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IEICE Transactions on Electronics 2008 E91-C(6):945-948; doi:10.1093/ietele/e91-c.6.945
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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

Junya MATSUNO1, Hiroki SATO1, Akira HYOGO1 and Keitaro SEKINE1

1 The authors are with Tokyo University of Science, Noda-shi, 278-8510 Japan. E-mail: matsuno{at}vlsi.ee.noda.tus.ac.jp


  Abstract

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.


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