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Multifunctional current-mode filter with dual-parameter control of the pole frequencyJERABEK, J. , DVORAK, J. , SOTNER, R. , METIN, B. , VRBA, K.
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active filters, circuit analysis, circuit synthesis, current-mode circuits, tunable circuits and devices
current(52), filter(29), mode(27), universal(20), electronics(13), circuits(12), systems(11), single(10), controlled(10), biquad(10)
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About this article
Date of Publication: 2016-08-31
Volume 16, Issue 3, Year 2016, On page(s): 31 - 36
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2016.03005
Web of Science Accession Number: 000384750000005
SCOPUS ID: 84991113072
This paper presents a multifunctional current-mode filter with dual-parameter control of the pole frequency. The filter is of the second order, of single-input triple-output (SITO) type and a required type of the response (low pass, inverting band pass, high pass, band reject and all pass) is obtained by proper selection of one or more outputs. The filter employs two capacitors, two operational transconductance amplifiers (OTAs), each of them with controllable transconductance, and two digitally adjustable current amplifiers (DACAs), providing controllable current gain. Both these controllable parameters directly influence pole frequency of the filter. The theoretical presumptions were confirmed by laboratory measurements.
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 A Programmable Biopotential Aquisition Front-end with a Resistance-free Current-balancing Instrumentation Amplifier, FARAGO, P., GROZA, R., HINTEA, S., SOSER, P., Advances in Electrical and Computer Engineering, ISSN 1582-7445, Issue 2, Volume 18, 2018.
Digital Object Identifier: 10.4316/AECE.2018.02011 [CrossRef] [Full text]
 Experimental Verification of Pseudo-Differential Electronically Controllable Multifunction Filter Using Modified Current Differencing/Summing Units, Jerabek, Jan, Dvorak, Jan, Sotner, Roman, Herencsar, Norbert, Koton, Jaroslav, Journal of Circuits, Systems and Computers, ISSN 0218-1266, 2018.
Digital Object Identifier: 10.1142/S0218126619500981 [CrossRef]
 Single active parameter tunable simple band-pass filter: Methods for tunability range extension, Sotner, Roman, Petrzela, Jiri, Domansky, Ondrej, Langhammer, Lukas, Dostal, Tomas, 2017 MIXDES - 24th International Conference "Mixed Design of Integrated Circuits and Systems, ISBN 978-83-63578-12-1, 2017.
Digital Object Identifier: 10.23919/MIXDES.2017.8005223 [CrossRef]
 Exponentially tunable voltage controlled quadrature oscillator, Sotner, Roman, Jerabek, Jan, Petrzela, Jiri, Domansky, Ondrej, Jaikla, Winai, Dostal, Tomas, 2017 40th International Conference on Telecommunications and Signal Processing (TSP), ISBN 978-1-5090-3982-1, 2017.
Digital Object Identifier: 10.1109/TSP.2017.8075992 [CrossRef]
 Fully-Differential Universal Frequency Filter with Dual-Parameter Control of the Pole Frequency and Quality Factor, Langhammer, Lukas, Sotner, Roman, Dvorak, Jan, Jerabek, Jan, Zapletal, Miroslav, 2018 IEEE International Symposium on Circuits and Systems (ISCAS), ISBN 978-1-5386-4881-0, 2018.
Digital Object Identifier: 10.1109/ISCAS.2018.8351005 [CrossRef]
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Stefan cel Mare University of Suceava, Romania
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