We found this parallel regulator in a 1973 publication. Transistors admit equivalents and the output voltage can be modified by changing the zener.
This circuit is from the 1982 SGS linear integrated circuit manual. The LS776 is not common today,...
This circuit was obtained in an old English magazine from 1976. However, the components can still...
In the figure we have a simple way to obtain (almost) sinusoidal signals from an integrated...