This circuit for a frequency of 40 kHz was found in an old Electronic Design. There were no constructive data for the transformer used in the output.
In the figure we have a typical polarization circuit for MOSFETs with a high impedance...
Obtained in an American documentation from 1976, this circuit has a constant current source for...
This circuit is from a documentation from the 60s. The circuit can be built with transistors like...