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The Scientific World Journal
Volume 2014 (2014), Article ID 572165, 8 pages
Research Article

Electronically Tunable Quadrature Oscillator Using Grounded Components with Current and Voltage Outputs

Department of Electronic Engineering, Ming Chi University of Technology, New Taipei, Taiwan

Received 22 April 2014; Revised 26 June 2014; Accepted 26 June 2014; Published 10 July 2014

Academic Editor: Soliman A. Mahmoud

Copyright © 2014 Hua-Pin Chen. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The electronically tunable quadrature oscillator using a single multiple-output current controlled current differencing transconductance amplifier (MO-CCCDTA) and grounded passive components is presented. The proposed configuration uses a single MO-CCCDTA, two grounded capacitors and one grounded resistor. Two high-output impedance quadrature current signals and two quadrature voltage signals with 90° phase difference. The oscillation condition and oscillation frequency of the proposed quadrature oscillator are independently controllable. The use of only grounded passive components makes the proposed circuit ideal for integrated circuit implementation.