This silencer or squelch preamp circuit was found in a documentation for radio amateurs. It completely mutes the circuit when there is no sound picked up by the microphone.
This circuit uses an unusual component today which is the integrated circuit. We found this...
This circuit was found in an old American documentation. The operational used is of the...
In figure 1 we have an application for NLAS5113, a new device from On Semiconductor...