This circuit was found in American documentation from the 90's. The transformer determines the output voltage. The transistor must be equipped with a heat sink.
The previous oscillators that use gatesshown in this section, and the 4093 in the basic version,...
This circuit is from a 2005 Linear Technology application manual. The circuit uses a commercial...
This preamplifier for high impedance microphone is designed to make a good addition to the speaked word...