This circuit provides an output voltage with approximately twice the input using two power transistors and a voltage doubler. The circuit is from a 1970 EDN.
This circuit, found in documentation from the 1980s, uses an operational amplifier from that time....
This low frequency sinusoidal oscillator was obtained in documentation from the 1970s. Operational...
This circuit was found in a 1980s documentation. It is intended for remote vibration monitoring...