This circuit indicates the logical level of a CMOS circuit, extracting the power from the circuit being analyzed. The circuit is from an American magazine from the 90s.
This circuit was originally recommended to operate with the emitter of the previous circuit but...
We found this circuit in the 1989 Radio Electronics Experimenter. The circuit uses common...
The power supply shown in the figure provides voltages between 0 and approximately 15 volts, with...