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| Created | March 16, 2026 |
| Last modified | 1 hour, 33 minutes ago |
| Tags | notch-filter |
Notch Filter with Adjustable Q
Notch filter with adjustable notch depth and bandwidth; as affected by the circuit's Q-factor. Circuit involves only a single control, for adjusting Q value. Design equations and other information given with the diagram. Useful for attenuating a hump or peak in an op-amp circuit's frequency response curve. Power-supply not shown. Requires a regulated single-polarity DC suppl providing +-9VDC or +-12VDC or +-15VDC at >= 20 mA of current. Breadboard test circuit before committing to soldered build.
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