Wide-band CMOS VCO and frequency divider design for quadrature signal generation
Wide-band CMOS VCO and frequency divider design for quadrature signal generation
复制标题
用于生成正交信号的宽带 CMOS VCO 和分频器设计
DOI：
10.1109/mwsym.2004.1338857
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
J. Laskar
中科院分区：
文献类型：
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作者：
Y. Park;S. Chakraborty;Chang;S. Nuttinck;J. Laskar
我们提出了一个完全集成的宽带（3.3GHz-4GHz）CMOS压控振荡器和分频器的设计，实现和测量，以及分析和比较VCO的拓扑结构，其均匀的相位噪声性能在宽调谐范围。此外，根据实验结果首次分析了分频器的动态范围。不同的VCO的拓扑结构进行了研究，通过使用测量结果。结果表明，无电流源的NMOS-PMOS压控振荡器（NP-core VCO）在650 MHz的整个调谐范围内具有低至2dB的相位噪声变化，在1 MHz偏移处的相位噪声性能达到-118.5dBc/Hz，而NMOS压控振荡器（N-core VCO）在高变容管增益区由于AM-FM转换而出现17 dB的严重相位噪声退化。设计了一个分频器来产生用于直接转换的正交信号。测量结果显示了分频器的动态范围限制，沿着的分频器的灵敏度曲线。据我们所知，这是第一个报告分析的动态范围的分频器的实验结果的基础上。
We present the design, implementation, and measurement of a fully integrated wide-band (3.3GHz-4GHz) CMOS VCOs and frequency divider, as well as the analysis and comparison of VCO topologies for their uniform phase noise performance in the wide tuning range. In addition, the dynamic range of the frequency divider is analyzed based on experimental results for the first time. The different VCO topologies have been investigated by using the measured results. It is demonstrated that the NMOS-PMOS VCO (NP-core VCO) without a current source has as low as 2dB of phase noise variation in the entire tuning range of 650MHz as well as achieving superior phase noise performance of -118.5 dBc/Hz at 1MHz offset compared to the NMOS VCO (N-core VCO) which shows severe phase noise degradation of 17dB due to AM-FM conversion in the high varactor gain region. A frequency divider is designed to generate the quadrature signal for direct conversion. The measured results exhibit the dynamic range limit of the frequency divider along with sensitivity curve of the divider. To the best of our knowledge, this is the first report analyzing the dynamic range of the frequency divider based on the experimental results.