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This variable frequency oscillator was found in an old American documentation. Transistors allow more modern equivalents and coil data are found next to the diagram for several frequency bands.
The circuit shown is from the Motorola Linear Databook of 1990. This circuit converts signals in...
In the circuit in the figure, we have the production of rectangular signals with frequencies of up...
This circuit uses a photoransistor to control the frequency for this oscillator. Power supply...