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Low power 13 Gbit/s VCSEL current driver in 0.18 μm CMOS for optical interconnection

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The Journal of China Universities of Posts and Telecommunications 2013年第2期20卷 125-128页

作者： chen ying-mei WANG Jin-fei ZHANG Li LI Wei Institute of Radio Frequency & Optical Electronic Integrated Circuits Southeast University

A design of 13 Gbit/s vertical cavity surface emitting laser （VCSEL） driver using 0.18 μm complementary metal oxide semiconductor （CMOS） technology is presented in this paper. The core unit of the driver consists of pre-amplify stage and output stage circuit. Techniques of three stages differential amplifier with low impedance load and active feedback are employed in pre-amplify stage, and technique of C3A is adopted in output stage to acquire low power consumption and high speed. The experimental results show that the circuit can work at the data rate of 10 Gbit/s and maximum of 13.2 Gbit/s. The output modulation current is up to 12.5 mA and the power dissipation is only 68 mW with a 1.8 V power supply.

关键词： VCSEL CMOS laser current driver active feedback

A 40 Gbit/s fully integrated optical receiver analog front-end in 90 nm CMOS

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The Journal of China Universities of Posts and Telecommunications 2012年第1期19卷 124-128页

作者： XU Zhi-gang chen ying-mei WANG Tao chen Xue-hui ZHANG Li Institute of RF-&OE-ICs Southeast UniversityNanjing 210096China

A fully integrated 40 Gbit/s optical receiver analog front-end （AFE） including a transimpedance amplifier （TIA） and a limiting amplifier （LA） for short distance communication is described in this paper. The proposed TIA employs a modified regulated cascode （RGC） configuration as input stage, and adopts a third order interleaving active feedback gain stage. The LA utilizes nested active feedback, negative capacitance, and inductor peaking technology to achieve high voltage gain and wide bandwidth. The tiny photo current received by the receiver AFE is amplified to a single-ended voltage swing of 200 mV（p-p）. Simulation results show that the receiver AFE provides conversion gain of up to 83 dBΩ and bandwidth of 34.7 GHz, and the equivalent input noise current integrated from 1 MHz to 30 GHz is about 6.6 μA（rms）.

关键词： optical receiver transimpedance amplifier limiting amplifier active feedback negative capacitance inductor peaking

统防统治对茶农农药减量的影响研究:基于福建和浙江的实证分析

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生态与农村环境学报 2024年第8期40卷 1029-1037页

作者：陈梅英王力加汤晓玉何秀玲雷国铨盛建刚福建农林大学经济与管理学院福建福州350002 福建农林大学乡村振兴学院福建福州350002 福建农林大学马克思主义学院福建福州350002 福建农林大学数字经济学院福建泉州362400 烟台市投资促进中心山东烟台264000

病虫害统防统治能带动农药大面积减量增效,对推进农业高质量发展具有重要意义。基于福建省与浙江省530户茶叶种植户的微观调查数据,采用内生转换模型实证分析了茶农采纳统防统治对农药使用行为的影响及其作用机制。研究结果表明:(1)茶... 详细信息

病虫害统防统治能带动农药大面积减量增效,对推进农业高质量发展具有重要意义。基于福建省与浙江省530户茶叶种植户的微观调查数据,采用内生转换模型实证分析了茶农采纳统防统治对农药使用行为的影响及其作用机制。研究结果表明:(1)茶农统防统治的采纳受到不同因素的影响,茶农年龄越小、身体健康状况越差,越偏好风险和越倾向于采纳统防统治。(2)统防统治的采纳能够显著减少茶农的农药使用量。若已采纳统防统治的茶农不采纳统防统治,每667 m 2的平均农药支出将会增加31.02%;若未采纳统防统治的茶农采纳统防统治,其每667 m 2的平均农药支出将会下降12.32%。(3)统防统治的采纳能够显著增加茶农的收入。若采纳统防统治的茶农不采纳统防统治,其家庭年人均总收入将下降59.23%;若未采纳统防统治的茶农能够采纳统防统治,其家庭年人均总收入将增加32.60%。研究结论对农户采纳统防统治、实现农药减量、推动现代农业绿色高质量发展、实现农户增收具有重要意义。

关键词：统防统治农药使用行为农药减量农户增收内生转换模型

Jitter analysis and modeling of a 10 Gbit/s SerDes CDR and jitter attenuation PLL

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The Journal of China Universities of Posts and Telecommunications 2011年第6期18卷 122-126页

作者： WANG Hui chen ying-mei YI Lv-fan WEN Guan-guo Institute of RF- ＆ OE-ICs Southeast University Nanjing 210096 China Zhongxing Telecom Equipment Corporation Shenzhen 518055 China

Jitter analysis and a linear model is proposed in this paper which predicts the characteristics of serial-deserial （SerDes） clock and data recovery circuit, and the characteristics include jitter transfer, jitter tolerance and jitter generation are particularly analyzed. The simulation results of the clock data recovery （CDR） model show that the jitter specifications exceed the mask of ITU-T optical transport network （OTN） G.8251 recommendations. The whole systems are validated by 9.95-11.5 Gbit/s CDR and the jitter attenuation phase locked loops （PLL） circuits using TSMC 65 nm CMOS technology.

关键词： OTN SerDes Jitter CDR PLL

Design of 10 GHz eight-phase voltage controlled oscillator in 90nm CMOS

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The Journal of China Universities of Posts and Telecommunications 2012年第6期19卷 113-117页

作者： chen ying-mei WANG Hui YAN Shuang-chao ZHANG Li LI Wei Institute of Radio Frequency and Optical Electronic Integrated Circuits Southeast University

A novel 10 GHz eight-phase voltage-controlled oscillator （VCO） architecture applied in clock and data recovery （CDR） circuit for 40 Gbit/s optical communications system is proposed. Compared with the traditional eight-phase oscillator, a new ring CL ladder filter structure with four inductors is proposed. The VCO is designed and fabricated in IBM 90 nm complementary metal-oxide-semiconductor transistor （CMOS） technology. Measurement results show the tuning range is 9.2 GHz-11.0 GHz and the phase noise of - 108.85 dBc/Hz at 1 MHz offset from the carrier frequency of 10 GHz. The chip area of VCO is 500 μm × 685 μm and the power dissipation is 17.4 mW with the 1.2 V supply voltage.

关键词： VCO eight-phase LC ring oscillator CL ladder filtering

Design of an L1 band low noise single-chip GPS receiver in 0.18 μm CMOS technology

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The Journal of China Universities of Posts and Telecommunications 2010年第3期17卷 60-65页

作者： chen ying-mei LI Zhi-qun WANG Zhi-gong JING Yong-kang ZHANG Li Institute of Radio Frequency and Electronic Integrated Circuits Southeast University Nanjing 210096 China

This article presents an L1 band low noise integrated global positioning system （GPS） receiver chip using 0.18 μm CMOS technology. Dual-conversion with a low-IF architecture was used for this GPS receiver. The receiver is composed of low noise amplifier （LNA）, down-conversion mixers, band pass filter, received signal strength indicator, variable gain amplifier, programmable gain amplifier, ADC, PLL frequency synthesizer and other key blocks. The receiver achieves a maximum gain of 105 dB and noise figure less than 6 dB. The variable gain amplifier （VGA） and programmable gain amplifier （PGA） provide gain control dynamic range over 50 dB. The receiver consumes less than 160 mW from a 1.8 V supply while occupying a 2.9 mm2 chip area including the ESD I/O pads.

关键词： CMOS RF receiver GPS low IF satellite communications wireless communications

Transferring a Multi-atom Entangled State via Adiabatic Passage

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Communications in Theoretical Physics 2007年第5期47卷 816-820页

作者： LIN Xiu chen mei-ying LIN Xiu-Min LI Hong-Cai YANG Rong-Can School of Physics and OptoElectronics Technology Fujian Normal University Fuzhou 350007 China

We present a scheme for transferring atomic entangled states via adiabatic passage. In the scheme, we use photons to achieve efficient quantum transmission among spatially distant atoms. The probability of the successful transferring quantum state approaches 1. Meanwhile, the scheme is robust against the effects of atomic spontaneous emission.

关键词： quantum state transfer atomic entangled state cavity QED

Evaluation of the effects of health education interventions for hypertensive patients based on the health belief model

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World Journal of Clinical Cases 2024年第15期12卷 2578-2585页

作者： Hong-mei Wang ying chen Yan-Hua Shen Xiao-mei Wang Department of Emergency Lishui Second People's HospitalLishui 323000Zhejiang ProvinceChina Department of Pancreatic and Biliary Surgery The First Affiliated Hospital of China Medical UniversityShenyang 110002Liaoning ProvinceChina

BACKGROUND Hypertension is a major risk factor for cardiovascular disease and stroke,and its prevalence is increasing *** education interventions based on the health belief model(HBM)can improve the knowledge,attitudes,and behaviors of patients with hypertension and help them control their blood *** To evaluate the effects of health education interventions based on the HBM in patients with hypertension in *** Between 2021 and 2023,140 patients with hypertension were randomly assigned to either the intervention or control *** intervention group received health education based on the HBM,including lectures,brochures,videos,and counseling sessions,whereas the control group received routine *** were measured at baseline,three months,and six months after the intervention and included blood pressure,medication adherence,self-efficacy,and perceived benefits,barriers,susceptibility,and *** The intervention group had significantly lower systolic blood pressure[mean difference(MD):-8.2 mmHg,P<0.001]and diastolic blood pressure(MD:-5.1 mmHg,P=0.002)compared to the control group at six *** intervention group also had higher medication adherence(MD:1.8,P<0.001),self-efficacy(MD:12.4,P<0.001),perceived benefits(MD:3.2,P<0.001),lower perceived barriers(MD:-2.6,P=0.001),higher perceived susceptibility(MD:2.8,P=0.002),and higher perceived severity(MD:3.1,P<0.001)than the control group at six *** Health education interventions based on the HBM effectively improve blood pressure control and health beliefs in patients with hypertension and should be implemented in clinical practice and community settings.

关键词： Hypertension Health education Health belief model Blood pressure control Randomized controlled trial

Effect of short neuropeptide F signaling on larval feeding in Mythimna separata

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Insect Science 2024年第2期31卷 417-434页

作者： mei-mei Li Qi Yang Li-Hui chen Yan-ying Li Jun-Xiang Wu Xiang-Li Xu State Key Laboratory of Crop Stress Biology in Arid Areas College of Plant ProtectionNorthwest A&F UniversityYanglingShaanxi ProvinceChinaand School of Agricultural Sciences Jiangxi Agricultural UniversityNanchangChina

Mythimna separata is a notorious phytophagous pest which poses serious threats to cereal crops owing to the gluttony of the *** short neuropeptide F(sNPF)and its receptor sNPFR are involved in a diversity of physiological functions,especially in functions related to feeding in insects,it is a molecular target for pest ***,an sNPF and 2 sNPFRs were identified and cloned from *** analysis revealed that the sNPF and its receptors had a highly conserved RLRFamide C-terminus and 7 transmembrane domains,*** sNPF and its receptor genes were distributed across larval periods and tissues,but 2 receptors had distinct expression *** starvation-induced assay elucidated that sNPF and sNPFR expression levels were downregulated under food deprivation and recovered with subsequent *** interference knockdown of sNPF,sNPFR1,and sNPFR2 by injection of double-stranded RNA into larvae not only suppressed food consumption and increased body size and weight,but also led to decrease of glycogen and total lipid contents,and increase of trehalose compared with double-stranded green fluorescent protein ***,molecular docking was performed on the interaction mode between sNPFR protein and its ligand sNPF based on the 3-dimensional models constructed by AlphaFold;the results indicated that both receptors were presumably activated by the mature peptide *** results revealed that sNPF signaling played a considerably vital role in the feeding regulation of *** and represents a potential control target for this pest.

关键词： feeding regulation Mythimna separata pest control target RNA interference short neuropeptide F sNPF receptors