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.
This circuit turns on and off from pulses applied to the CLK input. The output 0 goes to the “’1"...
Using the 555 this circuit was found in a Popular Electronics from the 90's. The circuit directly...
We found this circuit in a 1982 documentation. Its outputs must be applied to the input of an...