Design of IIR digital notch filters

A method is presented for the design of notch filters with specified notch frequency Ω^sub 0^ and 3-dB rejection bandwidthB^sub t^, using a first-order real all-pass filter, wherein the only coefficient is used to control the notch frequency. To control the bandwidth, use is made of a new amplitude...

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Veröffentlicht in:	Circuits, systems, and signal processing systems, and signal processing, 1997-07, Vol.16 (4), p.415-427
Hauptverfasser:	JOSHI, Y. V, DUTTA ROY, S. C
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Electric, optical and optoelectronic circuits Electronics Exact sciences and technology Receivers & amplifiers Theoretical study. Circuits analysis and design
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	A method is presented for the design of notch filters with specified notch frequency Ω^sub 0^ and 3-dB rejection bandwidthB^sub t^, using a first-order real all-pass filter, wherein the only coefficient is used to control the notch frequency. To control the bandwidth, use is made of a new amplitude change function (ACF), and it is shown that given notch filter specifications can be exactly met thereby. Also, using the ACF, it is shown that stability of the second-order notch filter designs can be improved along with the noise gain.[PUBLICATION ABSTRACT]
ISSN:	0278-081X 1531-5878
DOI:	10.1007/BF01198059