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.
We found this circuit in a publication on operational amplifiers from 1978. The circuit is made...
This circuit was found in a Philips documentation from 1970. The components are of the time,...
Found in a 1967 documentation this circuit can be applied to any operational amplifier. Components...