This circuit mutes a system when a phone call is received. The circuit is from a Radio Electronics from December 1990.
The components used in this 80's circuit are not common today. The circuit is very sensitive and must...
This circuit is from the 1993 Linear Technology Applications. We can implement the same oscillator...
We found this circuit in a 1967 Electronic Design. The circuit used a MOSFET of the time, which is...