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Design of Novel Precise Quadrature Oscillators Employing ECCIIs with Electronic ControlSOTNER, R. , LAHIRI, A. , KARTCI, A. , HERENCSAR, N. , JERABEK, J. , VRBA, K.
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direct electronic control, current gain adjusting, electronically controllable current conveyors, quadrature oscillators, signal flow graph approach
current(27), signal(13), mode(13), circuits(13), processing(11), oscillator(10), analog(10), tunable(9), filter(9), electronically(9)
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About this article
Date of Publication: 2013-05-31
Volume 13, Issue 2, Year 2013, On page(s): 65 - 72
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2013.02011
Web of Science Accession Number: 000322179400011
SCOPUS ID: 84878938889
In this paper, an interesting design of precise quadrature oscillator employing electronically controllable current conveyors of the second generation (ECCII) is presented. The main purpose of this paper is to show advantages and features of direct electronic control of application by an adjustable current gain where help of signal flow graph approach was used to clearer and visual understanding of the design. The discussed circuit and its presented modification have several favorable features such as grounded capacitors, independent electronic adjusting of oscillation frequency and condition of oscillation by the current gain and easy automatic gain control circuit (AGC) implementation (non-ideal effects of tuning process on output amplitudes are suppressed). Oscillator was designed for frequency band of units of MHz and tested with two types of inertial AGCs. Theoretical presumptions were confirmed by laboratory experiments.
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 Quadrature voltage control oscillator with a linear tuning law, Nandi, Rabindranath, Mathur, Koushick, Venkateswaran, Palaniandavar, IET Circuits, Devices & Systems, ISSN 1751-858X, Issue 2, Volume 12, 2018.
Digital Object Identifier: 10.1049/iet-cds.2017.0251 [CrossRef]
 Comparison of Two Solutions of Quadrature Oscillators With Linear Control of Frequency of Oscillation Employing Modern Commercially Available Devices, Sotner, Roman, Jerabek, Jan, Langhammer, Lukas, Polak, Josef, Herencsar, Norbert, Prokop, Roman, Petrzela, Jiri, Jaikla, Winai, Circuits, Systems, and Signal Processing, ISSN 0278-081X, Issue 11, Volume 34, 2015.
Digital Object Identifier: 10.1007/s00034-015-0015-7 [CrossRef]
 Electronically tunable current-mode biquadratic filter and four-phase quadrature oscillator, Li, Yong An, Microelectronics Journal, ISSN 0026-2692, Issue 3, Volume 45, 2014.
Digital Object Identifier: 10.1016/j.mejo.2013.12.005 [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]
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Faculty of Electrical Engineering and Computer Science
Stefan cel Mare University of Suceava, Romania
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