This circuit with current up to 100 mA according to the transformer was found in the Radio Electronics magazine of October 1991. The regulation is done directly by the zeners.
This is the traditional configuration for a limit comparator or window comparator, using two...
This circuit is connected to the sum key of a common calculator. Adjusted to produce a pulse per...
This circuit is from a 1980s Signetics documentation. The circuit separates the modulation signal from a...