This transistor curve tracer was described in a December 1969 Radio Electronics article. It consists of a ladder-type signal generator that applies stepped voltages to the transistor under test.
We found this circuit that warns when the gate of a house is opened in an old documentation,...
This circuit was found in a 90s Electronic Engineering. The quadruple operational amplifier can be...
This tone control was obtained in the Audio Handbook of the National Semiconductor of 1977. The...