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A 0.6–2.7 GHz Semidynamic Frequency Divide-by-3 Utilizing Wideband RC Polyphase Filter in 0.18 \mu m CMOS

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2 Author(s)
Seungsoo Kim ; Dept. of Radio Sci. & Eng., Kwangwoon Univ., Seoul ; Hyunchol Shin

A wideband complementary metal oxide semiconductor (CMOS) semidynamic frequency divide-by-3 covering more than two octave bandwidths is presented. The wideband operation without requiring a quadrature signal source is realized by employing a three-stage RC polyphase filter. The transfer function analysis on Type-II two- and three-stage polyphase filters is performed to provide analytic solutions of the peak phase error and peak attenuation. Implemented in 0.18 mum CMOS, the divide-by-3 operates over the input frequency range between 0.6 and 2.7 GHz while dissipating 15 mA from a 1.8 V supply.

Published in:

IEEE Microwave and Wireless Components Letters  (Volume:18 ,  Issue: 10 )