LOW FREQUENCY DIGITAL NOTCH FILTER

LOW FREQUENCY DIGITAL NOTCH FILTER

A low frequency digital notch filter (fig.l) comprising two sub-filters - an all-pass-network filter (l) and a T-section filter (3) with a feedback connection from the T-filter to an input node (3l), and feed forward connection from this input node to a terminal output node (33).The all-pass-network...

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1. Verfasser: NIGEL PAUL DYER
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Sprache:eng
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BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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creator NIGEL PAUL DYER
description A low frequency digital notch filter (fig.l) comprising two sub-filters - an all-pass-network filter (l) and a T-section filter (3) with a feedback connection from the T-filter to an input node (3l), and feed forward connection from this input node to a terminal output node (33).The all-pass-network filter (l) has a transform function:-A(Z) - [Z⁻¹ + K] / [l + K₁Z⁻¹]; and the T-section filter (3) has throughput and tap transform functions:-B(Z) - [l +(K₂.K₄-K₃)Z⁻¹ ] / [l - K₃Z⁻¹], and,C(Z) - K₂Z⁻¹ /[l - K₃Z⁻¹],where Z⁻¹ is the unit delay operator and K₁ to K₄ are multiplier coefficients.The T-section filter 3 may be implimented using a combination of three multipliers l9, 2l and 23 and a delay element 25.
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and the T-section filter (3) has throughput and tap transform functions:-B(Z) - [l +(K₂.K₄-K₃)Z⁻¹ ] / [l - K₃Z⁻¹], and,C(Z) - K₂Z⁻¹ /[l - K₃Z⁻¹],where Z⁻¹ is the unit delay operator and K₁ to K₄ are multiplier coefficients.The T-section filter 3 may be implimented using a combination of three multipliers l9, 2l and 23 and a delay element 25.</description><edition>5</edition><language>eng</language><subject>BASIC ELECTRONIC CIRCUITRY ; ELECTRICITY ; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS ; RESONATORS</subject><creationdate>1990</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19901208&amp;DB=EPODOC&amp;CC=IN&amp;NR=167705B$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19901208&amp;DB=EPODOC&amp;CC=IN&amp;NR=167705B$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>NIGEL PAUL DYER</creatorcontrib><title>LOW FREQUENCY DIGITAL NOTCH FILTER</title><description>A low frequency digital notch filter (fig.l) comprising two sub-filters - an all-pass-network filter (l) and a T-section filter (3) with a feedback connection from the T-filter to an input node (3l), and feed forward connection from this input node to a terminal output node (33).The all-pass-network filter (l) has a transform function:-A(Z) - [Z⁻¹ + K] / [l + K₁Z⁻¹]; 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and the T-section filter (3) has throughput and tap transform functions:-B(Z) - [l +(K₂.K₄-K₃)Z⁻¹ ] / [l - K₃Z⁻¹], and,C(Z) - K₂Z⁻¹ /[l - K₃Z⁻¹],where Z⁻¹ is the unit delay operator and K₁ to K₄ are multiplier coefficients.The T-section filter 3 may be implimented using a combination of three multipliers l9, 2l and 23 and a delay element 25.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record>
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subjects BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
title LOW FREQUENCY DIGITAL NOTCH FILTER
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