{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,26]],"date-time":"2025-05-26T06:46:08Z","timestamp":1748241968240},"reference-count":18,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2006,12,13]],"date-time":"2006-12-13T00:00:00Z","timestamp":1165968000000},"content-version":"vor","delay-in-days":6131,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"National Science Foundation","award":["MIP 85-08017"],"award-info":[{"award-number":["MIP 85-08017"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Circuit Theory &amp; Apps"],"published-print":{"date-parts":[[1990,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>A new method for changing the cut\u2010off frequency of infinite impulse response (IIR) digital filters with a single parameter is derived. the method is based on the use of the Taylor series expansion of the lowpass\u2010to\u2010lowpass frequency transformation. the filter structure is a parallel connection of real or complex allpass sections. the tuning range is several octaves for narrowband filters. By taking also the complementary output, a power\u2010complementary filter pair with tunable crossover frequency is readily obtained. Tunable centre frequency and bandwidth are obtained by incorporating a special lowpass\u2010to\u2010bandpass transformation into the structure. Design examples and a description of a signal processor implementation are included.<\/jats:p>","DOI":"10.1002\/cta.4490180202","type":"journal-article","created":{"date-parts":[[2007,7,1]],"date-time":"2007-07-01T22:16:54Z","timestamp":1183328214000},"page":"107-119","source":"Crossref","is-referenced-by-count":38,"title":["Design of recursive digital filters with variable characteristics"],"prefix":"10.1002","volume":"18","author":[{"given":"Sanjit K.","family":"Mitra","sequence":"first","affiliation":[]},{"given":"Yrj\u00f6","family":"Neuvo","sequence":"additional","affiliation":[]},{"given":"Hannu","family":"Roivainen","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2006,12,13]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1049\/piee.1970.0281"},{"key":"e_1_2_1_3_2","first-page":"524","article-title":"Variable digital filters","volume":"24","author":"Schuessler W.","year":"1970","journal-title":"AEU"},{"key":"e_1_2_1_3_3","volume-title":"Digital Signal Processing","author":"Rabiner L. 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September1984 pp.165\u2013169."},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.1049\/el:19820221"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.1002\/cta.4490020210"},{"key":"e_1_2_1_12_2","doi-asserted-by":"publisher","DOI":"10.1109\/TASSP.1986.1164829"},{"key":"e_1_2_1_13_2","doi-asserted-by":"publisher","DOI":"10.1109\/TCS.1974.1083908"},{"key":"e_1_2_1_14_2","doi-asserted-by":"publisher","DOI":"10.1109\/31.1816"},{"key":"e_1_2_1_15_2","unstructured":"Y.NeuvoandS. K.Mitra \u2018Complementary IIR digital filters\u2019 Proc. IEEE Int. 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