This circuit was found in a 1968 General Electric documentation. It has an input impedance of 2 M ohms and excites a load of 16 ohms. The integrated circuit of the time is the PA237.
Audio frequencies in the 300 Hz to 30 kHz range can be measured with this circuit. Transistors allow...
This 2-quadrant modulator circuit was found in the May 1988 issue of Radio Electronics magazine. The...
The frequency of this oscillator depends on the amount of light incident on the LDR. The circuit,...