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Modified Current Differencing Unit and its Application for Electronically Reconfigurable Simple First-order Transfer FunctionSOTNER, R. , JERABEK, J. , HERENCSAR, N. , ZAK, T. , JAIKLA, W. , VRBA, K.
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Current differencing unit, controllable current gain, controllable intrinsic current input resistance, reconfigurability, multifunctional filter.
current(32), signal(15), mode(14), sotner(13), processing(11), filters(11), filter(11), circuits(11), jerabek(10), dostal(10)
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About this article
Date of Publication: 2015-02-28
Volume 15, Issue 1, Year 2015, On page(s): 3 - 10
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2015.01001
Web of Science Accession Number: 000352158600001
SCOPUS ID: 84924811819
Modified current differencing unit (MCDU) and its simple filtering application are introduced in this paper. Modification of the well-known current differencing unit consists in weighted difference of both input currents controlled by adjustable current gain, controllable intrinsic resistance of both current input terminals, and availability of additional voltage terminal(s). Definition of MCDU therefore requires four adjustable parameters (B1, B2, Rp, Rn). A presented active element offers and combines benefits of electronically controllable current conveyor of second generation and current differencing unit and allows synthesis of interesting adjustable applications, which are not available by classical approaches based on simple elements. MCDU brings variability of the transfer function into the structure. It provides several transfer types without necessity of input or output node change by simple electronic tuning. A presented structure represents so-called reconnection-less reconfigurable current-mode filter for realization of all-pass, inverting high-pass, low-pass and direct transfer response. Behavioral model of the MCDU was prepared and carefully tested in filtering application. Spice simulations and measurements confirmed theoretical assumptions.
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 Design of the simple oscillator with linear tuning and pi/4 phase shift based on emulator of the modified current differencing unit, Sotner, Roman, Jerabek, Jan, Herencsar, Norbert, Vrba, Kamil, IEICE Electronics Express, ISSN 1349-2543, Issue 19, Volume 12, 2015.
Digital Object Identifier: 10.1587/elex.12.20150557 [CrossRef]
 A Single-Ended and Fully-Differential Universal Current-Mode Frequency Filter with MO-CF and DACA Elements, LANGHAMMER, L., JERABEK, J., POLAK, J., PANEK, D., Advances in Electrical and Computer Engineering, ISSN 1582-7445, Issue 3, Volume 16, 2016.
Digital Object Identifier: 10.4316/AECE.2016.03007 [CrossRef] [Full text]
 A CMOS Multiplied Input Differential Difference Amplifier: A New Active Device and Its Applications, Sotner, Roman, Jerabek, Jan, Prokop, Roman, Kledrowetz, Vilem, Polak, Josef, Applied Sciences, ISSN 2076-3417, Issue 1, Volume 7, 2017.
Digital Object Identifier: 10.3390/app7010106 [CrossRef]
 A Novel Target Tracking Algorithm for Simultaneous Measurements of Radar and Infrared Sensors, GHAZAL, M., DOUSTMOHAMMADI, A., Advances in Electrical and Computer Engineering, ISSN 1582-7445, Issue 3, Volume 16, 2016.
Digital Object Identifier: 10.4316/AECE.2016.03009 [CrossRef] [Full text]
 Resistorless Current-Mode First-Order All-Pass Filter with Electronic Tuning Employing Low-Voltage CBTA and Grounded Capacitor, Herencsar, Norbert, Koton, Jaroslav, Lahiri, Abhirup, Ayten, Umut E., Sagbas, Mehmet, Journal of Circuits, Systems and Computers, ISSN 0218-1266, Issue 02, Volume 27, 2018.
Digital Object Identifier: 10.1142/S0218126618500317 [CrossRef]
 Special electronically reconfigurable lossy/lossless integrator in application of functional generator, Sotner, Roman, Petrzela, Jiri, Jerabek, Jan, Domansky, Ondrej, Langhammer, Lukas, Dostal, Tomas, 2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA), ISBN 978-1-5090-4591-4, 2017.
Digital Object Identifier: 10.1109/RADIOELEK.2017.7937595 [CrossRef]
 Reconfigurable 1<sup>st</sup> order filters based on differential voltage input and a single current output transconductance multiplier, Sotner, Roman, Jerabek, Jan, Prokop, Roman, Kledrowetz, Vilem, Fujcik, Lukas, Dostal, Tomas, IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON), ISBN 978-1-4799-8569-2, 2015.
Digital Object Identifier: 10.1109/EUROCON.2015.7313769 [CrossRef]
 MISO universal frequency filter with dual-parameter control of the pole frequency, Jerabek, Jan, Sotner, Roman, Herencsar, Norbert, Polak, Josef, Dvorak, Jan, Koton, Jaroslav, 2015 9th International Conference on Electrical and Electronics Engineering (ELECO), ISBN 978-6-0501-0737-1, 2015.
Digital Object Identifier: 10.1109/ELECO.2015.7394535 [CrossRef]
 First-order reconfigurable reconnection-less filters using modified current differencing unit, Sotner, R., Jerabek, J., Herencsar, N., Prokop, R., Vrba, K., Dostal, T., 2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA), ISBN 978-1-4799-8117-5, 2015.
Digital Object Identifier: 10.1109/RADIOELEK.2015.7128992 [CrossRef]
 New tunable resistorless CM first-order filter based on single CBTA and grounded capacitor, Herencsar, Norbert, Koton, Jaroslav, Sagbas, Mehmet, Ayten, Umut E., 2016 IEEE 59th International Midwest Symposium on Circuits and Systems (MWSCAS), ISBN 978-1-5090-0916-9, 2016.
Digital Object Identifier: 10.1109/MWSCAS.2016.7870064 [CrossRef]
 Design of integer/fractional-order filter with electronically reconfigurable transfer response, Sotner, Roman, Herencsar, Norbert, Jerabek, Jan, Petrzela, Jiri, Dostal, Tomas, 2017 24th IEEE International Conference on Electronics, Circuits and Systems (ICECS), ISBN 978-1-5386-1911-7, 2017.
Digital Object Identifier: 10.1109/ICECS.2017.8292080 [CrossRef]
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