✔ Varactor Diode Working Principle

Varactor Diode Working Principle

- May 22, 2018

Varactor diode is a reverse biased p n junction diode whose capacitance can be varied electrically. The word varicap is originated from the combination of word variable and capacitor.

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Before going to varactor diode lets first take a look at the capacitor.

Varactor diode working principle. Here you will learn how the varactor diode acts as a variable capacitor and how. To learn how a varactor diode works you need to first understand the working principle of a variable capacitor. A capacitor consists of two conducting surfaces separated by a non conducting dielectric medium see figure below.

The varactor diode also called a varicap tuning or voltage variable capacitor diodeis also a junction diode with a small impurity dose at its junctionwhich has the useful property that its junction or transition capacitance is easily varied electronically. Working of a varactor diode. The p n junction diode creates capacitor effectthe capacitance is controlled by applied voltage.

To know the varactor diode working principle we must know the function of capacitor and. And at one end this diode is inbuilt with two lines that specify the capacitor symbol. The symbol of the varactor diode looks like a common pn junction diode that includes two terminals namely the cathode and the anode.

Varactor diode is a p n junction diode whose capacitance is varied by varying the reverse voltage. The diode whose internal capacitance varies with the variation of the reverse voltage such type of diode is known as the varactor diode. 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.

It is well known that the operation of the p n junction depends. It works on reverse biased mode. Varactor diode operation and characteristics.

It is used for storing the charge. A varactor diode is a pn junction diode that is especially operated in reverse biased mode. As a result these diodes are also referred to as varicaps tuning diodes voltage variable capacitor diodes parametric diodes and variable capacitor diodes.

To understand the working principle of the varactor diode we must know what is a capacitor and how can we change the capacitance. Let us consider the capacitor that consists of two plates separated by an insulating dielectric as shown in the figure. The varactor diode always works in reverse bias and it is a voltage dependent semiconductor device.

It is a device whose capacitance changes with the variation in the applied reverse bias potentialit is also known as varicap or voltcap. This video describes in detail what is a varactor diode structure of varactor diode and working of varactor diode.