Table of Contents
ISRN Electronics
Volume 2014, Article ID 126471, 5 pages
Research Article

OTRA Based Voltage Mode Third Order Quadrature Oscillator

1Department of Electronics and Communication Engineering, Delhi Technological University, Delhi 110042, India
2Department of Electronics and Communication Engineering, JSS Academy of Technical Education, C-20/1 Sector 62, NOI DA, Uttar Pradesh 201301, India

Received 2 February 2014; Accepted 9 March 2014; Published 29 April 2014

Academic Editors: S. Gift, R. Senani, and E. Tlelo-Cuautle

Copyright © 2014 Rajeshwari Pandey et al. 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.


Two topologies of operational transresistance (OTRA) based third order quadrature oscillators (QO) are proposed in this paper. The proposed oscillators are designed using a combination of lossy and lossless integrators. The proposed topologies can be made fully integrated by implementing the resistors using matched transistors operating in linear region, which also facilitates electronic tuning of oscillation frequency. The nonideality analysis of the circuit is also given and for high frequency applications self-compensation can be used. Workability of the proposed QOs is verified through PSPICE simulations using 0.5 μm AGILENT CMOS process parameters. The total harmonic distortion (THD) for both the QO designs is found to be less than 1%.