✔ Varactor Diodes Working

Varactor Diodes Working

- August 01, 2019

The basic working of a varicap or a varactor diode can be understood with the following explanation. Varactor diodes are commonly found in communication equipment where electronic tuning is a necessity.

Varactor Diode Working Characteristics And Its Applications

Varactor Diode Frequency Multiplier And Tuner Application

Varactor Diode Lessons Tes Teach

When a varactor or varicap diode is applied with a rising reverse bias potential results in an increase in the depletion width of the device which in turn causes its transition capacitance to decrease.

Varactor diodes working. 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 dependent capacitance of a reverse biased pn junction. These diodes are available at low costs. 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.

There is no useful purpose of varactor diode operated when it is operated in forward bias. The p n junction diode creates capacitor effect. Working of varactor diode as we have already discussed that the varactor diode is a reverse biased device.

That means the operation for which it is specified is noticed in a reverse biased condition rather than forward biased. Varactor diodes produces considerably less noise compared to other conventional diodes. The junction capacitance is inversely proportional to the width of depletion layer ie.

The varactor diodes are small in size and hence they are very light weight. Likewise if the reverse voltage of the varactor diode is decreased then the size of the depletion region decreases. Working of a varactor diode the volume of the depletion region of the diode varies with change in reverse bias.

A varactor diode is specially designed to enhance this ability to store charge carriers when reverse bias is applied thus allowing it to act as a capacitor. 1 applications 2 operation. Varactor diodes are more reliable.

Before going to varactor diode lets first take a look at the capacitor. If the reverse voltage of the diode is increased then the size of the depletion region increases. If the width of depletion layer is less the capacitance will be more and vice versa.

Varactor diode is a p n junction diode whose capacitance is varied by varying the reverse voltage. They are an important component of radio frequency or rf applications.