This circuit was found in a General Electric documentation from 1970. Equivalent transistors can be used. The maximum signal frequency for the indicated components is 250 kHz.
In figure we have a three-phase AC motor control for voltages up to 600 V or 1200 V depending on...
This circuit can drive a white LED from a 3 V supply. The circuit is intended to supply White LEDs...
This application of the RCA integrated circuit released at the time was found in the August 1970...