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#147: Basics of Varactor Diodes | Voltage Controlled Oscillator VCO Example

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Published on May 11, 2014

This tutorial presents the basics of the varactor diode, or varicap diode, and describes how it functions as a voltage controlled capacitor. A test fixture is shown and used to measure the capacitance vs. reverse voltage. Finally, a voltage-controlled oscillator circuit is built and measured, showing how the voltage on the varactor diode is used to tune the frequency of the VCO. Notes from the video are here:
http://www.qsl.net/w/w2aew//youtube/V...

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