What is a varactor diode used for?
A varactor diode is a simple variable capacitor that allows oscillator circuits and other circuits to be easily tuned by applying a voltage. These diodes have a similar structure as a p-n diode; the structure of a varactor diode is rather simple and illustrates its power as a component with nonlinear reactance.
What is varactor diode and its working?
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.
What is a diode symbol?
diode, an electrical component that allows the flow of current in only one direction. In circuit diagrams, a diode is represented by a triangle with a line across one vertex.
What are the characteristics of varactor diode?
The characteristics of Varactor diode have the following:
- 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 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.
Which is name for varactor diode?
Varicap
Varactor diode is known by several names as Varicap, Voltcap, Voltage variable capacitance, or Tunning diode.
What is varactor diode and tunnel diode?
It always works in reverse bias condition and is a voltage-dependent semiconductor device. Varactor diode is known by several names as Varicap, Voltcap, Voltage variable capacitance, or Tunning diode. Related Articles: Zener Diode. Laser Diode.
What is a varactor diode give its circuit symbol and one application?
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.
How do you use a varactor diode?
Which best describes how a varactor diode modulator creates FM?
Which best describes how a varactor diode modulator creates FM? The intelligence signal alters the capacitance of the diode to shift the resonant frequency of a tank circuit.