The purpose of this circuit is to silence the hiss that exists between the stations on an FM receiver. The circuit was found in American documentation from the 1980s.
This low frequency square wave oscillator using the 741 Operational Amplifier produces sound when...
The integrated circuit of this instrument is not common today. Equivalent operational can be...
For analog lines, this circuit was found in the August 1994 issue of Electronics Now magazine. The...