This circuit was found in an American 1980s documentation. The transistorized step is the receiver's last IF and the diode is the receiver's existing detector.
This TTL trigger circuit with the 7400 can be used as a signal conditioner in an input shield for...
This circuit can be adjusted between 0.2 and 2 V to trigger with chosen voltages comparing them with...
With this circuit (shield) we can control a load from 500 mA to 1 A, depending on the transistor, using a...