This circuit obtains phase-inverted signals from a single signal. The circuit uses two LM741 integrated circuits and requires a symmetrical power supply.
To operate with high input voltages using a 3-terminal voltage regulator such as the LM340-15, we...
We found this circuit in the October 1988 Radio Electronics magazine. The circuit is still current...
This audio signal relay was found in an American 1980s documentation. The relay is in accordance...