| Citation: |
Zhang Li, Chi Baoyong, Yao Jinke, Wang Zhihua, Chen Hongyi. A 2GHz Low Power Differentially Tuned CMOS Monolithic LC-VCO[J]. Journal of Semiconductors, 2006, 27(9): 1543-1547.
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Zhang L, Chi B Y, Yao J K, Wang Z H, Chen H Y. A 2GHz Low Power Differentially Tuned CMOS Monolithic LC-VCO[J]. Chin. J. Semicond., 2006, 27(9): 1543.
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A 2GHz Low Power Differentially Tuned CMOS Monolithic LC-VCO
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Abstract
A 2GHz differentially tuned CMOS monolithic LC-VCO is designed and fabricated in a 0.18μm CMOS process.The VCO has a 16.15% tuning range (from 1.8998 to 2.2335GHz) through a combination of analog and digital tuning techniques (4-bit binary switch-capacitor array).The measured phase noise is -118.17dBc/Hz at a 1MHz offset from a 2.158GHz carrier.With the presented improved switch,the phase noise varies no more than 3dB at different digital control bits.The phase noise changes only by about 2dB in the tuning range because of the pn-junctions as the varactors.The VCO draws a current of about 2.1mA from a 1.8V power supply and works normally with a 1.5V power supply.-
Keywords:
- binary switchable-capacitor array,
- CMOS,
- differentially tuned,
- phase noise,
- VCO
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References
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Proportional views
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