Found in a 1980s telecommunications documentation, the circuit presented acts as a product detector. The modulator or mixer in the square may be that of the previous circuit.
This circuit is intended to increase the width of a pulse. The circuit is TTL and can be used as a...
This circuit was found in a 1966 EEE. What it does is it converts the logic levels of 0 V and +4 V...
This circuit open and close the relay in intervals adjusted by the potentiometers. The capacitors...