| Citation: |
Zheng Yongzheng, Xia Lingli, Li Weinan, Huang Yumei, Hong Zhiliang. A fast-hopping 3-band CMOS frequency synthesizer for MB-OFDM UWB system[J]. Journal of Semiconductors, 2009, 30(9): 095006. doi: 10.1088/1674-4926/30/9/095006
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Zheng Y Z, Xia L L, Li W N, Huang Y M, Hong Z L. A fast-hopping 3-band CMOS frequency synthesizer for MB-OFDM UWB system[J]. J. Semicond., 2009, 30(9): 095006. doi: 10.1088/1674-4926/30/9/095006.
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A fast-hopping 3-band CMOS frequency synthesizer for MB-OFDM UWB system
DOI: 10.1088/1674-4926/30/9/095006
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Abstract
A fast-hopping 3-band (mode 1) multi-band orthogonal frequency division multiplexing ultra-wideband frequency synthesizer is presented. This synthesizer uses two phase-locked loops for generating steady frequencies and one quadrature single-sideband mixer for frequency shifting and quadrature frequency generation. The generated carriers can hop among 3432 MHz, 3960 MHz, and 4488 MHz. Implemented in a 0.13 μm CMOS process, this fully integrated synthesizer consumes 27 mA current from a 1.2 V supply. Measurement shows that the out-of-band spurious tones are below –50 dBc, while the in-band spurious tones are below –34 dBc. The measured hopping time is below 2 ns. The core die area is 1.0 × 1.8 mm2.-
Keywords:
- frequency synthesizer
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