Varactor Diode Calculator

Varactor Diode Calculator calculator can be used to calculate the capacitance, reverse bias voltage, and other parameters of a varactor diode based on given parameters.

Input Parameters

Calculation Results

Calculation Formula

Capacitance (Cj) = Cj0 / (1 + m * (Vr - Vf))

Where:
Cj = Capacitance at given bias voltage (pF)
Cj0 = Zero bias capacitance (pF)
Vr = Reverse bias voltage (V)
Vf = Forward bias voltage (V)
m = Ideality factor

Results

Capacitance (Cj) (pF):

Varactor Diode Calculator Calculator Usage Guide

Learn how to use the Varactor Diode Calculator calculator and its working principles

How to Use the Calculator

  1. Enter the pin type (PIN or PINV).
  2. Enter the reverse bias voltage (Vr) in volts.
  3. Enter the forward bias voltage (Vf) in volts.
  4. Enter the zero bias capacitance (Cj0) in picofarads (pF).
  5. Enter the ideality factor (m).
  6. Click the "Calculate" button to compute the capacitance (Cj) at the given bias voltage.

Working Principle

The capacitance of a varactor diode changes with the applied voltage. The formula used to calculate the capacitance at a given bias voltage is:

Cj = Cj0 / (1 + m * (Vr - Vf))

Where:

  • Cj is the capacitance at the given bias voltage (pF).
  • Cj0 is the zero bias capacitance (pF).
  • Vr is the reverse bias voltage (V).
  • Vf is the forward bias voltage (V).
  • m is the ideality factor.