This circuit was found in a 90s EDN. In it we have the use of LEDs and diodes to stabilize the supply voltage of a CMOS load.
This circuit for alternating current was found in a 1965 General Electric documentation. The...
We found this circuit in a Poptronics from the 90's. Equivalent operational amplifiers can be...
We found this configuration in a 70s American documentation. The circuit makes use of operational...