This configuration can be applied to other operational amplifiers to increase the current capacity. The circuit is from the 80s. The transistors used are from that time.
This circuit is from an 80's electronic component manual. It has the way to simulate an inductor...
This is the receiver for the previous circuit found in the November 1991 Radio Electronics...
This circuit was found in a Popular Electronics documentation from the 90s. It is possible to switch...