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Research on Column FPN and Black Level Calibration in Large Array CMOS Image Sensor

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Chinese Journal of Electronics 2021年第2期30卷 268-274页

作者： GUO Zhongjie YU Ningmei wu longsheng School of Automation and Information Engineering Xi'an University of Technology Xi'an Microelectronic Technology Institute

A technical investigation, research and implementation is presented to correct column fixed pattern noise and black level in large array Complementary metal oxide semiconductor(CMOS) image sensor. Through making a comparison among reported solution, and give large array CMOS image sensor design and considerations,according to our previous analysis on non-ideal factor and error source of piecewise Digital to analog converter(DAC) in multi-channels, an improving accurate piecewise DAC with adaptive switch technique is developed. The research theory has verified by a high dynamic range and low column Fixed pattern noise(FPN) CMOS image sensor prototype chip, which consisting of 8320×8320 pixel array was designed and fabricated in 55 nm CMOS 1P4M standard process. The chip active area is 48 mm×48 mm with a pixel size of 5.7μm×5.7μm. The measured results achieved a high intrinsic dynamic range of 75 d B, a low FPN and black level of 0.06%, a low photo response non-uniformity of 1.5% respectively, and an excellent raw sample image taken by the prototype sensor.

关键词： fixed pattern noise digital-analog converter CMOS 1P4M standard process complementary metal oxide semiconductor image sensor photoresponse nonuniformity size 55.0 nm size 48.0 mm large array CMOS image sensor prototype sensor CMOS image sensors black level calibration calibration

A radiation-hardened-by-design technique for suppressing SET in charge pump of PLL frequency synthesizer

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Science China(Technological Sciences) 2013年第2期56卷 286-292页

作者： HAN BenGuang GUO ZhongJie WANG XiHu wu longsheng LIU YouBao Xi'an Microelectronic Technology Institute

This paper presents a single event transient(SET) suppressor circuit,which can suppress the effect of SET in charge pump(CP) on the whole PLL frequency synthesizers,and at the same time it brings little negative effect to the system during normal *** the proposed SET suppressor circuit only includes a resistor,a PMOS and an NMOS device,little area penalty is *** preventing SET propagating from CP to low pass filter(LPF) and VCO when a single event strikes on CP output node,the system shows excellent hardness to SET in *** simulations are performed on TCAD *** results show that a single event with an LET at 80 MeV cm 2 /mg can only induce approximately 2.3 mV disturbance on the control voltage of VCO.

关键词： radiation-hardened-by-design (RHBD) single event (SE) single event transient (SET) radiation effects phase-lockedloops frequency synthesizer

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Design, Synthesis and Antitumor Activity of Novel 6,7-Dimethoxyquinazoline Derivatives Containing Diaryl Urea Moiety

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Chemical Research in Chinese Universities 2015年第5期31卷 766-773页

作者： HOU Yunlei wu Shasha MA longsheng BAI Jinying LIU Zijian ZHAO Yanfang Key Laboratory of Structure-based Drug Design and Discovery Ministry of Education Shenyang Pharmaceutical University Shenyang 110016 P R. China

A series of 6,7-dimethoxyquinazoline derivatives connected by diaryl urea scaffolds was designed, synthesized and their in vitro antitumor activities were evaluated. Most of them showed an excellent potency against the four tested cancer cell lines as compared with sorafenib. Particularly, a promising compound 20 was identified, which showed the most potent antitumor activities with IC50 values of 0.08, 0.09, 0.16 and 0.19 μmol/L against H460, HT-29, MKN-45 and MDA-MB-231 cell lines, respectively. The structure-activity relationship（SAR） analysis indicated that compounds with dimethylamino or diethylamino group at the C4 position of 6,7-dimethoxyquinazoline moiety exhibited superior activities than compounds bearing morpholino groups.

关键词： 6,7-Dimethoxyquinazoline derivative Diaryl urea scaffold Cytotoxic activity

LOW-POWER LVDS I/O INTERFACE FOR ABOVE 2GB/S-PER-PIN OPERATION

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Journal of Electronics(China) 2009年第4期26卷 525-531页

作者： Wang Xihu wu longsheng Liu Youbao Xi＇an Microelectronic Technology Institute Xi＇an 710054 China

Low Voltage Differential Signaling (LVDS) has become a popular choice for high-speed serial links to conquer the bandwidth bottleneck of intra-chip data transmission. This paper presents the design and the implementation of LVDS Input/Output (I/O) interface circuits in a standard 0.18 μm CMOS technology using thick gate oxide devices (3.3 V), fully compatible with LVDS standard. In the proposed transmitter, a novel Common-Mode FeedBack (CMFB)circuit is utilized to keep the common-mode output voltage stable over Process, supply Voltage and Temperature (PVT) variations. Because there are no area greedy resistors in the CMFB circuitry, the disadvantage of large die area in existing transmitter structures is avoided. To obtain sufficient gain, the receiver consists of three am- plifying stages: a voltage amplifying stage, a transconductance amplifying stage, and a transimpedance amplifying stage. And to exclude inner nodes with high RC time constant, shunt-shunt negative feedback is introduced in the receiver. A novel active inductor shunt peaking structure is used in the receiver to fulfill the stringent requirements of high speed and wide Common-Mode Input Region (CMIR) without voltage gain, power dissipation and silicon area penalty. Simulation results show that data rates of 2 Gbps and 2.5 Gbps are achieved for the transmitter and receiver with power con- sumption of 13.2 mW and 8.3 mW respectively.

关键词： Input/Output (I/O) Low Voltage Differential Signaling (LVDS) Transmitter Receiver Active inductor shunt peaking

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Analysis of single event transient pulse-width in 65 nm commercial radiation-hardened logic cell

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Journal of Semiconductors 2017年第8期38卷 100-104页

作者： Haisong Li longsheng wu Bo Yang Yihu Jiang Xi'an Microelectronics Technology Institute

With the critical charge reduced to generate a single event effect （SEE） and high working frequency for a nanometer integrated circuit, the single event effect （SET） becomes increasingly serious for high performance SOC and DSP chips. To analyze the radiation-hardened method of SET for the nanometer integrated circuit, the n＋ guard ring and p＋ guard ring have been adopted in the layout for a 65 nm commercial radiation-hardened standard cell library. The weakest driving capacity inverter cell was used to evaluate the single event transient （SET） pulse-width distribution. We employed a dual-lane measurement circuit to get more accurate SET＇s pulse- width. Six kinds of ions, which provide LETs of 12.5, 22.5, 32.5, 42, 63, and 79.5 MeV-cm2/mg, respectively, have been utilized to irradiate the SET test circuit in the Beijing Tandem Accelerator Nuclear Physics National Laboratory. The testing results reveal that the pulse-width of most SETs is shorter than 400 ps in the range of LETefr from 12.5 ***2/mg to 79.5 MeV-cm2/mg and the pulse-width presents saturation tendency when the effective linear energy transfer （LETeff value is larger than 40 MeV-cm2/mg. The test results also show that the hardened commercial standard cell＇s pulse-width concentrates on 33 to 264 ps, which decreases by 40% compared to the pulse-width of the 65 nm commercial unhardened standard cell.

关键词： single event effect single event transient radiation-hardened guard ring, standard cell library pulsewidth

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A high consistency ramp circuit design method for negative feedback adaptive adjustment mechanism applied to large area array CMOS image sensors

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Science China(Information Sciences) 2024年第12期67卷 337-338页

作者： Zhongjie GUO Lin LI Ruiming XU Suiyang LIU Ningmei YU Yuan YANG longsheng wu Department of Electronics Xi'an University of Technology School of Microelectronics Xidian University

Generally speaking, the column level ADC provides ramp signals for each column in the way of global ramp [1]. At present, the scale of the high-end image sensor array has reached tens of millions, hundreds of millions... 详细信息

关键词： CMOS integrated circuits

Discussion on Agricultural Religion in the Pre-Qin Period of China

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Asian Agricultural Research 2017年第3期9卷 112-114页

作者： longsheng wu Railway Police College

Since ancient times,agricultural religion has been infiltrated into all aspects of economic,political and social life in China. Using rich historical data such as archeology,anthropology and ethnology,this paper discussed the historical process of agricultural religion in the pre-Qin period from animal worship to agricultural worship. It also discussed the agricultural objects,land,celestial nature,and labor ***,it revealed the inevitable trend of combination of social sacrificing activities.

关键词： The pre-Qin period Agricultural religion Worship

On the Relationship between Chinese Taoist Rites and Agriculture

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Asian Agricultural Research 2017年第5期9卷 105-107页

作者： longsheng wu Railway Police College

There is a close relationship between Taoism and traditional agriculture in China. This relationship is also manifested in the relationship between Taoist rites and agriculture: the Taoist rites have obvious awareness of stressing the agriculture; holding of Taoist rites,gods worshiped in rites,offerings used,and grain consumed are connected with the agriculture; many actions in rites have nature of imitating the agriculture. The concept of " quietness" and " cleanness" in rites can cultivate the awareness of farmers for respecting the agriculture.

关键词： China Taoist rites Agriculture

Brief Analysis of Religious Sacrificial Activities in Agricultural Production of Ethnic Minorities in China

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Asian Agricultural Research 2017年第4期9卷 96-98页

作者： longsheng wu Railway Police College

China is vast in territory and there are 55 ethnic minorities. Due to the geographical location,the experience in the development process and the stage of cultural development,ethnic minorities show great differences with Han people in many aspects,so that in the process of obtaining food,they manifest different cultural characteristics,especially the religious sacrifices and taboos present in the agricultural production process show more uniqueness and retain more primitive features.

关键词： Ethnic minorities in China Agricultural production Religion and sacrifice