This circuit of a few watts of power shows a typical configuration from the 70s using driver and output transformers. Output transistors must use a heatsink.
This circuit is a driver for R-2R network of AD converters. We found it in manufacturer...
This circuit was found in an American publication from the 60's. The transistor is made of...
This circuit produces an audio tone on the speaker or magnetic capsule. Rx must be such that added...