The figure shows an application of the LM377 in a small inverting stereo amplifier with output powers between 3 and 4 W. The circuit is from a Radio Electronics from April 1990.
Found in a 1967 Electronic Design, this transistorized circuit compresses and then expands a pulse....
This squelch is activated by its own noise, acting automatically. It is used in communications...
This is the battery-powered version of the previous circuit. The circuit is from the same Radio...