| Citation: |
Cao Shengguo, Yang Yuqing, Tan Xi, Yan Na, Min Hao. A 5 GHz CMOS frequency synthesizer with novel phase-switching prescaler and high-Q LC-VCO[J]. Journal of Semiconductors, 2011, 32(8): 085006. doi: 10.1088/1674-4926/32/8/085006
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Cao S G, Yang Y Q, Tan X, Yan N, Min H. A 5 GHz CMOS frequency synthesizer with novel phase-switching prescaler and high-Q LC-VCO[J]. J. Semicond., 2011, 32(8): 085006. doi: 10.1088/1674-4926/32/8/085006.
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A 5 GHz CMOS frequency synthesizer with novel phase-switching prescaler and high-Q LC-VCO
DOI: 10.1088/1674-4926/32/8/085006
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Abstract
A phase-locked loop (PLL) frequency synthesizer with a novel phase-switching prescaler and a high-Q LC voltage controlled oscillator (VCO) is presented. The phase-switching prescaler with a novel modulus control mechanism is much more robust on process variations. The Q factor of the inductor, I-MOS capacitors and varactors in the VCO are optimized. The proposed frequency synthesizer was fabricated by SMIC 0.13 μm 1P8M MMRF CMOS technology with a chip area of 1150 × 2500 μm2. When locking at 5 GHz, the current consumption is 15 mA from a supply voltage of 1.2 V and the measured phase noise at a 1 MHz offset is –122.45 dBc/Hz.-
Keywords:
- PLL frequency synthesizer
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References
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