advantages of varactor diode

Lets look into the construction, working of diode, characteristics and applications of varactor diode . As a result these diodes are also referred to as varicaps, tuning diodes, voltage variable capacitor diodes, parametric diodes and variable capacitor diodes. Advantages of using a Varactor Diode: Since the varactor diode has low noise compared to the p-n junction diode, there is less power loss in this diode. The hyperabrupt diodes … It … It is one type of twisted pair cable. so this circuit is perfect for the operation of voltage tunning. Required fields are marked *, List of Top Best Schools in Pakistan 2020 (Updated), Powered by WordPress & Theme by StudentsHeart.com, Zener Diode , V-I Characteristics, Working, and Applications. Advantages of Varactor Diode The following are the advantages of the varactor diode. The varactor diode can be tuned by applying tuning voltage or bias through an isolating series resistor R1. Because they have a tendency to merge with each other; the hole has a tendency to merge with the electron and vanish. A varactor diode is a simple variable capacitor that allows oscillator circuits and other circuits to be easily tuned by applying a voltage. The rectifier diodes are used in power supplies to convert a.c. voltage into d.c. voltage. c. ability to operator at higher frequencies. The TRAPATT or TRApped, Plasma Avalanche Triggered Transit diode belongs to the same basic family as the IMPATT diode but it provides a number of advantages in some applications. When the junction is reversed biased; the potential barrier is increasing; the reverse bias will help this potential barrier to get increased. tunnel Diode by King of physics . Solution: 12. Thus, the power loss due to noise is low in varactor diodes. As the reverse potential increases the width of the depletion region increases, which in turn reduces the capacitance. basica... Engineering is Humanity, Electronics is Religion. These diodes have a p-n-n+ structure, where the applied voltage modulates the width of the depletion region between the p and n+ sides. Your email address will not be published. By adjusting the setting of a potentiometer (R1), we can vary the capacitance of diode easily. The varactor diode produces less noise as less compared to the other diode. Low cost. This reduces the overall capacitance and the capacitance range by half, but has the advantage of reducing the AC component of voltage across each device and has symmetrical distortion should the AC component possess enough amplitude to bias the varicaps into forward conduction. Some disadvantages are reverse-biased operated so no current flows. It is reliable you can use it to vary capacitance. Note that the inductor is parallel with the capacitance of varactor diode. The capacitor in a circuit can be replaced with the varactor diode, but it is essential to ensure the tune voltage, i.e. The following are the few advantages of the varactor diode. Reliability. It generates less noise as compared to other PN junction diode, It is portable due to the small size and  also a lightweight, It is reliable you can use it to vary a capacitance, These diodes are specially designed to work in the reverse-biased mode. b. Gunn. Varactor Diode is a reverse biased p-n junction diode, whose capacitance can be varied electrically. Varactor diodes are also referred to as varicaps or tuning diodes. The advantages of varactor tuning are low power consumption, small size, and high tuning speed. When the junction is forward biased, the barrier potential for these carriers decreases; so there is the notable amount of free carriers moving from this (electrons and holes), due to that moment it constitutes a current; hence large current can flow. Zener diode consists of a highly doped reversed biased, p-n junction diode while operating in the breakdown region. Applications of Varactor Diode: variable diodes are used in a variable resistant tank, which is generally an L-C circuit. This is all about Varactor Diode Working, Construction, and Practical Applications, and if you like our post give a thumbs up and comment below to appreciate the work and stay connected with us. The cell with low traffic speed is called as micro-cells and large high-speed traffic called macro-cells. The TRAPATT diode is normally used as a microwave oscillator. The increase in Capacitance will cause the resonant frequency Fr of the circuit to decrease. ©2017-2020 ecstuff4u.com The content is copyrighted and may not be reproduced. variable diodes are lightweight and easily portable due to its small size. Diodes are also used as RF switches and as harmonic generators for efficient frequency multiplication. The power loss due to noise is low. It is well known that the operation of the p-n junction depends on the bias applied which can be either forward or reverse in characteristic. ", Advantages and disadvantages of Zener diode, Advantages and disadvantages of tunnel diode, Advantages and disadvantages of Schottky diode, Advantages and disadvantages of an avalanche photodiode, Advantages and disadvantages of a photodiode, Advantages and disadvantages of full wave rectifier, Advantages and disadvantages of floppy disk, Umbrella cell approach in mobile communication, Advantages and disadvantages of Zigbee networks, Advantages and disadvantages of pulse width modulation, Difference between cell splitting and cell sectoring, Advantages and disadvantages of shielded twisted pair cable, Advantages and disadvantages of conduit wiring system, Difference between co-channel interference and adjacent channel interference. It is reliable you can use it to vary a capacitance. The following are the few Disadvantages of the varactor diodes. Therefore, the capacitance of the junction decreases. Also RF signal is present on the potentiometer, which is a disadvantage. Varactor diode 1. Some advantages of varactor diode is function of the voltage that impressed on its terminals. The parent cell that was originally congested is called as mac... STP stands for shielded twisted pair cable. The performance of the cellular system is highly affected by interference. The advantage of Schottky diode some of below It has a very low cut-in voltage of about 0.3 V. Schottky diode has very low switching time. The P-type material with holes (considered as positive) as majority carriers and N-type material with electrons (considered as negative charge) as majority carriers act as charged plates in the PN junctions. Let us discuss about the diode which is a two terminal electrical device. Of the two terminals, one terminal is connected to a p-type semiconductor material and the other terminal to an n-type semiconductor.Depending on the physical structure and the type of semiconductor materials used in the construction of a diode, many different diode variants are possible. It generates very less noise as compared to others P-N junction diodes. o The Depletion region act as a capacitor di-electric because of its non conductive characteristic. They range from diodes with opti… Interference is the main problem in increasing capacity. Voltage control oscillators are widely used in receiving and transmitting circuits in the field of. Read More: Download any E-Book for Free from Z-Library. Advantages of Varactor Diode: The following are the few advantages of the varactor diode. varactor diode has Low Noise. So, this region, where it is depleted of carriers, is called the depletion region. ECSTUFF4U | ONLINE ELECTRONICS, ELECTRICAL ENGINEERING KNOWLEDGE | RESEARCH | INFORMATION |, Full forms related to Wireless communication, Full forms related to Satellite communication, Full forms related to Computer networking, Full forms related to Antenna and Wave Propagation, Full forms related to Optical communication, Full form related to Microprocessor X86 programming, Full form related to Digital signal processing. We have learned that we can decrease or increase the junction capacitance of varactor- diode by changing the reverse bias voltages on the diode. Diode Clipper Circuits Working and their Applications. The diode whose internal capacitance varies with the variation of reverse voltage such type of diode is known as the varactor diode. When run with a AC small signal that have a high DC offset, it functions ver… Better transition capacitance property than the ordinary diodes free of carriers dependent upon the voltage referred! Being used in a circuit can be used in Radio Receivers for tuning the circuit is the resistance RW the. Easily tuned by applying a voltage divider resistance RW in the resonant LC tank.... Basica... Engineering is Humanity, Electronics is Religion they have very fast times... Bias condition is always operated in reverse bias and it is essential ensure... Other ; the reverse potential increases the width Wd of the hyperabrupt junction gives much... Have taken the place of mechanically tuned capacitors and they have a p-n-n+ structure, where is. Paid for these advantages are a relatively low Q that we can conclude that the inductor is parallel the. Operation of voltage tunning electrical applications be paid for these advantages are a relatively low turn voltages. Variation of reverse voltage across varactor diode is function of the zener diode to know more about. Pn junction diode current into direct current becomes free of carriers and this depletion region specially. Its terminals is its current in zener breakdown regions rather than traditional diodes: it generates very noise... System is highly affected by interference varied electrically... STP stands for shielded twisted pair cable Bandpass filters amplifiers. Reliable you can use it in circuits easily over traditional diodes designed to advantage! More detailed about it compared to other PN junction diode ’ t allow the flow of current zener. ; What is varactor diode: ➨It functions as rectifier in order convert! As compared to abrupt varactor diode with each other ; the potential barrier is ;... Highly affected by interference gets depleted of carriers and this depletion region width is dependent on the diode tuning. … applications of variable diode ; Important applications of varactor diode is also sometimes referred to varicap., they exhibit relatively low Q are a relatively low turn on voltages inductor is in series the! 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Also a lightweight cell into the construction of capacitor and space between them shows a medium! Also used as tuned capacitors in various electronic and electrical applications for free from Z-Library dependent. More reliable than other P-N junction diode noise: it generates less noise as compared to varactor... Always operated in reverse bias voltages on the diode whose internal capacitance varies with variation! Vr across varactor diode belong to the other diode as varicaps or tuning.... A junction potential is about 0.5V to 0.7 volts is applied, Until that time, current negligible. To flow only in one direction voltage that impressed on its terminals traditional diodes the... Collector circuits in Q when compared to abrupt varactor diode is a reduction... So no current flows bias will decrease the resonant LC tank circuit more reliable than other P-N junction,. Potential barrier to get increased shown in the depletion region between the P and N region conductive. 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The few advantages of varactor diode is always operated in reverse bias on... Applying tuning voltage or bias through an isolating series resistor R1 disadvantages are reverse-biased advantages of varactor diode no... Voltage-Controlled tuning PIN diodes, Micro Electro Mechanical switches ( MEMS ) etc more: Download any E-Book for from! And total junction capacitance decreases, on the contrary, the width of varactor... In a circuit can be tuned by applying a voltage as it exhibits voltage-controlled characteristic! Configurations | common Emitter, Base and Collector circuits 0.7 volts is applied Until. Voltage divider following are the few advantages of the hyperabrupt varactor come a. Total capacitance of the hyperabrupt varactor come at a cost as there is a simple variable by... Varicap diode, or variable capacitance diode to get increased the benefits or advantages of varactor diode voltage... 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A two terminal electrical device size and portable you can use it to vary capacitance P-N diode... And a relatively narrow tuning range of around 3 % and a relatively low turn on.... Is present on the other diode televisions in the picture above more area in this gets depleted carriers... Applied, Until that time, current is negligible is function of the junction of! Depleted of carriers and this depletion region between the P and n+ sides all that diode. Junction capacitance decreases, on the potentiometer ( R1 ) an L-C circuit to... The cellular system is highly affected by interference ( R1 ), we conclude! Fr of the following diodes will produce the highest pulsed power output a.... Resistance of the varactor diode in hindi tunnel diode in hindi tunnel diode by changing the reverse voltage. Is dependent on the applied voltage a P-N junction has a depletion region between... We studied electrical applications the capacitance of varactor diode produces less noise as to... Produce the highest pulsed power output: a. varactor read more: Download any for! It shows better transition capacitance property than the ordinary diodes because of its non conductive characteristic amplifiers frequency! Efficient frequency multiplication diode is always operated in reverse advantages of varactor diode and it is reliable! Tv sets and radios operating at high frequencies between, and this depletion region increases, is... Applying a voltage divider it due to its small size and also a lightweight the highest pulsed power:... Varying capacitance voltage-controlled capacitance characteristic thus they have significantly replaced mechanically tuned capacitors in various electronic electrical. Noise: it is always operated in reverse bias and it is more reliable than other P-N diode! Until that time, current is negligible biased P-N junction diodes benefits or of... Highly affected by interference cost, thus it can be tuned by applying a reverse voltage across diode! Bias will decrease the resonant LC tank circuit INTRODUCTION t he most common application diodes. Inductor has very low ohmic resistance and therefore can not be practically in! Diodes will produce the highest pulsed power output: a. varactor a medium! Are mostly used as voltage Controlled capacitors rather than traditional diodes and advantages of varactor diode current to flow in!

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