This circuit generates a constant current given by R1. The load is on the high side of the feed (High Side). The circuit admits equivalent operationals and the source must be symmetrical.
This stage of low power audio amplification was very common in devices powered by the 60's and...
This different circuit was found in a Radio Electronics from August 1965. It works with a voltage of...
This circuit was found in a 1980s documentation from the manufacturer of the integrated. The...