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A 2.4 GHz high-linearity low-phase-noise CMOS LC-VCO based on capacitance compensation

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Journal of Semiconductors 2010年第7期31卷 96-101页

作者：李振荣庄奕琪李兵靳刚靳钊 Key Laboratory of the Ministry of Education for Wide Band-Gap Semiconductor Materials and Devices School of MicroelectronicsXidian University

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 *** 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 *** to the conventional VCO,the proposed VCO has more constant gain over the entire tuning *** 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 *** power dissipation is 2.1 mW from a 1.8 V power *** active area of this VCO is 500×810μm^2.

关键词： switched-capacitor varactor VCO phase noise tuning range linearity

A 1.8-2.6 GHz CMOS VCO with switched capacitor array and switched inductor array

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Journal of Semiconductors 2010年第2期31卷 29-32页

作者：王小松黄水龙陈普锋张海英 Institute of Microelectronics.Chinese Academy of Sciences

The design of a 1.76-2.56 GHz CMOS voltage-controlled oscillator（VCO） with switched capacitor array and switched inductor array is *** in 0.18μm 1P6M CMOS technology,the VCO achieves a 37% frequency tuning *** measured phase noise varies between -118.5 dBc/Hz and -122.8 dBc/Hz at 1 MHz offset across the tuning *** consumption is about 14.4 mW with a 1.8 V *** on a reconfigurable LC tank with switched capacitor array and switched inductor array,the tuning range is analyzed and derived in terms of design parameters,yielding useful equations to guide the circuit design.

关键词： tuning range phase noise MOS VCO switched capacitor array switched inductor array

Numerical study of laser-induced collision process in Eu-Sr in strong field

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Science China(Physics,Mechanics & Astronomy) 2005年第1期48卷 78-88页

作者： ZHANG Hongying XlAYuanqin CHEN Deying XIAO Pan FAN Rongwei MA Zuguang State Key Laboratory of Tunable Laser Technology Institute of Opto-ElectronicsHarbin Institute of TechnologyHarbin 150001China

Theoretically based on the four-level model,one LICET process in Eu-Sr system in both weak and strong fields was calculated by immediate numerical *** results in weak field are in fair to good agreement with analytical *** results in strong field show that:(a)the peak of the LICET profiles moves to the violet side and the tuning range of the profiles obviously becomes narrower when the laser field intensity increases;and(b)numerical results in strong field differ a lot from analytical ones,which indicates that in strong field,the analytical expressions are not applicable any longer.

关键词： laser-induced collisional energy transfer(LICET) tuning range cross section strong field effect.

A 3.01–3.82 GHz CMOS LC voltage-controlled oscillator with 6.29% VCO-gain variation for WLAN applications

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Journal of Semiconductors 2014年第7期35卷 125-131页

作者：刘小龙张雷张莉王燕余志平 Institute of Microelectronics Tsinghua University

A wideband low-phase-noise LC voltage-controlled oscillator （VCO） with low VCO gain （Kvco） vari- ation for WLAN fractional-N frequency synthesizer application is proposed and designed on a 0.13-μm CMOS process. In order to achieve a low Kvco variation, an extra switched varactor array was added to the LC tank with the conventional switched capacitor array. Based on the proposed switched varactor array compensation technique, the measured Kvco is 43 MHz/V with only 6.29% variation across the entire tuning range. The proposed VCO provides a tuning range of 23.7% from 3.01 to 3.82 GHz, while consuming 9 mA of quiescent current from a 2.3 V supply. The VCO shows a low phase noise of-121.94 dBc/Hz at 1 MHz offset, from the 3.6 GHz carrier.

关键词： LC VCO VCO gain (Kvco) low Kvco variation tuning range phase noise CMOS

THEORETICAL STUDY OF QUASI CONTINUOUSLY TUNABLE OPTICALLY PUMPED NH3 LASER

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THEORETICAL STUDY OF QUASI CONTINUOUSLY TUNABLE OPTICALLY PU...