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.
The filter shown in the figure, suggested by Motorola, operates at a cut-off frequency of 1 kHz,...
This circuit uses an unusual operational amplifier nowadays and has a very low consumption. The...
In this circuit R1 has 2M5, R2 and R3 are 5M obtaining a detection current for the diode of 0.5...