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Definition of "Notch Filter" |
A filter designed to block a specific frequency range or band of frequencies. A band-stop filter [which shows a frequency pass-band graphic]. A notch filter may be passive or an active circuit using an amplifier, in this case an operational amplifier. This circuit example also provides a frequency adjustment using the variable resistor. See Notch Filter Design. / a filter which blocks a narrow band of frequencies and passes all frequencies above and below the band. |
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