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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Transverse grating-assisted narrow-bandwidth acousto-optic tunable filter

E G Paek, J Y Choe, T K Oh

    Optics Letters
    |December 19, 2007
    PubMed

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    Active Filters01:25

    Active Filters

    Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is: