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.
Using 4 operational amplifiers this circuit generates 4 different tones. The circuit is from an...
Found in a 90s Electronic Design, this circuit produces adjustable pulses that start after an...
This resistive sensor was found in a 1969 US documentation. The circuit uses transistors of the...