We found these circuits in a Popular Electronics from the 90s. The circuit has a simple low power version and a higher power version with MOSFET (VMOS) of the time.
This RF and audio follower applies its signals to a small amplifier. The FET can be any...
This circuit was found in an American documentation from 1968. The circuit uses transistors from that...
This integrated contains a Class B circuit originally developed to provide 6 W in a car radio...