This is another sampling and holding circuit found in a factory manual from the 1980s. The circuit can be implemented with more modern components. The FET is not a common component today.
At that time, practical ideas were interesting, and many can still be used today. In the figure we can...
Pressing S1 the LED glows by a time interval depending on the capacitor. Time intervals in the...
In fact, this circuit transmits a signal rich in harmonics without any tuning and can be picked up in a...