This circuit was found in a 1970 US publication. Transistors are still common and the circuit can be used as a PWM shield or pulse transmission modulator.
This approximately 100 W PMPO module was found in a technical publication in 1997. The circuit must...
This circuit with transistors was found in an old Japanese publication, translation of an American...
This circuit is based on an operational amplifier that is uncommon today, but that can reach the...