| Citation: |
Chen Pufeng, Li Zhiqiang, Wang Xiaosong, Zhang Haiying, Ye Tianchun. A 6-9 GHz 5-band CMOS synthesizer for MB-OFDM UWB[J]. Journal of Semiconductors, 2010, 31(7): 075001. doi: 10.1088/1674-4926/31/7/075001
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Chen P F, Li Z Q, Wang X S, Zhang H Y, Ye T C. A 6-9 GHz 5-band CMOS synthesizer for MB-OFDM UWB[J]. J. Semicond., 2010, 31(7): 075001. doi: 10.1088/1674-4926/31/7/075001.
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Abstract
An ultra-wideband frequency synthesizer is designed to generate carrier frequencies for 5 bands distributed from 6 to 9 GHz with less than 3 ns switching time. It incorporates two phase-locked loops and one single-sideband (SSB) mixer. A 2-to-1 multiplexer with high linearity is proposed. A modified wideband SSB mixer, quadrature VCO, and layout techniques are also employed. The synthesizer is fabricated in a 0.18 μm CMOS process and operates at 1.5-1.8 V while consuming 40 mA current. The measured phase noise is -128 dBc/Hz at 10 MHz offset, and the sideband rejection is -22 dBc at 7.656 GHz. -
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