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.
The circuit presented is from the Linear Applications Handbook of the National Semiconductor of...
This circuit was found in American documentation from the 90s. It serves as an amplifier for a...
This high input impedance circuit is suggested by Motorola's 1993 Linear Interface ICs. The power...