| Citation: |
Zhou Chunyuan, Li Guolin, Zhang Chun, Chi Baoyong, Li Dongmei, Wang Zhihua. A fractional-N frequency synthesizer forWCDMA/Bluetooth/ZigBee applications[J]. Journal of Semiconductors, 2009, 30(7): 075008. doi: 10.1088/1674-4926/30/7/075008
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Zhou C Y, Li G L, Zhang C, Chi B Y, Li D M, Wang Z H. A fractional-N frequency synthesizer forWCDMA/Bluetooth/ZigBee applications[J]. J. Semicond., 2009, 30(7): 075008. doi: 10.1088/1674-4926/30/7/075008.
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A fractional-N frequency synthesizer forWCDMA/Bluetooth/ZigBee applications
DOI: 10.1088/1674-4926/30/7/075008
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Abstract
A triple-mode fractional-N frequency synthesizer with a noise-filter voltage control oscillator (VCO) for WCDMA/Bluetooth/ZigBee applications has been implemented in 0.18 μm RF-CMOS technology. The proposed synthesizer achieves a good phase noise lower than -80 dBc/Hz in band and -115 dBc/Hz @ 1 MHz for the three modes, which only draws 21 mA from 1.8 V supply. It has a high hardware sharing and a small size which is only 1.5 mm × 1.4 mm. The system architecture, circuit design and measured results are presented in this paper.-
Keywords:
- multi-standard,
- PLL,
- frequency synthesizers,
- VCO
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References
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