| Citation: |
Li Zhenrong, Zhuang Yiqi, Li Bing, Jin Gang, Jin Zhao. A 2.4 GHz high-linearity low-phase-noise CMOS LC-VCO based on capacitance compensation[J]. Journal of Semiconductors, 2010, 31(7): 075005. doi: 10.1088/1674-4926/31/7/075005
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Li Z R, Zhuang Y Q, Li B, Jin G, Jin Z. A 2.4 GHz high-linearity low-phase-noise CMOS LC-VCO based on capacitance compensation[J]. J. Semicond., 2010, 31(7): 075005. doi: 10.1088/1674-4926/31/7/075005.
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A 2.4 GHz high-linearity low-phase-noise CMOS LC-VCO based on capacitance compensation
DOI: 10.1088/1674-4926/31/7/075005
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Abstract
A 2.4 GHz high-linearity low-phase-noise cross-coupled CMOS LC voltage-controlled oscillator (VCO) is implemented in standard 0.18-μm CMOS technology. An equalization structure for tuning sensitivity base on the three-stage distributed biased switched-varactor bank and the differential switched-capacitor bank is adopted to reduce the variations of the VCO gain, achieve high linearity, and optimize the phase-noise performance. Compared to the conventional VCO, the proposed VCO has more constant gain over the entire tuning range. The tuning range is about 18.7% from 2.23 to 2.69 GHz, and the phase noise is -95 dBc/Hz at 100-kHz offset and -117 dBc/Hz at 1-MHz offset from the carrier frequency of 2.42 GHz. The power dissipation is 2.1 mW from a 1.8 V power supply. The active area of this VCO is 500 × 810 μm2.-
Keywords:
- switched-capacitor,
- varactor,
- VCO,
- phase noise,
- tuning range,
- linearity
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References
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Proportional views
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