HF Voltage-Controllable Band-Pass Filter Based on Varactor

Sheng Qian Ma; Chang Rong Zhao; Yan Ping Ji

doi:10.4028/www.scientific.net/AMM.631-632.327

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 631-632HF Voltage-Controllable Band-Pass Filter Based on...

HF Voltage-Controllable Band-Pass Filter Based on Varactor

Abstract:

Varactor to replace commonly variable capacitance is applied to the tuner. This paper presents the voltage-controllable band-pass filter design method. The filter constitutes of operational amplifier, resistors, varactor MV209 and parallel LC resonant circuit. Center frequency range of the band-pass filters is from 19MHz to 25MHz controlled with DC voltage. It derives the transfer function of the filter and function expression of junction capacitance with reverse voltage. The frequency response of filter simulation and experimental results are given. Key words: Varactor; Band-Pass Filter; Voltage-Controllable Filter; Junction Capacitance

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Periodical:

Applied Mechanics and Materials (Volumes 631-632)

Pages:

327-332

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.631-632.327

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Online since:

September 2014

Authors:

Sheng Qian Ma, Chang Rong Zhao*, Yan Ping Ji

Keywords:

Band-Pass Filter, Junction Capacitance, Varactor, Voltage-Controllable Filter

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