This circuit was obtained from the November 1989 issue of Radio Electronics magazine. The circuit is for motors up to about 1.5 A.
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...