A VCXO (Voltage Controlled Crystal Oscillator) is a crystal controlled oscillator where the frequency changes in direct proportion to the application of a control voltage. In all VCXO's the type of modulator employed is a varactor diode. The varactor diode is a semiconductor device that is designed to act as a variable capacitor when a voltage is applied to it. When used in series with a crystal, changing the control voltage causes the diode capacitance to change. This change in capacitance causes the total crystal load change and subsequently causes a change in crystal frequency. This change in frequency is known as deviation.

As new types and/or new ranges of oscillators are developed HM International is continuously involved in custom design. Should you have a requirement our team of engineers will be pleased to discuss your requirement with you.

Product Information

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Glossary of Oscillator Terms

We offer a summary of the terms used to describe oscillator specifications. Click here