Copyright © 2008 The Institute of Electronics, Information and Communication Engineers
Special Section on Analog Circuits and Related SoC Integration Technologies - Letter |
Balanced Three-Phase Active-RC Tow-Thomas Biquad Complex Filter for Wireless Communication Systems
1 The authors are with Tokyo University of Science, Noda-shi, 278-8510 Japan. E-mail: matsuno{at}vlsi.ee.noda.tus.ac.jp
A three-phase complex filter for a balanced three-phase analog signal processing is proposed. The proposed three-phase active-RC Tow-Thomas biquad complex filter can reduce total resistance by 10 percent, total capacitance by 25 percent, and power consumption by 22 percent compared to a conventional fully differential quadrature complex one.
Key Words: three-phase, active-RC, Tow-Thomas, complex filter
Manuscript received October 23, 2007. Manuscript revised December 21, 2007.
References
[1] J. Crols and M.S.J. Steaert, "Low-IF topologies for high-performance analog front ends of fully integrated receivers," IEEE Trans. Circuits Syst. II, Analog Digit. Signal Process., vol.45, no.3, pp.269–282, March 1998. [2] T. Yamaji, T. Itakura, R. Ito, T. Ueno, and H. Okumi, "Balanced 3-phase analog signal processing for radio communications," IEEE ISCAS, 2006. [3] A. Yamazaki, A. Ravindran, O.C. Akgun, and M. Ismail, "An active-RC reconfigurable lowpass-polyphase Tow-Thomas biquad filter," IEEE International Midwest Symposium on Circuits and Systems, 2004.
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