This circuit, published in the 1980s, can be applied to operational amplifiers of almost any type. The power supply must be symmetrical.
We found this circuit in a Radio Electronics magazine from June 1992. The circuit has a power...
This low power circuit for the FM band was found in a spy book from the 90s. The tunnel diode is...
This circuit is from a documentation from the 70s. The circuit uses logic gates of the time, which...