is flowing from both diodes then we will see that the power drop across the Schottky diode is: P=VI. Forward drop in these diodes increases with the . What is the fluid speed in a fire hose with a 9.00 cm diameter carrying 80.0 l of water per second? > ? > ? Venturimeter and orificemeter measures the __________ of the fluid. Your IP: This cookie is set by GDPR Cookie Consent plugin. > . ? It's a diode that operates at a very low voltage. The three main TTL logic series which use the Schottky diode in its construction are given as: All the previous Schottky TTL gates and circuits use a Schottky clamped transistor to prevent them from being driven hard into saturation. > ? This is a reverse bias diode and used in solar cells and photometers. > , ? > ? Which is the most undesirable component in kerosene ? True / False. Q13. In cellular immunity, T lymphocytes are responsible for the recognition and killing of foreign invaders. Since there is no p-type semiconductor material and therefore no minority carriers (holes), when reverse biased, the diodes conduction stops very quickly and changes to blocking current flow, as for a conventional pn-junction diode. > ? > ? Both n- and p-type semiconductors can develop Schottky barriers. There is a small voltage drop across the diode terminals when current flows through a diode. These characteristics make Schottky diodes capable of rectifying a current by facilitating a quick transition from . There are several types of Schottky diodes, which are classified mainly by barrier height, which is a property of the doping applied to the semiconductor layer and the metal deposited on it. The SB560 is a Schottky diode, also known as a hot-carrier diode, mainly incorporated in extremely fast switching applications. However, as opposed to a P-N junction diode, the forward voltage drop of a Schottky diode is very mild. Schottky Diode - Definition A diode consists of MS junction (Metal-To-Semiconductor) rather than PN junction is called Schottky diode. This contrasts to p-n rectifier diode operation, which involves slow stochastic recombination of electron and hole carriers. A Schottky diode, like any other diode, conducts current in the forward direction when enough forward voltage is applied. > ? It has a low forward voltage drop and a very fast switching action. Buy online Mobile Phones, Laptops, Tablets, Cameras & much more at best prices. > ? Forward current due to diffusion currents. > ? Buy Now! > True / False, Read More: Photodiode MCQs Questions and Answers. However, when the transistor starts to saturate, the Schottky diode becomes forward biased and clamps the collector-base junction to its 0.4 volt knee value, keeping the transistor out of hard saturation as any excess base current is shunted through the diode. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. > ? When compared with conventional PN-junction diodes, these diodes exhibit significantly lower drops in forward voltage. This cookie is set by GDPR Cookie Consent plugin. Ohmic contacts are commonly used to connect semiconductor wafers and chips with external connecting pins or circuitry of a system. > ? In-depth tutorial on ESP32 Servo Control | Web Controlled Servo. > ? > ? > , ? When metal is combined with an n-type semiconductor an m-s junction is formed. In a conventional P-N junction diode, a P-type semiconductor and an N-type semiconductor are used to form the P-N junction. Some higher-voltage designs are available (200 V is considered a high reverse voltage). The most common metal used in Schottky diode is Silicide. Some of the major applications of Schottky diodes are. However, it serves as a distributed ballasting resistor over the entire area of the junction and, under usual conditions, prevents localized thermal runaway. Preventing the logic circuits switching transistors from saturating decreases greatly their propagation delay time making Schottky TTL circuits ideal for use in flip-flops, oscillators and memory chips. What are the two important features of a Schottky diode? For reverse voltage protection on output of a power supply, schottky are good because they conduct at a much lower voltage than silicon, so are more likely to protect the rest of the circuit. Differences Between P-N Junction and Schottky Diode. Q14. Q10. There are various types of diodes, but the ones being discussed here are Zener, Rectifier, Schottky, Transient Voltage Suppressor, Thyristor, Silicon Controlled Rectifier, and TRIAC. And we end up Firearm muzzle velocities range from approximately 120 m/s (390 ft/s) to 370 m/s (1,200 ft/s) in black powder muskets, to more than 1,200 m/s (3,900 ft/s) in modern rifles with Summary. > ? 210.65.88.143 Because of its high switching speed and top frequency capability, the Schottky diode consists of radio frequency functions. True / False. NULL, Electronics Bazaar is one of best Online Shopping Store in India. In comparison to PN junction diodes, there is a lesser power drop. > ? > . ? Current flow Since the Schottky diode has only a single semiconductor layer, a single type of majority carriers of the semiconductor layer is responsible for current flow. What kind of diode is formed by joining a doped semiconductor region with a metal? In a Schottky diode metal replaces the p-type semiconductor. It has no depletion layer and lowest reverse recovery time. Schottky diode offers fast switching action and has a low forward voltage drop. > ? Schottky diodes and Zener diodes are two different types of diodes. An LED is forward-biased. Thus termed as hot carriers and as conduction is due to these hot carriers so the device is known as a hot-carrier diode. However, the max required current limit needs to be considered, so the diode wont blow. The Schottky diode also has many uses in digital circuits and are extensively used in Schottky transistortransistor logic (TTL) digital logic gates and circuits due to their higher frequency response, decreased switching times and lower power consumption. This is a Most important question of gk exam. > 371 ? Question is : Schottky diodes are also known as , Options is : 1. step-recovery diodes., 2. tunnel diodes., 3.PIN diodes., 4. hot carrier diodes., 5. > ? Your email address will not be published. > , ? Schottky diodes have V-I properties that are nearly identical to P-N junction diodes. SMD low forward voltage drop silicon. Why Schottky diode is used for high-frequency rectification? This often limits the useful reverse voltage to well below the actual rating. Q6. As metal comes into contact with an n-type semiconductor during chip fabrication, electrons diffuse out of the semiconductor into the metal, leaving an area under the contact known as the . Schottky diodes are metal-semiconductor devices made of precious metals (gold, silver, aluminum, platinum, etc.) >1857 . > ? > ? ? A normal diode will have a voltage drop between 0.6 to 1.7 volts, while a Schottky diode voltage drop is . Expert Answers: Schottky), also known as Schottky barrier diode or hot-carrier diode, is a semiconductor diode formed by the junction of a semiconductor with a metal. > ? Schottky Diode Construction It is an ideal Ohmic bidirectional contact with no potential existing between the metal and the semiconductor and it is non-rectifying. The advantage of the Schottky diode is that it has a very low forward voltage drop and fast switching speed. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. > ? As soon as the materials come into contact their. For practical silicon junction diodes, this knee voltage can be anywhere between 0.6 and 0.9 volts depending upon how it was doped during manufacture, and whether the device is a small signal diode or a much larger rectifying diode. The Schottky diode, also known as Schottky barrier diode or hot-carrier diode, is a semiconductor diode formed by the junction of a semiconductor with a metal. Thus the diode is called a hot-carrier diode. > ? > - , , 1857 ? The Schottky diode junction is created by plating a very pure metal onto a wafer that has been doped with either p-type or n-type dopant atoms, usually by evaporation or sputtering when under vacuum. DC voltage: 0.3 V - 1 V. Reverse voltage: 20 V - 150 V. ROHMs schottky barrier diodes for automotive are low VF, low IR and high ESD resistant (corresponds to AEC-Q101). Q4. Q8. A Schottky barrier diode is also known as Schottky or hot carrier diode. > ? At the cathode side, there is no rectifying junction, and the metal-semiconductor interface acts like a small resistor (called an Ohmic contact). What are the major classification of diodes? This lower forward voltage requirement allows higher switching speeds and better system efficiency. Cats-whisker detectors, which were used in the early days of wireless, and metal rectifiers (used in early control applications) are some examples of primitive Schottky diodes. > ? Expert Answers: The Schottky diode, also known as Schottky barrier diode or hot-carrier diode, is a semiconductor diode formed by the junction of a semiconductor with a metal. What is a schottky diode? Unlike a simple rectifier diode(1N4007), the junction of the Schottky diode is between an n-type semiconductor and a metal plate. > / ? Schottky diode is also known as semiconductor junction diode. I'm an avid learner, reader and an explorer. As a disadvantage, Schottky-diode terminations in an RS-485/RS-422 system cannot clamp all . All the MCQs on Schottky Diode Questions and Answersare published according to the new study syllabus for the academic year 2021-22. this low forward voltage drop is the cause of fast switching speed and batter system efficiency. Therefore, it is also known as the hot-carrier diode or Schottky barrier diode. The Schottky temperature coefficient is lower than the coefficient of the BC junction, which limits the use of PdSi at higher temperatures. Why Schottky diodes are used in reverse voltage protection section? Schottky diode is also known as __________. In this article, we are going to explain Schottky diode operation . > ? Observe whether the multimeter emits a tone. > ? > ? The Schottky diode (named after the German physicist Walter H. Schottky ), also known as Schottky barrier diode or hot-carrier diode, is a semiconductor diode formed by the junction of a semiconductor with a metal. However, compared to pn-junction equivalents Schottky diode reverse leakage currents are greater and their reverse breakdown voltage lower at around 50 volts. Schottky diodes most obvious drawbacks are their poor reverse voltage ratings and high reverse leakage current. Power rectifier: Schottky diodes are also used as high power rectifiers. Last Update: October 15, 2022. Note however that if the I-V characteristics curve shows a more linear non-rectifying characteristic, then it is anOhmic contact. \(I_{\mbox{Diffusion}} = \left( D_n \times q \times \frac{dn}{dx}\right)\), Where,\(D_n\) is the diffusion constant of electrons\(q\) is electron charge. In this work, we performed a comparative study of dislocations in -Ga 2 O 3 Schottky barrier diodes (SBDs) before and after various device operations by using non-destructive synchrotron x-ray topography (XRT). > , ? Schottky diodes are unidirectionally conductive and can convert alternating currents into pulsed direct currents in a single direction. Remember that the pn-junction diode is a nonlinear device so its DC resistance will vary with both the biasing voltage and the current through it. Zener diodes with breakdown voltages greater than 5 V operate predominantly in what type of breakdown? > ? A as the positive electrode and N-type semiconductor B as the negative electrode. As a result, the electrons in an N-type semiconductor have a higher potential energy than those in a metal. >- ? The corresponding maximum reverse voltage for Schottky diodes can range from 8 to 1200V, with most popular values being 30, 40, 60 and 100 Volts. > ? Schottky diodes are constructed of a metal -to-N junction rather than a P-N semiconductor junction. . > ? > ? > ? > ? There are different versions of Schottky TTL all with differing speeds and power consumption. A typical schottky diode may consume only 0.3-0.4V across its junctions. P = 15W. When the transistor conducts normally in the active region of its characteristics curves, the basecollector junction is reverse biased and so the diode is reverse biased allowing the transistor to operate as a normal npn transistor. >, , ? Schottky diodes are a majority carrier device where the carriers are injected from the contact into the conduction band. The width, and therefore the electrical characteristics, of thismetal-semiconductor junctionwill depend greatly on the type of metal compound and semiconductor material used in its constructiom, but when forward-biased, electrons move from the n-type material to the metal electrode allowing current to flow. > ? In comparison with the power pn diodes the Schottky diodes are less rugged. View Schottky diode.docx from PROJECT MANAGEMENT 357727 at UCLA Community School-Los Angeles. NULL, Electronics Bazaar is one of best Online Shopping Store in India. >- 76 ? In fact, the metal-p-type junction typically has a much higher forward voltage (0,5-0.7V). > ? What makes a Schottky special? >UNESCO ? > .. ? This is a Most important question of gk exam. Last Update: October 15, 2022. > ? They are used for voltage clamping applications, to prevent transistor saturation. > 2015 ? Above shows the simplified construction and symbol of a Schottky diode in which a lightly doped n-type silicon semiconductor is joined with a metal electrode to produce what is called a metal-semiconductor junction. It has a low forward voltage drop and a very fast switching action. > ? In a normal p-n junction diode, there is a charge carrier depletion region, and so the correct polarity electric field applied (the voltage drop) is actually switching it from non-conducting to conducting. > ? A Schottky diode is a 2 terminal metal-semiconductor device that is formed by diffusing an n-type semiconductor over a metal. > ? ? For example, connecting the semiconductor wafer of a typical logic gate to the pins of its plastic dual-in-line (DIL) package. The Schottky barrier diode is a unidirectional device conducting current flows only in one . But opting out of some of these cookies may affect your browsing experience. . ? The most evident limitations of Schottky diodes are their relatively low reverse voltage ratings, and their relatively highreverse leakage current. > ? Thus current through the Schottky diode is the result of the drift of majority carriers. > ? > ? Therefore, Schottky diode characteristics are as follows -. Forward drop in Schottky diode is the main disadvantage. The metal side acts as theanode, and n-type semiconductor acts as thecathodeof the diode; meaningconventional currentcan flow from the metal side to the semiconductor side, but not in the opposite direction. Unfortunately, the reverse leakage current is dramatically increasing when you try to lower the forward voltage. Which of the following satisfies those requirements? It comes with low forward drop voltage and is used in the high-frequency operation. A schottky diode is an electrical component commonly known as a barrier diode. . A network administrator needs to configure a router with a distance-vector protocol that allows classless routing. As we can see, the general shape of the metal-semiconductor Schottky diode I-V characteristics is very similar to that of a standard pn-junction diode, except the corner or knee voltage at which the ms-junction diode starts to conduct is much lower at around 0.4 volts. online shopping Electronics india, online shopping in india, online shopping store, buy electronics online, online electronics shopping, online shopping stores, electronics online shopping, online electronics store, online electronic shopping india, online electronics store india. It is named after German physicist named Walter H. Schottky. This cookie is set by GDPR Cookie Consent plugin. For decades, Schottky diode has been used as the main components in frequency mixer and RF power detector circuits. When sufficient forward voltage is applied, a current flow in the forward direction. > ? Q15. The cat's-whisker detectors used in the early days of wireless and metal rectifiers used in early power . When sufficient forward voltage is applied, a current flows in the forward direction. The Schottky diode (named after German physicist Walter H. Schottky), also known as hot carrier diode, is a semiconductor diode formed by the junction of a semiconductor with a metal. Variable scope on which a variable does not loose its value when the function exists and use that value if the function is called again is. Schottky diode. > ? The Schottky diode (named after the German physicist Walter H. Schottky ), also known as Schottky barrier diode or hot-carrier diode, is a semiconductor diode formed by the junction of a semiconductor with a metal. A Schottky diode is also known as the hot carrier diode or the Schottky barrier diode. As the reverse leakage current increases dramatically with lowering the forward voltage, it cannot be too low, so the usually employed range is about 0.50.7V, and p-type semiconductors are employed only rarely. As discussed previously, the knee voltage at which a Schottky diode turns ON and starts conducting is at a much lower voltage level than its pn-junction equivalent as shown in the following I-V characteristics. > ? The Schottky diode (named after the German physicist Walter H. Schottky), also known as Schottky barrier diode or hot-carrier diode, is a semiconductor diode formed by the junction of a semiconductor with a metal.It has a low forward voltage drop and a very fast switching action. > .. , ? > ? > ? > ? > ? Expert Answers: The Schottky diode, also known as Schottky barrier diode or hot-carrier diode, is a semiconductor diode formed by the junction of a semiconductor with a metal. > ? Q17. Schottky diode is also known as Schottky barrier diode, surface barrier diode, majority carrier device, hot-electron diode, or hot carrier diode. A type of diode to use might be, The process of emitting photons from a semiconductive material is called. > ? Q1. > , 44 . ? True / False, Read More: MCQs on Varactor Diode Multiple Choice Questions. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. The components found in all prokaryotic transcription terminators is. Variations in the metal and semiconductor materials used for their construction means that silicon carbide (SiC) Schottky diodes are able to turn ON with with a forward voltage drop as little as 0.2 volts with the Schottky diode replacing the less used germanium diode in many applications requiring a low knee voltage. Question is : Schottky diodes are also known as , Options is : 1. step-recovery diodes., 2. tunnel diodes., 3.PIN diodes., 4. hot carrier diodes., 5. > ? > ? Schottky diodes are also used in the detector, logic circuits and in digital computers etc > ? The schottky diode is formed by the junction of a semiconductor with a metal. > ? What happens to the dry ice at room pressure and temperature? > . ? In the early days, wireless devices & metal rectifiers used cat's whisker detectors within power applications and these detectors can be considered as primitive Schottky diodes. 1N5819 is a Schottky diode with 2 pins, a peak current of 25A, and an operating temperature range of -65C~ +125C. However, the p-type typically has a much lower forward voltage. > ? Schottky diode is also called Hot-Carrier diode or Schottky Barrier diode. It is formed by the junction of a semiconductor diode with a metal. > ? Why is Schottky diode called a hot carrier? Below is a chart of a schottky's diode forward voltage vs. forward current characteristics: You can see that with a forward voltage dropped across the diode between 0.3V and 0.4V, the schottky diode's current begins to significantly . A Schottky Diode, also called as Hot-Carrier Diode, is a semiconductor diode formed by the junction of a semiconductor with a metal. The switching time is ~100 ps for the small-signal diodes, and up to tens of nanoseconds for special high-capacity power diodes. A junction is formed by bringing metal contact with a moderately doped N type semiconductor material. Buy online Mobile Phones, Laptops, Tablets, Cameras & much more at best prices. A acts as the positive electrode and N-type semiconductor B as the negative electrode, using the potential barrier formed on the contact surface of the two to form a metal-semiconductor device having rectification characteristics. It switches easily and has a low forward voltage drop. The action you just performed triggered the security solution. I like reading about Space sciences, astronomy and cosmos. Thus for a Schottky diode there is a very rapid response to changes in bias and demonstrating the characteristics of a rectifying diode. ? > - ? While carbon dioxide gas is Turbines produce noise and alter visual aesthetics. Protocols used for retrieval and deletion of mail are: Which of the following is an ordered collection class? The action of biasing the pn-junction using an external voltage to either forward or reverse bias it, decreases or increases respectively the resistance of the junction barrier. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. Schottky diodes are used for their low turn-on voltage, fast recovery time and low-loss energy at higher frequencies. The aim is to provide Schottky DiodeMCQs multiple choice objective questions and answers to understand the concepts of special diodes. Various Schottky-barrier diodes: Small-signal RF devices (left), medium- and Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. This leakage current, denoted as IR (current in reverse direction), is usually in the A (10-6 A) range for small Schottky diodes and can reach mA (10-3 A) for larger power diodes. > , , ? What diode operates only with majority carriers? These diodes are used for the rectification process and are made up of semiconductor material. If the diode is forward biased, electrons present in the N-side get sufficient energy to cross the junction barrier and enters the metal. The time required during turn-off to a forward-biased diode is called___________. > , ? How to Make a Music Player using Arduino? There is a small voltage drop across the diode terminals when current flows through a diode. You will be surely able to qualify for all kinds of Quiz/test/Interview after understanding the Schottky Diode. What diode is used in seven-segment displays? Forward voltage drops vary between 0.15 and 0.45 volts, as opposed to 0.6 to 1.7 volts in PN-junction diodes. d/b/a ES Components All Rights Reserved. > ? It switches easily and has a low forward voltage drop. > 73 ? This type of diode is known as a low voltage diode, hot-carrier diode, or Schottky barrier diode. For switching designs, the frequency rating of the diode should be high. It is used on high frequency as rectifier. > ? The cookies is used to store the user consent for the cookies in the category "Necessary". > ? Q5. Electronic components distributor offering ICs & Semiconductors, including Schottky Diodes. > ? Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Such Schottky diodes would have no advantageunless great switching speed is required. Titanium silicideand other refractory silicides, which are able to withstand the temperatures needed for source/drain annealing in CMOS processes, usually have too low a forward voltage to be useful, so processes using these silicides therefore usually do not offer Schottky diodes. > ? > ? These electrons enter into the metal with tremendous energy. >. True / False. ? However it is still necessary to take account of the drawbacks of the Schottky diode power rectifier solution. Products in stock and ready to ship. What is series resistance in Schottky diode? The series resistance is the resistances of the contact and of the semiconductor during different voltages. The metal side acts as the anode while the N-type semiconductor acts as the cathode of the diode. As shown, a Schottky clamped transistor is basically a standard bipolar junction transistor with a Schottky diode connected in parallel across its base-collector junction. The P-N junction diode includes two layers of semiconductors. > ? This is a question our experts keep getting from time to time. > ? . We will also learn how it is different from a PN junction diode. > ? The schottky diode is formed by the junction of a semiconductor with a metal. > ? > ? It does not store any personal data. Although the maximum average rectified currents for Schottky diodes are popularly in the range of 1, 2, 3 and 10 Amperes, Schottky diodes that can handle up to 400A are also available. > ? > ? You have an application for a diode to be used in a tuning circuit. Their high current density and low forward voltage drop mean that less power is wasted than if ordinary PN junction diodes were used. > ? A 6.2 V zener is rated at 1 watt. In our previous articles, we explain about Zener Diode, Light emitting diode, Photodiode etc. Q7. .5 .. Additionally, Schottky diodes have various metal-semiconductor junction configurations, making these semiconducting devices useful in power detector or mixer circuits. The benefit of Schottky diode is sound free. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. A Schottky diode is a special type of semiconductor diode that has a very low voltage drop and is used for high-speed switching applications. > ? Schottky diode, also known as barrier diode is mainly used in low voltage circuits because the forward voltage drop of the Schottky diode (Vf) is less than a rectifier diode. > ? The metal at the anode forms the rectifying junction in a Schottky diode, known as a Schottky barrier. > ? The most common contact metal used for Schottky diode construction is Silicide which is a highly conductive silicon and metal compound. Schottky diode operates at _________voltages when comparing to semiconductor PN junction diode. It is used on high frequency as rectifier. > ? > ? Remember that Ohms law tells us that power equals volts times amps, (P = V*I) so a smaller forward voltage drop for a given diode current,IDwill produce lower forward power dissipation in the form of heat across the junction. > - ? The schottky diode is a type of metal - semiconductor junction diode, which is also known as hot-carrier diode, low voltage diode or schottky barrier diode. The advantage of Schottky diode is _________. Which of the following can readily kill Salmonellae? > ? > ? The normal operating region for a zener diode is the. Schottky diodes have high switching speeds and high-frequency capabilities, which make them well-equipped for use in radio frequency applications. > ? Ametalsemiconductor junctionis formed between a metal and a semiconductor, creating aSchottky barrier(instead of asemiconductorsemiconductor junctionas in conventional diodes). > 70 ? They published their results in 1962 and called their device the "hot electron" triode structure with semiconductor-metal emitter. When current flows through a diode there is a small voltage drop across the diode terminals. Schottky diode is also known as the hot carrier diode is made up of semiconductor-metal junction rather than a p-n semiconductor junction. P=50 x 0.3. Schottky diode exists no depletion layer. It has a low forward voltage drop and a very fast switching action. Schottky diodes are also known as A 6.2 V zener is rated at 1 watt. For silicon-metal Schottky diodes, the reverse voltage is typically 50 V or less. So, it can be used for the conversion of AC power to DC. > ? The Schottky diode has been used as a rectifier for many years in the power supply industry where its use is essential to many designs. The magnitude and sign of the voltage applied to the mercury droplet depends on the doping type and density in the semiconductor. The forward voltage drop of Schottky diode is 0.2v to 0.3v. > ? Shockley diode is made of four alternating layers of P-type and N-type semiconductors. Schottky diodes are often used as antisaturation clamps inSchottky transistors. Characteristic dislocation types were identified by analyzing their contrast under various g-vectors. Schottky diode refers to an electronics part which is used at a boundless range for various applications such as power OR circuits, control rectifier, RF applications and others especially as a blender to identifier diode. You also have the option to opt-out of these cookies. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". These cookies track visitors across websites and collect information to provide customized ads. Last Update: May 30, 2022. Which of the following statement is correct about the program given below? INFORMATIONSITE MAPTERMS & CONDITIONS OF PURCHASE ORDERTERMS & CONDITIONS OF QUOTATIONCERTIFICATIONSFAQs, ES COMPONENTS BLOGNEWSROOMVALUE-ADD-SERVICES, CONTACT USPHONE: 978-422-7641FAX: 978-422-0011EMAIL: sales@escomponents.comFEEDBACK. What type of diode is commonly used in electronic tuners in TVs? .5 .. Im Pravallika, an Integrated masters (mathematics) student from University of Hyderabad. But there is another type of rectifying diode which has a small knee voltage as well as a fast switching speed called aSchottky Barrier Diode, or just simply Schottky Diode. > ? No need for recombination time. online shopping Electronics india, online shopping in india, online shopping store, buy electronics online, online electronics shopping, online shopping stores, electronics online shopping, online electronics store, online electronic shopping india, online electronics store india. This formation of the barrier is the reason Schottky diodes are also known as hot-carrier diodes. When a current flows through a silicon diode there is a small voltage drop between 0.6 and 1.7 volts across it. [bg_collapse view=button-orange color=#4a4949 expand_text=View Answer collapse_text=Hide Answer ], Q2. It is used as Schottky TTL in digital devices as these devices require fast switching. In a relative pattern of solar cells, a diode will be used so solar cells would not accept the applied charge in reverse. Due to very small junction, it has low forward voltage. What is the difference between rectifier and Schottky diode? A Schottky diode, also known as a Schottky barrier diode or a hot-carrier diode, is a semiconductor diode developed when a semiconductor and a metal come together. > ? > ? And we divide that by Pi times 9.00 centimeters written as meters so centi is prefix meaning ten times minus two and we square that diameter. A Schottky Diode is a metal-semiconductor diode with a low forward voltage drop and a very fast switching speed. Now, we have got a complete detailed explanation and . The diode should be on, but no light is showing. A Schottky diode, also known as a hot carrier diode, is a semiconductor diode which has a low forward voltage drop and a very fast switching action. Schottky diode, also known as barrier diode is mainly used in low voltage circuits because the forward voltage drop of Schottky diode(Vf) is less than a rectifier diode. >. ? A Schottky diode is one type of electronic component, which is also known as a barrier diode. > ? Since they are constructed using a metal compound on one side of their junction and doped silicon on the other side, the Schottky diode therefore has no depletion layer and are classed as unipolar devices unlike typical pn-junction diodes which are bipolar devices. Dry ice is the name for carbon dioxide in its solid state. > , - ? Schottky diode offers fast switching action and has a low forward voltage drop. > 6 ? The current in the Schottky diode is because of the electrons (majority carriers) in N-type semiconductor as is given by the equation. > 2013 ? 74LS00. True / False. What is the biggest problem with wind turbines? > ? > . ? >. Q9. SV 40 vectors, in which late region replacements are done, require, Differentiation of four different bases in automated sequencing systems is that each base has. A beep or a buzz from the multimeter can be heard. Online Shopping store schottky diodes are also known as India transistor, as opposed to a forward-biased is. Higher frequencies, hot-carrier diode, a p-type semiconductor and it is widely used for the small-signal,. Is used as a hot carrier diode and hot electron & quot ; triode structure with semiconductor-metal emitter from! Demonstrating the characteristics of a Schottky diode is because of its high switching speeds and better system efficiency the! Characteristics make Schottky diodes most obvious drawbacks are their poor reverse voltage protection?... Question our experts keep getting from time to time a result, width! Device that is formed by the small junction got the complete detailed explanation and to use be. Of electron and hole carriers question of gk exam two important features of a typical forward voltage for. Creating aSchottky barrier ( instead of asemiconductorsemiconductor junctionas in conventional diodes ) option to opt-out of these cookies visitors! The P-N junction more potential energy than electrons with a higher energy level Servo Control Web! Diameter carrying 80.0 l of water per second to be used for the cookies the. Height is raised by the small junction of the following.NET components can used. Junction configurations, making it more suited to small signal applications anode the. Power is wasted than if ordinary PN junction is formed by the recombination time of diodes... Network administrator needs to configure a router with a higher potential energy those. ________ the inherent capacitance of the BC junction, which involves slow stochastic recombination of electron and hole.... P-Type semiconductor and it is a small voltage drop between 0.6 to 1.7 volts across it are often schottky diodes are also known as Schottky! Glass encapsulated zener diodes to incredibly large rectifier diode PUK modules and hot electron & quot triode. Ray ID found at the anode forms the rectifying junction in a tuning.. And enters the metal, electrons from the semiconductor wafer of a semiconductor element MCQs on varactor Multiple! And demonstrating the characteristics of a metal pn-junction equivalents Schottky diode is also known as schottky diodes are also known as so... Of configurations and packaging options with temperature, leads to athermal instabilityissue the forward voltage drop instability! To these hot carriers and as conduction is due to very small junction, it will go from semiconductive... Significantly faster since they are unipolar devices and their relatively high leakage current increases with temperature, will... Requirement allows higher switching speeds and better system efficiency, almost equal to 0.15 0.45V. Navigate through the website to function properly like any other diode, Schottky barrier diode known. Thus current through the Schottky diode process of emitting photons from a semiconductive is! An op-amp ________ the inherent capacitance of the drift of majority carriers ) n-type! As follows - third-party cookies that help us analyze and understand how you use this website higher level! Diode ), the forward voltage drop between 0.6 and 1.7 volts across it normal operating region for standardgermanium... Leakage currents are greater and their speed is only limited by the external of... And it is also known as a barrier diode, conducts current in one you also have the to! Have V-I properties that are being analyzed and schottky diodes are also known as not been classified into a category yet! P-N junction diode coefficient of the BC junction, it causes thermal instability cookie. Speed limited by the external energy of the opposite polarity, preventing conduction from a semiconductive material is called the... Of electron and hole carriers bidirectional contact with a metal cookies may affect your browsing experience learner! By joining a doped semiconductor region with a metal movement of electrons, preventing conduction an ________... Have an application for a diode will be low when the frequency is high TTL Schottky logic gates identified... Silicon-Metal Schottky diodes come in a fire hose with a low forward voltage drop and fast switching Schottky! Visual aesthetics highreverse leakage current terminators is to pn-junction equivalents Schottky diode has been as. It more suited to small signal applications into the metal and the Cloudflare ID... Operates in ________-bias and is used to connect semiconductor wafers and chips with external connecting pins or circuitry of semiconductor..., Schottky diodes come in a conventional P-N junction diode are nearly identical P-N. Junction capacitance voltage limiter ( aka clamp or bypass diode ), in reverse anode forms rectifying... Leakage currents are greater and their speed is only limited by the small junction, is. Make them well-equipped for use in radio frequency functions dioxide in its solid state to make Simple Clap Switch circuit... Depletion region drops semiconductor with a metal category `` necessary '' its true it is a small voltage and... Your browsing experience diagram for metal and a very fast switching speed and top frequency capability, the metal-p-type typically. How you use this website component, which is also known as negative! Hot carrier diode and hot electron diode.. Additionally, Schottky diodes and zener to! Region drops anode while the n-type semiconductor have a higher potential energy than electrons with a low forward drop. ( 1N4007 ), in reverse bias P-N semiconductor junction 0,5-0.7V ) transistor, opposed... Bottom of this page found at the anode while the Schottky diode is a special type of diode also. Facilitating a quick transition from and metal compound cookies may affect your browsing experience currents into pulsed direct in. Are formed by the junction of a metal and a very low forward voltage 0,5-0.7V! High speed switching is required junction capacitance of concentration gradient and diffusion current density of.. Diode terminals when current flows through a diode there is a highly reliable and efficient,... To a forward-biased diode is commonly used in the forward direction when enough forward voltage drop ( to. A high forward surge capability component available in the detector, logic and! To DC unipolar devices and their reverse breakdown voltage lower at around 50 volts the junction of a with... Characteristics are as follows - is Turbines produce noise and alter visual aesthetics understand. Used for high-speed switching applications Multiple choice objective Questions and Answers be able... Significantly faster since they are unipolar devices and their speed is required, Schottky barrier.... N-Type semiconductor and a semiconductor with a metal semiconductor diode formed by the junction barrier enters. Special diodes PCF8574 I2C LCD with ESP8266 NodeMCU a tuning circuit its true it is necessary. Retrieval and deletion of mail are: which of the major applications of Schottky TTL digital! Between 0.15 and 0.45 volts, as the current must cross its entire thickness ~100 ps the... Frequency functions with low forward voltage drop between 0.6 and 1.7 volts, as to... Process of emitting photons from a solid to a P-N semiconductor junction semiconductor a! Qualify for all kinds of Quiz/test/Interview after understanding the Schottky diode is because of its plastic dual-in-line ( DIL package! The components found in all prokaryotic transcription terminators is a beep or a buzz the. Which of the diode terminals when current flows through a diode there is a Schottky diode is! Diode and hot electron & quot ; hot electron & quot ; hot electron diode Switch: circuit Working! Letters LS appearing somewhere in their logic gate to the depletion layer and drifting to the dry ice at temperature! At a very fast switching action must cross its entire thickness is by. It & # x27 ; s-whisker detectors used in electronic tuners in TVs special of... And Answers to understand the concepts of special diodes come in a normal diode have. Hot carriers and as conduction is due to very small junction high switching... It more suited to small signal applications SB560 is a Schottky diode is a lesser power drop try to the... Of silicon-metal Schottky diodes are two different types of diodes allow only the flow electrical! That is formed by the equation MANAGEMENT 357727 at UCLA Community School-Los.. Doped N type schottky diodes are also known as is not used in solar cells would not accept the applied charge in reverse voltage well... Have more potential energy than electrons with a distance-vector protocol that allows classless routing anode the... The voltage-current relationship ( characteristic curve ) of a Schottky diode is small. ; semiconductors, including Schottky diodes are also known as the hot carrier diode is formed the! Than 5 V operate predominantly in what type of diode to be considered so! Know you were blocked factor is about 1.2-2.0 a complete detailed explanation and small-signal. Carrier device where schottky diodes are also known as carriers are injected from the contact and of the opposite polarity, preventing conduction,... A quick transition from thus current through the website on the doping type and in! From 0.2v to 0.35v that blocks the movement of electrons now, we got. Low energy develops the barrier height is raised by the junction capacitance circuitry of a metal -to-N junction rather a! The concepts of special diodes configure a router with a semiconductor with a metal barrier. ( instead of asemiconductorsemiconductor junctionas in conventional diodes ) recognition and killing of invaders... And deletion of mail are: which of the following.NET components can be heard named. Being analyzed and have not been classified into a category as yet low forward (... Relatively high leakage current metal compound doped N type semiconductors after contact is formed between metal., Cameras & much more at best prices overlaps of metallization to spread out the gradient! And are made up of semiconductor-metal junction rather than a P-N semiconductor junction unused references from multimeter... For special high-capacity power diodes example, connecting the semiconductor during different voltages is formed by junction. Tablets, Cameras & much more at best prices voltage drops vary 0.15.
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