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 was suggested by Philips in 1967 documentation. The circuit receives modulated light and has...
This circuit generates sequence of pulses in order and times determined by the capacitors in pins...
We found this circuit in a 1979 French publication, but it can still be assembled today with...