This is a circuit suggested by Linear Technology in a 1980s documentation. The integrated circuit is from the era. Observe the input and output voltage.
This audio circuit has an output power of 1 W. We found it in the Radio Electronics magazine of...
This circuit was obtained from Linear Technology documentation from the 90's. The circuit uses...
Found in Unitrode documentation from the 1980s, this circuit makes use of PUTs, currently common...