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 found in a 1997 magazine. It uses a CMOS 4060 circuit powered by 12 V which is...
This circuit is from the Motorola Linear Databook of 1990. The values of the components depend on the...
This circuit uses a FET and a BJT to give a x300 gain for the input signal. So a 50 mV signal at...