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Ivan Uzunov
Atanas Tanev
Marin Hristov

Author(s) and WSEAS

Ivan Uzunov
Atanas Tanev
Marin Hristov

WSEAS Transactions on Circuits and Systems

Print ISSN: 1109-2734
E-ISSN: 2224-266X

Volume 16, 2017

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of WSEAS Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

Volume 16, 2017

Design and Investigation of Tunable Gyrator Resonance Circuit Implemented on AMS 0.35µm Process

AUTHORS: Ivan Uzunov, Atanas Tanev, Marin Hristov

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ABSTRACT: The paper considers some basic problems in the design of tunable fully differential gyrator resonance circuit. First is presented briefly the theory of the parallel gyrator tank with emphasizing on the effects from the amplifier imperfections. Then is considered the design of a single stage operational transconductance amplifier (OTA) with source degeneration for better linearity. It is demonstrated by simulation that wide range of variation of OTA’s gm with preserving the linearity can be achieved by using of an architecture, consisting of several parallel connected differential cells with different gms. They are switched on and off and the designed amplifier has 3 cells with gm of 50, 100 and 200µS. The resonance frequency of the gyrator tank, created with two such amplifiers, can be increased 7 times. The Q-factor of the tank is also tunable by negative resistances in parallel to the OTA outputs.

KEYWORDS: active filters, gyrator, programmable filters, operational transconductance amplifiers, CMOS, nonlinear distortion


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WSEAS Transactions on Circuits and Systems, ISSN / E-ISSN: 1109-2734 / 2224-266X, Volume 16, 2017, Art. #6, pp. 45-54

Copyright © 2017 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution License 4.0

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