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.
This circuit is from Popular Electronics from the 90s. The integrated circuit is not very common...
The operational amplifier using this 80's circuit is a double 741 of the time. The circuit may be...
This 12.5 W quasi-complementary amplifier was found in a 1969 General Electric publication. Note the high...