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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">radioelectronics</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений России. Радиоэлектроника</journal-title><trans-title-group xml:lang="en"><trans-title>Journal of the Russian Universities. Radioelectronics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1993-8985</issn><issn pub-type="epub">2658-4794</issn><publisher><publisher-name>Saint Petersburg Electrotechnical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32603/1993-8985-2018-21-2-20-25</article-id><article-id custom-type="elpub" pub-id-type="custom">radioelectronics-216</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ПРОЕКТИРОВАНИЕ И ТЕХНОЛОГИЯ РАДИОЭЛЕКТРОННЫХ СРЕДСТВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ENGINEERING DESIGN AND TECHNOLOGIES OF RADIO ELECTRONIC FACILITIES</subject></subj-group></article-categories><title-group><article-title>Полосовой активный RC-фильтр c линейно перестраиваемой добротностью</article-title><trans-title-group xml:lang="en"><trans-title>Tunable Active Band-Pass RC-Filter</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Иншаков</surname><given-names>Ю. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Inshakov</surname><given-names>Yu. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иншаков Юрий Михайлович – кандидат технических наук, доцент, профессор кафедры теоретических основ электротехники </p><p>ул. Профессора Попова, д. 5, Санкт-Петербург, 197376</p></bio><bio xml:lang="en"><p>Yuri M. Inshakov – Ph.D. in Engineering (1973), Associate Professor (1978), Professor of the Department of Theoretical Bases </p><p>5, Professor Popov Str., 197376, St. Petersburg, Russia</p></bio><email xlink:type="simple">Inshakov40@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белов</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Belov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Белов Александр Викторович – кандидат технических наук, ведущий научный сотрудник </p><p>ул. Академика Павлова, д. 12, Санкт-Петербург, 197376</p></bio><bio xml:lang="en"><p>Alexander V. Belov – Ph.D. in Engineering (1977), Leading Scientist </p><p>12, Academic Pavlov Str., 197376, St. Petersburg, Russia</p></bio><email xlink:type="simple">avbelov1@ya.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургский государственный электротехнический университет "ЛЭТИ" им. В. И. Ульянова (Ленина)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Saint Petersburg Electrotechnical University "LETI"</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБНУ "Институт экспериментальной медицины"</institution><country>Россия</country></aff><aff xml:lang="en"><institution>FSBSI "Institute of Experimental Medicine"</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>28</day><month>04</month><year>2018</year></pub-date><volume>0</volume><issue>2</issue><fpage>20</fpage><lpage>25</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Иншаков Ю.М., Белов А.В., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Иншаков Ю.М., Белов А.В.</copyright-holder><copyright-holder xml:lang="en">Inshakov Y.M., Belov A.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://re.eltech.ru/jour/article/view/216">https://re.eltech.ru/jour/article/view/216</self-uri><abstract><p>Приведена методика разработки и моделирования активного полосно-пропускающего RC-фильтра второго порядка с линейно перестраиваемой добротностью и независимой перестройкой в широких пределах резонансной частоты и коэффициента передачи. Перестраиваемый активный полосно-пропускающий RC-фильтр требуется для селективной обработки электрических сигналов в радиотехнических системах и устройствах, а также в информационно-измерительных комплексах, акустической и гидроакустической аппаратуре, включая приборы для анализа шумов и вибраций, а также в эквалайзерах для выделения полезных сигналов.</p><p>Фильтр построен на основе активного корректирующего звена второго порядка с использованием перестраиваемой RC-схемы T-моста. Получены расчетные формулы для параметров фильтра: резонансной частоты, полюсной добротности и коэффициента передачи. Показано, что в схеме фильтра эти параметры могут в широких пределах независимо перестраиваться. Резонансная частота фильтра перестраивается с помощью сдвоенных переменных резисторов при сохранении постоянства добротности и коэффициента передачи. Полюсная добротность регулируется изменением сопротивления переменного резистора при сохранении коэффициента передачи и резонансной частоты. Коэффициент передачи изменяется с помощью другого переменного резистора.</p><p>Приведены выводы выражений для перестраиваемых параметров предложенной схемы полоснопропускающего активного RС-фильтра, подтверждающие произведенные исследования, а также представлены частотные характеристики фильтра и графики перестраиваемых параметров. Реализация фильтра подтверждена моделированием с использованием программных средств MicroCap10.</p></abstract><trans-abstract xml:lang="en"><p>This article provides a technique for design and simulation of an active second order band-pass filter with lineal tuning of Q-factor and independent tuning over a wide range of resonant frequency and transfer coefficient. The tunable band-pass RC-filter is required for selective processing of electric signals in radio engineering systems and devices, as well as in in-formation measuring systems, the acoustic and hydro acoustic equipment, including devices for noise and vibration analysis. The band-pass RC-filter is required in equalizers for allocation of useful signals.</p><p>It is shown that the filter is constructed on the basis of the active second order correcting link with the use of tunable RCcircuit T-bridge. Calculation formulas for filter parameters are received, i.e. resonant frequency, polar Q-factor and transfer coefficient. It is shown that in the filter circuit these parameters can independently be tunable over a wide range. Resonant frequency of the filter is tuned by means of dual variable resistors with the Q-factor and transfer coefficient remaining constant.</p><p>Polar Q-factor is regulated by change of resistance of the variable resistor with transfer coefficient and resonant frequency remaining constant. The transfer coefficient changes by means of another variable resistor.</p><p>The conclusions of expressions for the tuned parameters of the suggested circuit of the active band-pass RC-filter confirming the research are provided, as well as the filter frequency characteristics and tunable parameter diagrams. Filter implementation is supported by simulation with the use of MicroCap10 software.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>полосовой активный RC-фильтр</kwd><kwd>резонансная частота</kwd><kwd>полюсная добротность</kwd><kwd>коэффициент передачи фильтра</kwd></kwd-group><kwd-group xml:lang="en"><kwd>active band-pass RC-filter</kwd><kwd>variation of resonant frequency</kwd><kwd>polar quality factor</kwd><kwd>transfer coefficient of filter</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Kureve T. D., Mise J. A., Atsuwe B. A. 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