| Citation: |
Wu Xiushan, Wang Zhigong, Li Zhiqun, Xia Jun, Li Qing. Design and realization of an ultra-low-power low-phase-noise CMOS LC-VCO[J]. Journal of Semiconductors, 2010, 31(8): 085007. doi: 10.1088/1674-4926/31/8/085007
Wu X S, Wang Z G, Li Z Q, Xia J, Li Q. Design and realization of an ultra-low-power low-phase-noise CMOS LC-VCO[J]. J. Semicond., 2010, 31(8): 085007. doi: 10.1088/1674-4926/31/8/085007.
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Design and realization of an ultra-low-power low-phase-noise CMOS LC-VCO
doi: 10.1088/1674-4926/31/8/085007
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Abstract
A fully integrated cross-coupled LC tank voltage-controlled oscillator (LC-VCO) using transformer feedback is proposed to achieve a low phase noise and ultra-low-power design even at a supply below the threshold voltage. The ultra-low-power VCO is implemented in the mixed-signal and RF 1P6M 0.18-μ m CMOS technology of SMIC. The measured phase noise is –125.3 dBc/Hz at an offset frequency of 1 MHz from a carrier of 2.433 GHz, while the VCO core circuit draws only 640 μ W from a 0.4-V supply. The designed VCO can cover a frequency range from 2.28 to 2.48 GHz. The tuning range of the circuit is 200 MHz (8.7%) and the FOM is –195.7 dB, which is suitable for an IEEE 802.11b receiver. -
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