This old configuration of an audio amplifier has a push-pull two-transistor output stage. Output power is low and the critical components are the transformers. The circuit was found in an 1958’s publication.
The current of this source is 200 mA at the most, and the output depends on the zener that may...
This peak detector has a memory to prolong the response. The circuit is from American...
The circuit in the figure uses the four current amplifiers of the LM3900 to generate a sawtooth signal...