Varactor Diode Calculator

varactor diode
diode capacitance
cut-off frequency
quality factor
electronic component

Inputs

Outputs

This page provides a Varactor diode calculator as part of a suite of converters and calculators. It helps determine key parameters for varactor diodes.

The calculator computes diode capacitance, cut-off frequency, and quality factor.

EXAMPLE:

INPUTS:

  • Diode capacitance (Cj0) = 100 pF
  • Barrier Potential (Vj) = 0.65 V
  • Reverse bias potential (VR) = -4 V
  • Series resistance (RS) = 12 Ohm
  • Operating frequency (f) = 54 MHz
  • m factor = 1/2

OUTPUTS:

  • Diode capacitance at applied reverse bias (Cj) = 46.4 pF
  • Cut-off frequency (fc) = 286 MHz
  • Q (Quality Factor) = 5.29

Varactor Diode Equation

The following equation or formula is used within the Varactor diode calculator:

Cj = Cj0 / (1 + (VR / Vj))^m fc = 1 / (2 * π * RS * Cj0) Q = 1 / (2 * π * f * RS * Cj)

Varactor diode calculator equation

ESD Suppressor Basics: How They Work

ESD Suppressor Basics: How They Work

Learn the fundamentals of ESD suppressors, their applications in protecting electronic devices, and key features. Includes an example from Littlefuse and a list of manufacturers.

esd
suppressor
circuit protection
Understanding RF Switches: Types and Applications

Understanding RF Switches: Types and Applications

Explore RF switches, essential components for routing RF signals in wireless communication, radar, and satellite systems. Learn about various types and their applications.

rf switch
rf component
signal routing