This simple low current circuit was found in a Radio Electronics magazine from August 1960. The circuit does not use transistors in regulation, but only zeners directly.
The circuit shown in the figure is indicated for medical applications where the sector in contact...
This circuit, from an American publication of 1974, provides a 0.005% regulation with a variation of...
The configuration shown is from a Texas Instruments optoelectronics manual. The circuit can be...