The Nuts and Bolts of Tuning Varactors

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  • Author: Rick Cory
Many electronic systems must be tuned through the variation of reactance of one or more circuit elements. In these applications it is often desirable to perform this tuning under electronic rather than manual control. Tuning varactor diodes, which are pn junction devices that act as voltage-controlled variable capacitors, can perform this function. This paper describes the construction of tuning varactor diodes, the effects of construction on varactor diode performance, the types of silicon (Si) varactor diodes available and modeling of varactor diodes.
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