VK3YE amateur radio pages

1 kHz Audio Oscillator

 

All material on this site (c) Peter Parker VK3YE
1997-2013.

Material may not be reproduced without permission.

 

 

 

This circuit consists of a CMOS square wave oscillator on a frequency of approximately 1 kHz.

The RC filter, which has a roll-off frequency of 500 Hz, filters the harmonics, providing a sine-wave output.

The oscillator has many uses; sidetone circuits in transmitters and signal injectors for audio tests are just two.

circuit of oscillator