Found in American documentation this circuit uses transistors of the time. The circuit can be made with current components. It works as a trigger working with 600 ohm signals.
This circuit with a few watts of power was found in the April 1995 issue of Electronics Now...
This circuit was found in a 1967 US publication. In it we have the implementation of a ring...
The purpose of this circuit is to monitor the output voltage of a power supply. The under and over...