This squelch circuit is placed at the input of the single receiver audio amplifier stage. Its purpose is to silence background noise. The circuit is from an 80's documentation.
aaa The circuit shown generates 100 kHz signals for calibrating the scale of a receiver in 100 to...
Found in a 1964 magazine, this is a small headphone amplifier from 500 ohms to 10 k ohms (magnetic...
This circuit can use common operational amplifiers according to the supply voltage. One suggestion...