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Voltage controlled oscillators
Home » Industrial Equipment » Electronic Components » Voltage controlled oscillatorsA voltage controlled oscillator is an oscillator that has a special diode as its main element. This diode works differently than normal diodes in that reacts to changes in voltage or frequency. This change is measured in capacitance. Capacitance is the ability of capacitors to hold electric charges until the capacitor discharges. In a voltage controlled oscillator, the special diode or varactor diode changes with a change in voltage to the point where charges become stored in the diode until a certain frequency or voltage limit is reached. This is why it is called a voltage controlled oscillator.
In circuits that don’t use a VCO, the only way to have a pure circuit would be to use a voltage source that is stable and clean, a varactor diode, and a potentiometer. However, this is not always practical so a VCO is used instead.
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