This circuit was found in a 90s EDN. Its purpose is to increase the efficiency of operational amplifiers. Power MOSFETs and inverted zeners support equivalents.
May 2017 - Mouser Electronics announces the availability of new Toshiba SSM6K N Channel MOSFETs...
Using integrated circuits from the time, we found this audio compressor in an English publication from...
The 2009 project is based on the integrated circuit9 LM317T, an adjustable regulator with 3...