In the figure we have a basic oscillator with inverters obtained from TTL, CMOS or other gates. The graph on the side allows to find the frequency depending on the resistor and the capacitor.
This circuit uses a magnetic phone containing 3 germanium transistors. This is a Japanese...
This super metal detector uses three coils, operating in differential form with two transmitter and...
A simple version of VCO CMOS using 4049 inverters is shown in the figure. This circuit can be...