Found in na 1980’s English magazine, this circuit produces a strong modulated tone reproduced on a speaker. The power MOSFET can be of almost any type.
With this circuit it is possible to obtain an AND gate with large fan-in, using an operational...
This circuit was found in an American 1980s documentation. The integrated circuit used is uncommon...
This configuration appears elsewhere on this site. We obtained it from a 90s Radio Electronics, based...