This tone control was obtained in the Audio Handbook of the National Semiconductor of 1977. The circuit controls the signals of medium frequencies in a wide dynamic range as shown in the diagram.
This is yet another version of the light-controlled oscillator that can be found on this website. This...
Found in the September 1992 issue of Radio Electronics magazine. This circuit generates pulses that...
We found this circuit in an American publication from the 80's translated into Portuguese. The...