LC Oscillator Based on Colpitts Circuit

This example shows an implementation of a Colpitts oscillator circuit with a nominal frequency of 9MHz. The frequency of oscillation is given by 1/(2*pi*sqrt(L1*C1*C2/(C1+C2))). LC oscillators have good frequency selectivity due to higher Q levels than are achievable with RC oscillators.

Model

Simulation Results from Simscape Logging

The plots below show the output voltage of the LC oscillator based on Colpitts circuit. The lower plot shows the voltage over 1 microsecond so that we can determine the frequency (around 9 MHz).

Related Topics

• Astable Oscillator
• Voltage-Controlled Oscillator with PI Control