This circuit was found in a 1980s Intersil documentation. The integrated circuit used is not common today. The power supply must be symmetrical.
This 0.5W amplifier was found in a publication of the 1980s. The output transistors can be the...
This configuration was found in old documentation and is valid for most general purpose NPN...
This SCR circuit was found in an American 1980s documentation. The circuit is still current,...