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.
This high frequency or RF amplifier was found in a 90s Popular Electronics. The circuit can be...
The circuit illustrated in Figure allows external loads (8) to be driven from parallel port...
This circuit was obtained in a1969 magazine. The magazine no longer exists, but the circuit can be...