| 一种应用于频率综合器的全差分电荷泵的设计与噪声分析 |
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| 引用本文： | 宫志超,卢磊,廖友春,唐长文.一种应用于频率综合器的全差分电荷泵的设计与噪声分析[J].半导体学报,2009,30(10):105013-6. |
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| 作者姓名： | 宫志超 卢磊 廖友春 唐长文 |
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| 基金项目： | 国家高技术研究发展计划 |
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| 摘 要： | A fully-differential charge pump（FDCP）with perfect current matching and low output current noise is realized for phase-locked loops（PLLs）.An easily stable common-mode feedback（CMFB）circuit which can handle high input voltage swing is proposed.Current mismatch and current noise contribution from the CMFB circuit is minimized.In order to optimize PLL phase noise,the output current noise of the FDCP is analyzed in detail and calculated with the sampling principle.The calculation result agrees well with the simulation.Based on the noise analysis,many methods to lower output current noise of the FDCP are discussed.The fully-differential charge pump is integrated into a 1–2 GHz frequency synthesizer and fabricated in an SMIC CMOS 0.18μm process.The measured output reference spur is–64 dBc to–69 dBc.The in-band and out-band phase noise is–95 dBc/Hz at 3 kHz frequency offset and–123 dBc/Hz at 1 MHz frequency offset respectively.
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| 关 键 词： | 电荷泵锁相环 低噪声 阶段分析 频率合成器 输出电流 设计 共模反馈 电流噪声 |
| 收稿时间： | 4/4/2009 5:17:23 PM |
| 修稿时间： | 5/18/2009 2:50:43 PM |
Design and noise analysis of a fully-differential charge pump for phase-locked loops |
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| Gong Zhichao,Lu Lei,Liao Youchun and Tang Zhangwen.Design and noise analysis of a fully-differential charge pump for phase-locked loops[J].Chinese Journal of Semiconductors,2009,30(10):105013-6. |
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| Authors: | Gong Zhichao Lu Lei Liao Youchun and Tang Zhangwen |
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| Affiliation: | ASIC & System State Key Laboratory, Fudan University, Shanghai 201203, China;ASIC & System State Key Laboratory, Fudan University, Shanghai 201203, China;Ratio Microelectronics Technology Co, Ltd, Shanghai 200433, China;ASIC & System State Key Laboratory, Fudan University, Shanghai 201203, China |
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| Abstract: | fully-differential charge pump mismatch noise common-mode feedback phase-locked loop |
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| Keywords: | fully-differential charge pump mismatch noise common-mode feedback phase-locked loop |
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