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Current mode quadrature oscillator using current differencing transconductance amplifiers (CDTA)
Current mode quadrature oscillator using current differencing transconductance amplifiers (CDTA)
- Author(s): A.Ü. Keskin and D. Biolek
- DOI: 10.1049/ip-cds:20050304
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- Author(s): A.Ü. Keskin 1 and D. Biolek 2
-
-
View affiliations
-
Affiliations:
1: Department of Biomedical Engineering, Yeditepe University, Istanbul, Turkey
2: Department of Microelectronics, Brno University of Technology, Brno, Czech Republic
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Affiliations:
1: Department of Biomedical Engineering, Yeditepe University, Istanbul, Turkey
- Source:
Volume 153, Issue 3,
June 2006,
p.
214 – 218
DOI: 10.1049/ip-cds:20050304 , Print ISSN 1350-2409, Online ISSN 1359-7000
© The Institution of Engineering and Technology
Published
A CDTA-based quadrature oscillator circuit is proposed. The circuit employs two current-mode allpass sections in a loop, and provides high-frequency sinusoidal oscillations in quadrature at high impedance output terminals of the CDTAs. The circuit has no floating capacitors, which is advantageous from the integrated circuit manufacturing point of view. Moreover, the oscillation frequency of this configuration can be made adjustable by using voltage controlled elements (MOSFETs), since the resistors in the circuit are either grounded or virtually grounded.
Inspec keywords: operational amplifiers; differentiating circuits; current-mode circuits; oscillators
Other keywords:
Subjects: Oscillators; Amplifiers
References
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