Abstract: This paper presents a fully integrated wideband LC voltage-controlled oscillator (VCO) with small tuning gain fluctuation.This VCO is designed for a dual-conversion low-IF architecture (DLIF) DTV tuner.A switched varactor array is proposed to suppress tuning gain fluctuation for the performance of the phase locked loop (PLL).The whole VCO was implemented in a 0.18μm CMOS process.The measured results show -126dBc/Hz phase noise at 1MHz offset frequency.The measured tuning range is 860MHz (53.8%) from 1.17 to 2.03GHz with the tuning gain from 69 to 93MHz/V.Power consumption is about 9mW with a 1.5V supply voltage.
Key words: wideband, tuning gain, switched capacitor array, switched varactor array, differentially tuned, VCO
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Received: 18 August 2015 Revised: 08 November 2007 Online: Published: 01 May 2008
| Citation: |
Yuan Lu, Tang Zhangwen, Min Hao. A Wideband LC-VCO with Small Tuning Gain Fluctuation[J]. Journal of Semiconductors, 2008, 29(5): 1003-1009.
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Yuan L, Tang Z W, Min H. A Wideband LC-VCO with Small Tuning Gain Fluctuation[J]. J. Semicond., 2008, 29(5): 1003.
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