variable-bandwidth filter

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variable-bandwidth filter [′ver·ē·ə·bəl ¦band‚width ‚fil·tər]

(electronics)

An electric filter whose upper and lower cutoff frequencies may be independently selected, so that almost any bandwidth may be obtained; it usually consists of several stages ofRCfilters, each separated by buffer amplifiers; tuning is accomplished by varying the resistance and capacitance values.

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