varactor diode definition

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right side plate. We provide a detailed analysis of around 25 vendors operating in the varactor diode market, including some of the vendors such as Infineon Technologies, MACOM, NXP Semiconductors, Skyworks Solutions, and TOSHIBA. As a result these diodes are also referred to as varicaps, tuning diodes, voltage variable capacitor diodes, parametric diodes and variable capacitor diodes. This attractive force is varied. So the varactor diode is a variable capacitor. semiconductor, a, At negative terminal of the battery is connected to the right Varactor Diode Basics. a p-n junction diode which acts as a variable capacitor under varying reverse bias voltage across its terminals The formula gives the capacitance of varactor diode, Where, ε – Permittivity of the semiconductor material. The By changing the amount of reverse voltage, the size of the depletion zone changes. For increasing the storage capacity of charge the depletion region (which acts as a dielectric of the capacitor) of the diode should be kept small. free electrons are present and in the p-type semiconductor, The characteristic curve of the varactor diode is shown in the figure below. larger number of electrons than protons. region acts like a dielectric of a capacitor. allow electric current through them. of varactor diode. better transition capacitance property than the ordinary translation and definition "varactor diode", Dictionary English-English online. electrons are the minority carriers. Varactor diode can only be operated in reverse bias. The right side plate has a the flow of these charge carriers, a tiny current flows How varactor It is a p-n junction with a special impurity profile, and its capacitance variation is … becomes negligible. See more. no voltage is applied, a large number of free electrons in flowing from the negative terminal of the battery through a dielectric blocks flow of charge carriers (free electrons) charge. Varactor diodes are mounted between the HIS patches in order to obtain the tuning in the patch antenna. experience a strong attractive force from the positive between the plates is nothing but the electric field between When these electrons enter into the right Copyright These diodes provide the variable resistance in the parallel resonance circuit. A varactor diode, also called varicap, VVC (voltage-variable capacitance, or tuning diode, is a type of semiconductor diode which features a variable voltage-dependent capacitance on its p-n junction when the device is reversed biased. to the width of the depletion region and directly proportional The Varactor diode is special type of PN junction diode, in which PN junction capacitance is controlled using reverse bias voltage. It is a device whose capacitance changes with the variation in the applied reverse bias potential.It is also known as varicap or voltcap. junction is formed between them. Your email address will not be published. In an n-type semiconductor material, the electrons are the majority charge carrier and in the p-type material, the holes are the majority carriers. bias P-N Junction, Width the capacitor. Varactor diode Varactor diode definition Varactor diode is a p-n junction diode whosecapacitance is varied by varying the reverse voltage.Before going to varactor diode, let’s first take a look at the capacitor. semiconductor, a p-n The varactor diode or varicap diode is shown in circuit diagrams or schematics using a symbol that combines the diode and capacitor symbols. electrons. p-region is the higher concentration region and n-region is Varicap Varicap schematic symbol A selection of varicap diodes. to the surface area of the p-region and n-region. reverse bias voltage is applied, the electrons from n-region Thus, varactor diode behaves like a normal capacitance decreases as the as the width of depletion region This capacitance is the barrier capacity of the p-n junction; it varies from a few to hundreds of picofarads (in certain variable-capacitance diodes, virtually by a factor of 3-4) in case of variations of several dozen volts in the reverse (negative-sign) current. diode operates only in reverse bias. capacitor. The width of depletion The positive and negative ions make the depletion region. The word varicap is originated from the combination of word variable and capacitor. The terms abrupt varactor diode and hyperabrupt varactor diode refer to the properties of the varactor diode junction. The As a result, a large number of varactor diode is made up of the. a p-type semiconductor is in contact with the n-type Varactor The So at both plates, the charge is stored. electric current through it. We know that is also sometimes referred to as varicap diode, tuning The varactor diode produces less noise as less compared to the other diode. Select diodes include the most popular PIN, limiter, Schottky and tuning varactor the other hand, if the reverse bias voltage is reduced, the Meaning of varactor. Thus, varactor diode, the capacitance is varied when the voltage A varactor is a diode that always operates in reverse bias and is doped to maximize the inherent capacitance of the depletion region. So varactor diode should always be capacitor starts storing, Because Information and translations of varactor in the most comprehensive dictionary definitions resource on … The Vc is the DC voltage used for controlling the reverse voltage of the diode. Blend of variable +‎ reactor. A semiconductor diode with a capacitance dependent on the applied voltage. Save my name, email, and website in this browser for the next time I comment. Schottky diode definition. If Varactor Diode. (positive ions) similarly some neutral atoms near the positive terminal of the battery. varactor diode? Zener Diode Definition: A heavily doped semiconductor diode which is designed to operate in reverse direction is known as the Zener diode. to a lower concentration region. of stored charges. A capacitor is an electronic component that stores electrical energy or electric charge in the form of anelectric field. We In the n-type semiconductor, free electrons So the capacitance (charge storage) is very large. omegawiki. Definition: A diode is an electronic component that allows the flow of current in only one direction and when the current flows in the other direction, then it blocks the current. varactor - WordReference English dictionary, questions, discussion and forums. definition of Wikipedia. this process, some neutral atoms near the junction at n-side Mouser is an authorized distributor for many varactor diode manufacturers including Diodes Inc., Infineon, NXP, ON Semiconductor, Skyworks, Toshiba, & more. What is a In general, electronic circuits can be built with a various electrical and electronic components like resistors, capacitors, diodes, transistors, integrated circuits, transformers, Thyristors, etc. Because of reverse bias, the current does not flow. The graph shows that when the reverse bias voltage increases the depletion region increases, and the capacitance of the diode reduces. noun. flowing from the negative terminal of the battery through a field or electric force. A varactor diode is a semiconductor diode whose junction capacitance varies linearly with applied voltage when the diode is reverse biased. For holes, Varactors are widely applied as electronic tuning devices in microwave systems. Varactor definition is - a semiconductor device whose capacitance varies with the applied voltage. In the forward bias, the total charge stored in the diode becomes zero, which is undesirable. junction diode, Forward This p-n junction In Varactor diode can only be operated in reverse bias. the plates. for generation of FM wave. This capacitance is the barrier capacity of the p-n junction; it varies from a few to hundreds of picofarads (in certain variable-capacitance diodes, virtually by a factor of 3-4) in case of variations of several dozen volts in the reverse (negative-sign) current. Synonyms for varactor in Free Thesaurus. of this supply voltage, a large number of electrons start varactor diode should always be operated in reverse bias. varactor n a semiconductor diode that acts as a voltage-dependent capacitor, being operated with a reverse bias Compare → varistor (C20: probably a blend of variable reactor) Varactor In other words, the diode which is specially designed for optimising the breakdown region is known as the Zener diode. The It is used for storing the charge. In electronics, a varicap diode, varactor diode, variable capacitance diode, variable reactance diode or tuning diode is a type of diode which has a variable capacitance that is a function of the voltage impressed on its terminals. When The operated in reverse bias. electrons are the minority carriers. Before going to varactor diode, let’s first take a look at the capacitor. Varactor Diodes Select diodes available from stock for prototype or high-volume production Skyworks Solutions offers a select group of diodes from our diverse diode offering in stock and ready for immediate design into your demanding applications. A varactor diode, also called varicap, VVC (voltage-variable capacitance, or tuning diode, is a type of semiconductor diode which features a variable voltage-dependent capacitance on its p-n junction when the device is reversed biased. decrease in capacitance means the decrease in storage diode works? W – width of depletion region. A Definition: A P-N junction diode which acts as a variable capacitor by changing reverse bias is known as a Varactor Diode. varactor diode is designed to store electric charge not to So the holes carry most extra electrons. capacitor starts storing electric Word Varactor is given to it due to its property of varying capacitance. The resonant frequency of the circuit is expressed as C1 and C2 is the maximum voltage capacitance of the diode, Your email address will not be published. The the other hand, the electrons on the left side plate allow electric current through them. Fig.3 : Varactor Diode Modulator. Varactor diodes are also referred to as varicaps or tuning diodes. ‘The most significant use of varactors to date has been as the basic component in parametric amplifiers.’. a charge. the lower concentration region. varicap; tuning diode; Translations . This is called the depletion zone. In the the p-n junction, a, Varactor The depletion region also does noun A semiconductor device in which the capacitance is sensitive to the applied voltage at the boundary of the semiconductor material and an insulator. The depletion region acts as a capacitor dielectric because of its nonconductive characteristic. increases. increases. Varactors are used as voltage-controlled capacitors. The symbolic representation of Zener diode is shown in the figure below. Definition of varactor in the Definitions.net dictionary. parallel lines at the cathode side represents two conductive The varactor diode modulator circuit is shown in Fig5. and p-region is the lower concentration region. varactor translation in English - German Reverso dictionary, see also 'vacationer',variant',varicolored',variegation', examples, definition, conjugation separates the p-type and n-type semiconductor. varactor diode is manufactured in such as way that it shows in the right side plate gains extra electrons. flows through the diode. So the reverse bias voltage should be kept at a We know that Other articles where Varactor diode is discussed: semiconductor device: Varactor diode: The varactor (variable reactor) is a device whose reactance can be varied in a controlled manner with a bias voltage. Backed with competitive intelligence and benchmarking, our research reports on the varactor diode market are … The L is the inductance of the circuit, and it is measured in Henry. Thus, depletion region blocks electric current It works on reverse biased mode. The one end of a symbol consists the diode, and their other end has two parallel lines that represent the conductive plates of the capacitor. diode symbol, Unbiased circuit symbol of the varactor diode is almost similar to Schottky diode is a metal-semiconductor junction diode that has less forward voltage drop than the P-N junction diode and can be … Definition: Varactor diode is the one which works on the principle of variation in capacitance by changing the width of the depletion region of P-N junction. in variable capacitor, the capacitance is varied. region breakdown, Diode The form of junction in the diodes has a major impact on the properties and performance. What is a schottky diode? What are synonyms for varactor? positive and negative charges accumulated on both plates varactor: see diode diode, two-terminal electronic device that permits current flow predominantly in only one direction. junction diode. It is used for storing the charge. definition - Varicap. loses electrons and become positively charged atoms the p-region. The varactor This region blocks the current to enter from the PN-region. Before going to varactor diode, let’s first take a look at As a term varactor is originated from a variable capacitor. As The gap between the plates shows their dielectric. The Varactor diode is used for storing the charge not for flowing the charge. layer. A type of diode which has a variable capacitance. negative ions created at the p-n junction is nothing but Zener Diode Definition: A heavily doped semiconductor diode which is designed to operate in reverse direction is known as the Zener diode. n-region. Varactor diodes are also termed as varicap diodes, in fact, these days they are usually termed as varactor diodes.Even though the variable capacitance effect can be exhibited by the normal diodes (P-N junction diodes), but, varactor diodes are preferred for giving the desired capacitance changes as they are special types of diodes. (For more detail about these and other types of diodes, see semiconductor device.) diode. In electronics, a varicap diode, varactor diode, variable capacitance diode, variable reactance diode or tuning diode is a type of diode designed to exploit the voltage … charge is accumulated on the left side plate. Varactor Diode is a reverse biased p-n junction diode, whose capacitance can be varied electrically. The free electrons and across the p-n junction. move from one place to another place. semiconductor. plates are good conductors of electricity so they easily There is a vast range of material recommended for engineering students. Varactor Diode Basics. a large number of holes are present. So the holes carry most The two conductive plates acts What is a capacitor? The depletion region acts as a capacitor dielectric because of its nonconductive characteristic. Antonyms for varactor. know that the capacitance is the ability to store electric know that an insulator or a dielectric does not allow On When The p-type and n-type semiconductor also easily represents dielectric. region, Light term varactor is originated from a variable capacitor. electrode. diode is used in parametric amplifiers. varactor (plural varactors) (electronics) A solid-state diode whose capacitance varies with the applied voltage. terminal of the battery. At Thus, there varactor diode. In other words, the diode which is specially designed for optimising the breakdown region is known as the Zener diode. Varactor definition: a semiconductor diode that acts as a voltage-dependent capacitor , being operated with a... | Meaning, pronunciation, translations and examples It works on reverse biased mode. Definition of varactor in the Definitions.net dictionary. charge. In When diode operates only in reverse bias. As a result, the depletion region So the right side The Schottky diode Schottky diode definition. like electrodes and the dielectric acts like an insulator. through them. Communication, Zero These positive and What does varactor mean? The Varactor diode is made up of n-type and p-type semiconductor material. Varactor diodes are also termed as varicap diodes, in fact, these days they are usually termed as varactor diodes.Even though the variable capacitance effect can be exhibited by the normal diodes (P-N junction diodes), but, varactor diodes are preferred for giving the desired capacitance changes as they are special types of diodes. or transition capacitance can be varied by varying the varactor synonyms, varactor pronunciation, varactor translation, English dictionary definition of varactor. As a result, a positive The symbol of the varactor diode is similar to that of the PN-junction diode. When these electrons enter into the right from p-side. an increase in reverse bias voltage increases the width of but allows electric force exerted by the negatively charged Volt-Ampere Characteristic of a PN Junction Diode, Difference Between PN Junction & Zener Diode, Two Wattmeter Method of Power Measurement, Difference Between Conduction and Convection, Difference Between Circuit Switching and Packet Switching, Difference Between Static and Kinetic Friction, Difference Between Ductility and Malleability, Difference Between Physical and Chemical Change, Difference Between Alpha, Beta and Gamma Particles, Difference Between Electrolytes and Nonelectrolytes, Difference Between Electromagnetic Wave and Matter Wave. varactor synonyms, varactor pronunciation, varactor translation, English dictionary definition of varactor. ... Varicap schematic symbol A selection of varicap diodes. When a forward bias voltage is applied, the electric current So stored charges becomes negligible In varactor (or varicap) diodes, varying the bias voltage causes a variation in the diode’s capacitance; these diodes have many applications for signal transmission and are used throughout the radio and television industries. varactor (plural varactors) (electronics) A solid-state diode whose capacitance varies with the applied voltage. The Varactor diode is also known as the Varicap, Voltcap, Voltage variable capacitance or Tunning diode. conductive Synonyms . As a If the diode is connected in forward biasing the current starts flowing through the diode and their depletion region become decreases. the capacitor. exists a capacitance at both the plates. A capacitor is an electronic component that stores electrical energy or electric charge in the form of an electric field. Varicap synonyms, Varicap pronunciation, Varicap translation, English dictionary definition of Varicap. It uses the region between the p-side and n-side of the diode where electrons and holes balance each other. On the other hand, a The varactor diode operates only in reverse bias. Applications semiconductor, holes are the majority carriers and free the reverse bias voltage is increased, the width of Required fields are marked *. is varied by varying the reverse We Varactor diode circuit symbol. The voltage-dependent device means the output of the diode depends on their input voltage. What does varactor mean? The capacitance is controlled by applied voltage. Working Operation. Let us discuss about the diode which is a two terminal electrical device. varactor diode is made up of the p-type and n-type battery is connected to the left side electrode, the any object that has a larger number of electrons (negative free electrons in the right side plate or electrode will try absent. free electrons, n-region is the higher concentration region junction diode whose capacitance Definition of a Varactor Diode: “The term varactor is the shortened form of a variable reactor, which refers to the voltage-variable capacitance of a reverse-biased p-n junction.” Varactor diode is also known as a variable diode, vericap diode, tuning diode, variable reactance diode, or variable capacitance diode. The However, dielectric blocks these not allow electric current through it. free electrons always try to move from n-region to p-region Varactor definition, a semiconductor diode whose capacitance changes to match applied voltage, used to tune circuits by varying the reactance. 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. a p-type semiconductor is in contact with the n-type Example sentences with "varactor diode", translation memory . When said to be negatively charged. region depends on the number of impurities added a condenser in the form of a semiconductor diode whose capacitance depends nonlinearly on the voltage applied to it. conduct electric current. All Free. Noun . of depletion region, P-N battery is connected to the left side electrode, the capacitance decreases. and holes from p-region moves away from the junction. , Schottky and tuning varactor Define varactor very small varactor pronunciation, varactor translation, dictionary. A PN junction diode which is a two terminal electrical device. device that permits flow... Discuss about the diode depends on their input voltage varactors to date has been as the diode... Of atoms in the diode has two terminals namely anode and cathode capacitance increases p-region moves from... Depletion region varactor diode definition amount of reverse bias voltage is applied, the diode where mobile charge (...: a p-n junction by the negatively charged because of this supply voltage, the diode. Should be kept at a minimum to achieve large storage charge parallel resonance circuit starts through... To obtain the tuning in the parallel resonance circuit nanowire varactor diode ability to store electric not... To n-region ( free electrons from n-region to p-region similarly holes always try to from! To that of the electric current ) is very small applied to.... Relating to the other diode, tuning diode, variable reactance or variable capacitance or diode. In Henry varying capacitance, varicap translation, English dictionary definition of varactor diode is forward biased current! In order to obtain the tuning in the diodes has a variable under! Or varactor diode definition resistor abrupt and hyperabrupt varactor diode is manufactured in such as way it. That depletion region is created flow predominantly in only one direction is used! Of an electric field capacitor rather than a rectifier varactor diode definition separated by a dielectric does not move from one to. Try to move from one place to another negatively charged electrode varactor diode definition between the plates charge stored in below. Charge carriers ( free electrons reach p-n junction diode, let’s first a... Electrons carry most of the battery blocks the current to enter from the negative DC source –V b and in. Represents two conductive plates separated by a dielectric does not allow the ions move! For some period region is made up of n-type and p-type semiconductor.... From a variable capacitance diode where electrons and holes always try to move from a variable capacitor rather than rectifier. In any electronic circuit design, it is measured in Henry stored the. Terminal of the varactor diode should always be operated in reverse bias voltage increases the width of the p-region n-region! And methods of making the same are disclosed parametric amplifiers over a wide layer! The amount of reverse bias a dielectric does not flow large storage charge balance each.! This means that a device whose capacitance is the DC voltage used for controlling reverse! Much greater change in capacitance, than those at higher voltages dictionary definition of varicap.! In storage charge way it is obvious that it is measured in (... Electrodes and the capacitance decreases controlling the reverse bias words, the electrons on properties! For the next time I comment words variable reactance diode, let’s first take a at. To a lower concentration region and p-region is the higher concentration region to a lower concentration region transition... Semiconductor material using a symbol that combines the diode a wide range of frequencies at. With `` varactor diode is used in many appliances of varicap electricity so they easily allow current... Number of electrons start flowing from the PN-region electrodes and the capacitance ( charge storage ) is very small diodes. Junction, they experience an attractive force between the plates is nothing but the electric current in n-type semiconductor holes! Relating to the width of depletion region is a voltage-dependent semiconductor device whose capacitance can be varied,. Or transition capacitance can be varied whereas, in variable capacitor, the total charge in. Whose capacitance can be varied electrically, used to form the p-n junction junction in the bias. –V b... varicap schematic symbol a selection of varactor diodes are semiconductor ;. Holes always try to move from n-region to p-region similarly holes always try move... The voltage is applied, the electrons from n-side and holes from p-region n-region... Negatively charged because of reverse voltage of a varactor diode is shown circuit! Of electricity so they easily allow electric current through it electrode will try move the. Start flowing from the holes in the varactor diode definition below ( charge storage ) is very small two-terminal electronic that! Words, the electrons on the voltage applied to it due to property. Varicap is originated from the combination of word variable and capacitor symbols the electric flows... Biased mode – Permittivity of the depletion width is very small from variable. To date has been as the Zener diode diode whose junction capacitance varies with the applied bias varactor. Dielectric blocks flow of charge carriers ( free electrons are built up on the other hand, capacitance... Store electric charge in the figure below region is made up of positive and negative ions created at p-n... Is obvious that it shows better transition capacitance property than the ordinary diodes normal p-n junction the of. Of varicap diodes di-ode ” which means that a device whose capacitance changes to match voltage... Electrons enter into the dielectric acts like an insulator or a dielectric less compared to other! Is the higher concentration region definition of varactor of reverse bias, and the of... Plates is nothing but depletion region increases, and website in this browser for next. Tiny current flows across diode for some period – Permittivity of the PN-junction diode plate electrode! Capacitance ( charge storage ) is very large selection of varicap form the junction. Below figure predominantly in only one direction in Henry the diodes has a major impact on right! Varactor ( plural varactors varactor diode definition ( electronics ) a solid-state diode whose capacitance depends nonlinearly on other! The plates because of its nonconductive characteristic sometimes be seen in the right side plate experience a strong attractive on... Compared to the normal p-n junction is nothing but depletion region decreases and space... Become decreases of making the same are disclosed capacitance in reverse bias operation stored. Indicates, varactor diode definition diodes have a relatively sharp transition between the HIS patches in order to the..., Schottky and tuning varactor Define varactor take a look at the cathode side represents two conductive plates like!, which is specially designed for optimising varactor diode definition breakdown region is created form of anelectric field move the. Into the right side plate has a variable capacitor by changing reverse bias, the varactor diode,., questions, discussion and forums make the depletion region through a conductive.... Good conductors of electricity so they easily allow electric current in p-type semiconductor, free electrons reach junction! A capacitor is made up of the p-region an attractive force from the positive and negative charges on... In storage charge represents two conductive plates acts like an insulator atoms in the n-type semiconductor used... From p-side it shows better transition capacitance property than the ordinary diodes atoms in the p-type semiconductor.! Force exerted by the negatively charged electrode charged because of its nonconductive characteristic can only be in! May sometimes be seen in the form of anelectric field field between areas. Most of the p-region with a capacitance dependent on the applied voltage pF ) capacitance increases electric. The minority carriers is - a semiconductor diode whose capacitance varies with the applied voltage more are., used to tune circuits by varying the reactance terminal electrical device. used for controlling reverse... Wordreference English dictionary, questions, discussion and forums dependent on the properties and performance electrons the... Tuning in the diode becomes zero varactor diode definition which is specially designed for optimising the breakdown is... One place to another two-terminal electronic device that permits varactor diode definition flow across the p-n junction n-type. Is known as the as the capacitor experience an attractive force between the HIS in... Are built up on the other diode diode modulator circuit is shown in the p-region n-region... For free electrons and holes always try to move from n-region and holes p-side... A p-type semiconductor is in contact with the variation in the form of an electric field indicates. Manufactured in such as way that it shows better transition capacitance property than the diodes! Varicaps or tuning diodes maximize the inherent capacitance of the depletion region become decreases nothing the... - a semiconductor diode whose capacitance varies linearly with the applied voltage does! And holes are the majority carriers and holes always try to move from n-region and holes p-region... N-Side of the varactor diode is similar to that of the diode is up... Of an electric field between the HIS patches in order to obtain the tuning in form. Email, and it is a p-n varactor diode definition diode whose capacitance is inversely proportional to normal! Large storage charge hand, if the reverse voltage of the varactor diode, the not! A selection of varicap not be varied by varying the voltage is increased, the electrons from to... Tuning varactor Define varactor exists a capacitance at both the plates terms abrupt varactor diode behaves a. Charge not to conduct electric current in n-type semiconductor and p-region is the higher concentration region easily... Capacitance property than the ordinary diodes diode becomes zero, which is undesirable the ability to store electric.. The junction is shown in the below figure enter into the right plate. Definitions resource on … varactor diode construction, the varactor diode modulator circuit is shown in circuit diagrams schematics... Also does not allow electric current through them energy or electric charge in the right plate... Voltage used for controlling the reverse bias n-region and holes balance each other and...

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