What made you want to look up zener diode? A Zener diode is a semiconductor device which conducts in forward biased as well as reversed biased. Rectifier diodes may use a straightforward PN junction diode, or in some cases they may use a … Its symbol is shown in the attached figure. If your language skills aren’t already top-notch, then this vocab quiz can get you up to speed! These devices are used to protect circuits by limiting the voltage and to also transform AC into DC. Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012. a semiconductor diode across which the reverse voltage remains almost constant over a wide range of currents, used especially to regulate voltage. A Zener diode contains a heavily doped p–n junction allowing electrons to tunnel from the valence band of the p-type material to the conduction band of the n-type material, such that the reverse voltage is "clamped" to a known value (called the Zener voltage), and avalanche does not occur. Definition: A special type of PN junction diode that operates in reverse biased mode, more specifically in breakdown region is known as Zener Diode. The Zener diode can be defined as; it is a special kind of diode when we compare with other diodes. Thus, a normal PN junction diode is considered as a unidirectional device. “Zener diode.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/zener%20diode. A diode is a specialized electronic component with two electrodes called the anode and the cathode.Most diodes are made with semiconductor materials such as silicon, germanium, or selenium.Some diodes are comprised of metal electrodes in a chamber evacuated or filled with a pure elemental gas at low pressure. Meaning of Zener diode. Delivered to your inbox! What Does Amen Mean At The End Of A Prayer? Instead, a diode will have negligible resistance in one direction (to allow current flow), and very high resistance in the reverse direction (to prevent current flow). a semiconductor diode that exhibits a sharp increase in reverse current at a well-defined reverse voltage: used as a voltage regulator. A diode is a two-terminal electronic component that conducts electricity primarily in one direction. (This answer goes with the earlier comment above.) Please tell us where you read or heard it (including the quote, if possible). Construction of a zener diode: Zener diode is a special purpose p-n junction diode. A Zener diode is a specially designed, highly doped PN junction diode. If you are a student or simply want to learn how to solve Zener Diode tasks, please visit this sectionof our website where you can find a wide variety of electronic tasks. The constant voltage (V 0 = V Z) is the desired voltage across the load. The amount of voltage required for reverse bias varies according to the Zener … See more. Zener Diode Definition: A heavily doped semiconductor diode which is designed to operate in reverse direction is known as the Zener diode. The Dictionary.com Word Of The Year For 2020 Is …. “Affect” vs. “Effect”: Use The Correct Word Every Time, “Misinformation” vs. “Disinformation”: Get Informed On The Difference, “DNA” vs. “RNA” vs. “mRNA”: The Differences Are Vital, The Most Surprisingly Serendipitous Words Of The Day. A Zener Diode, also known as a breakdown diode, is a heavily doped semiconductor device that is designed to operate in the reverse direction. Semiconductorslike silicon and germanium are used to make the most of diodes. A zener diode is a special kind of diode which allows current to flow in the forward direction in the same manner as an ideal diode, but will also permit it to flow in the reverse direction when the voltage is above a certain value known as the breakdown voltage, "zener knee voltage" or "zener voltage. A diode is a semiconductor device which conducts in one direction only. The voltage needed for this is called the breakdown voltage or Zener voltage. A made up Zener Diode (from standard diodes). Definition: Zener diode is specially designed for operation in the breakdown region in reverse bias condition. This method is also useful when you need a Zener with a … Imagine you're driving through a busy city looking for your friend's home on Light Bulb Avenue. In order to achieve sharp breakdown voltage, it is properly doped. Light-emitting diodes are p-n junctions that emit light when a current flows through them. Definition of Zener diode in the Definitions.net dictionary. The diode consists of a special, heavily doped p-n junction, designed to conduct in the reverse direction when a certain specified voltage is reached. It is also called breakdown diode. Clarence M. Zener †1993 American physicist. Several p-n junction diodes can be connected in series to make a rectifier (an electrical component that converts alternating current to direct current). A diode is effectively like a valve for an electrical circuit.. Semiconductor diodes are the most common type of diode. Zener diode definition semiconductor used on British motorcycles for many years as a voltage regulator . Zener diode temperature characteristic It can be seen in the example given that there is a noticeable difference between the specification for the Zener diode reverse voltage at 0°C and 50°C. What differs Zener diode from regular semiconductor diode is when Zener is reverse-biased, one can notice thatZener diode is able to conduct electricity after exceeding the specified voltage at the junction, so called Zener breakdown voltage without damaging the component. Zener diode - definition. "The device was named after Clarence Zener, who discovered this electrical property. zener diode is a special type of device designed to operate in the zener breakdown region. What does Zener diode mean? Characteristics Curve Figure 8 shows a characteristic curve for a Zener diode. © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Why Do “Left” And “Right” Mean Liberal And Conservative? After exceeding this voltage, current value rapidly increases. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021, Collins English Dictionary - Complete & Unabridged 2012 Digital Edition Learn a new word every day. 'Nip it in the butt' or 'Nip it in the bud'. Information and translations of Zener diode in the most comprehensive dictionary definitions resource on the web. When the voltage across the zener diode reached a certain point, the element would begin to conduct current ,routing it to ground, thus preventing the battery from overcharging. However, the Zener has unique reverse bias qualities that make it differ from the typical diode. Definition of zener diode. When the diode is forward biased, it acts like a diode or a closed switch. The Zener will go into reverse bias at various voltages. It was formerly widely used as a rectifier and detector but has now been replaced in most electrical circuits by the more efficient and reliable semiconductor diode. the act of a person who encloses something in or as if in a casing or covering, a school giving instruction in one or more of the fine or dramatic arts, a comic character, usually masked, dressed in multicolored, diamond-patterned tights, and carrying a wooden sword or magic wand, First recorded in 1955–60; named after U.S. physicist Clarence Melvin, Dictionary.com Unabridged Useful when no Zener part (or the correct voltage) is not available. Zener diodes have a well-defined breakdown voltage, so that current flows in the reverse direction at that voltage and a constant voltage can be maintained despite … A Zener diode is a silicon semiconductor device that permits current to flow in either a forward or reverse direction. Zener diodes are used for providing reference voltages, whilst varactor diodes are used to provide a variable level of capacitance in an RF design according to the reverse bias provided. Working Principle of Zener Diode When a PN junction diode is reverse biased, the depletion layer becomes wider. In the above circuit, the Zener diode of Zener Voltage V Z is connected across the load R L in reverse condition. : a silicon semiconductor device used especially as a voltage regulator. Accessed 10 Jan. 2021. Figure 7.The schematic symbol for the Zener diode. Even though they transmit current in a single direction, the way with which they transmit … the earliest and simplest type of electronic valve having two electrodes, an anode and a cathode, between which a current can flow only in one direction. The figure below shows the circuit arrangement of the Zener diode as a regulator. It has high resistance on one end and low resistance on the other end. A normal diode if operated in reversed biased will get destroyed. A zener diode is like a normal diode, but instead of being destroyed by a big reverse voltage, it lets electricity through. Zener diode definition, a semiconductor diode across which the reverse voltage remains almost constant over a wide range of currents, used especially to regulate voltage. A diode is the ' “Capital” vs. “Capitol”: Do You Know Where You’re Going? Although in the real world, diodes can not achieve zero or infinite resistance. Because it is built with a known breakdown voltage it can be used to supply a known voltage. This needs to be taken into account if the circuit and equipment in which the Zener diode is to be used is subject to temperature change. If this reverse biased voltage across the diode is increased continually, the … Post the Definition of zener diode to Facebook, Share the Definition of zener diode on Twitter, Words From 1921: 100 Years Old and Still Around. American Scientist C. Zener explained the phenomenon of the breakdown. The flow of current in this diode will be in a forward direction or in reverse direction. You see her location on the map but the actual streets have signs that only allow traffic to flow in one direction, the 'one way' street sign. simulate this circuit – Schematic created using CircuitLab. A Zener Diode is a special kind of diode which permits current to flow in the forward direction as normal, but will also allow it to flow in the reverse direction when the voltage is above a certain value – the breakdown voltage known as the Zener voltage. For sma… Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! An electronic device that can be used as a voltage regulator is the Zener diode, Figure 7. 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