The circuit shown is from National Semiconductor's Linear Applications Handbook. It makes use of the LM78S40 which is not an easy component to obtain today.
This circuit converts sinusoidal signals into squares and can be powered by voltages from 1.5 to 5...
Found in a 1969 Electronic Design, this circuit is intended to power a load up to 300 mA....
This amplifier was published in the July 1961 Radio Electronics magazine. It announced the release of...