Found on a 1969 EDN this circuit switches a current from a digital control signal. The impedance of the circuit ON is approximately 10 ohms. Modern equivalent transistors may be used.
Radio Electronics published this circuit in a 90's edition. The circuit makes use of an uncommon...
This circuit had its assembly described in a Radio Electronics from March 1963. The circuit uses 2...
This stage can be used in power supplies to increase the current capability up to 10 A. The...