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Easily_tuned_notch_filter

2017-02-12 08:14  
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Easily_tuned_notch_filter
This circuit uses two LM107s to form a tunable notch filter. The notch frequency is set by adjustment of C1. The frequency range is determined by the values of R4,C1, and C2, as shown by the equation. National Semiconductor, Linear Applications Handbook, 1991, p. 95.