Fully integrated CMOS fractional-N frequency divider for wide-band mobile applications with spurs reduction |
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| Authors: | Boon C.C. Do M.A. Yeo K.S. Ma J.G. |
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| Affiliation: | Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore; |
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| Abstract: | A spurs reduction fractional-N frequency divider with a frequency range which is 3.5 times larger than that of a conventional fractional-N divider is presented in this paper. A 1.2-GHz quadrature voltage-controlled oscillator (VCO) is designed as the input source of the frequency divider. The circuit was fabricated using the 0.25-/spl mu/m CMOS technology. The power consumption of the frequency divider and the quadrature VCO are 3 and 6 mW, respectively, at a 2-V supply. |
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