What is a main feature of a varactor diode?

Characteristics of Varactor Diode These diodes significantly generate less noise compared to other diodes. The cost of these diodes is available at lower and more reliable also. These diodes are very small in size and very lightweight. There is no use when it is operated in forwarding bias.

What is varactor diode what are its applications draw and explain the relation between capacitance and reverse voltage?

A varactor diode is a p-n-junction diode, in which internal capacitance can be altered as a result of the application of reverse bias voltage. Diodes are two-terminal devices, they are mainly used to protect electronic circuits by controlling voltage and also by transforming AC to DC.

How does a varactor diode work?

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. The P-N Junction diode creates capacitor effect. The capacitance is controlled by applied voltage. It works on reverse biased mode.

Which of the following is one of the suitable application of varactor diode?

Owing to the special property of varying capacitance with varying voltage, varactor diodes are mostly used in frequency modulation or tuning circuits where the value of capacitance determines the output modulation frequency.

Which is name for varactor diode Mcq?

Varactor Diode MCQ Question 6 Detailed Solution It is also called a voltage variable capacitor or “vari-cap” or “ volta-cap” Varactor diode works on Transition capacitance.

What diode is used in radio?

germanium diodes (or sometimes Schottky diodes) are used instead of silicon diodes, because their lower forward voltage drop (roughly 0.3 V compared to 0.6 V) makes them more sensitive.

What is varactor modulator?

Varactor diode modulator is the direct method of FM generation wherein the carrier frequency is directly varied by the modulating signal. Varactor diodes are used along with reactance modulator to provide automatic frequency correction for an FM transmitter. The varactor diode modulator circuit is shown in Fig5.

How varactor diode is different from pn junction diode?

Operation of Varactor Diode The junction capacitance of a p-n junction diode is inversely proportional to the width of the depletion layer. This ability to get different values of capacitances just by changing the voltage applied is the biggest advantage of a varactor diode when compared to a normal variable capacitor.

Where is varactor diode used?

Varactor or varicap diodes are used mainly in radio frequency or RF circuits to provide voltage controlled variable capacitance. These electronic componenta can be used in a whole variety of ways where a capacitance level needs to be controlled by a voltage.