This circuit was found in a 1967 US documentation. The FET is general purpose and the 6V zener. The circuit has a very fast switching action.
Hughes suggests this circuit in a 1968 documentation. The circuit uses old transistors that can be...
This circuit is from an application manual for linear instruments from Texas Instruments. The...
This single-transistor circuit was found in American documentation from the 1980s. The frequency is...