This amplifier with gains between 5 and 100 was found in the May 1988 issue of Radio Electronics magazine. The circuit requires a symmetrical power supply.
This circuit is a digitally controlled variable capacitor. We found it in American documentation from...
This is an old 1988 circuit consisting of a timer or time control for exposing silk-screen arrays. The...
Found in documentation from the 90's, this circuit can be implemented based on modern operational...