Found in a 90’s HAM Radio, this circuit is used for an optical communications system or even audio transmission by optical fiber. The components are common.
The integrated circuit is from the time. This low-power circuit was found in the April 1973 issue...
This small amplifier, close to 1 W, was found in a 1963 documentation. The class B circuit uses...
This source of constant current was obtained in an American documentation of 1973. The transistors can be...