# Reactance Modulator Calculator

BJT Reactance Modulator Calculator
Inputs:

BJT Reactance Modulator Calculator

A reactance modulator works by changing the impedance of an oscillator circuit. When a voltage is applied to the circuit, it changes the reactance of the circuit, which in turn changes the frequency of the oscillator. Thus, a reactance modulator can be used to change the frequency of an oscillator. The above online BJT Reactance Modulator Calculator helps you to calculate the capacitor value, resistor value and equivalent capacitance of a BJT transistor based reactance modulator.

Equations Used:
$$C_{eq} = g_mCR$$
$$C=\frac{1}{n 2 \pi f R}$$
$$X_c = nR$$(Xc>>R)
FET Reactance Modulator Calculator Calculator
Inputs:

About FET Reactance Modulator Calculator

The above online FET Reactance Modulator Calculator helps you to calculate the capacitor value, resistor value and equivalent capacitance of a FET transistor based reactance modulator.

See the detailed tutorial on using the calculator for the designing JFET based reactance modulator.
Equations Used:
$$C_{eq} = g_mCR$$
$$C=\frac{1}{n 2 \pi f R}$$
$$X_c = nR$$(Xc>>R)