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Research on Secondary Electron Emission Yield Intellectualized Testing System of Space Materials Based on Kingview and PLC

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Chinese Journal of Electronics 2014年第3期23卷 635-638页

作者： chang tianhai YIN Peipei School of Electronic and Information Engineering South China University of Technology

This paper describes an intellectualized testing system of the secondary electron emission yield of space materials by combining the technology of electronic control and communication. This system is based on Kingview 6.52 and PLC. The system achieves the document multithreading intellectualized control of vacuum obtaining, pulse modulation of electron gun and on-off of all power sources. The application of Kingview 6.52 makes the design of system more convenient and improves the control quality. The communication with PLC through serial interface improves the ability of data collection and real-time disposing of industry personal computers.

关键词： Secondary electron emission Space materials Programmable logic controller(PLC) Kingview

Capacity and Flexibility Improvement of Traffic Aggregation for Fixed 5G:Key Enabling Technologies,Challenges and Trends

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China Communications 2022年第12期19卷 1-13页

作者： Jing Zhang tianhai chang Zhuqiang Zhong Xianqing Jin Shaohua Hu Taowei Jin Jiahao Zhou Mingyue Zhu Yi Yu Jianming Tang Liangchuan Li Kun Qiu School of Communication and Information Engineering University of Electronic Science and Technology of ChinaChengduSichuan 611731China Optical Research Dept Huawei Technologies518129ShenzhenChina School of Electronic Engineering Bangor UniversityBangorLL571UTUK

As the emergence of various highbandwidth services and the requirements to support 5G/Wi-Fi 6 wireless networks,the next generation fixed networks,i.e.F5G,are expected to be realized in the 5G era.F5G is endowed with new characteristics,including ultra-high bandwidth,all-optical connections and optimal service *** the prospect of optical-to-everywhere,optical technologies are used for mobile front-haul,mid-haul,and *** access networks would play an important role in F5G to support radio access network and fixed access ***-latency PON is a key for cost effective-haul traffic *** terms of signal transmission,intensity modulation directdetection(IM-DD)is a promising scheme due to its simple *** fundamental challenge associated with direct-detection is the disappearance of the transmitted signal’s *** access network,the flexibility and low latency are the two key factors affecting service *** this article,we review the evolution of PONs and the challenges of current PONs in *** analyze key enabling digital signal processing(DSP)techniques,including detection linearization for direct-detection and simplified coherent detection,adaptive equalizers,digital filer enabled flexible access network and low-latency inter-ONU ***,we discuss the developing trends of future optical access networks.

关键词： optical fiber communication flexible access network optical field recovery inter-ONU communication

OFDM系统中非线性放大器的改进预失真技术

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电光与控制 2011年第1期18卷 61-65页

作者：秦川常天海华南理工大学电子与信息学院广州510640

针对OFDM系统中非线性放大器对信号造成的非线性失真影响,采用基于查询表的自适应预失真技术对其进行矫正。在基于最小均方误差算法的经典自适应预失真算法的基础上,采用线性内插算法来更新查询表的内容,从而提高自适应预失真算法的矫... 详细信息

针对OFDM系统中非线性放大器对信号造成的非线性失真影响,采用基于查询表的自适应预失真技术对其进行矫正。在基于最小均方误差算法的经典自适应预失真算法的基础上,采用线性内插算法来更新查询表的内容,从而提高自适应预失真算法的矫正效果;结合OFDM符号的概率分布特性,提出一种增加较大幅度OFDM信号迭代次数的方法,来提高预失真算法的收敛速度。仿真结果表明,改进的预失真算法改善了对非线性功率放大器造成的非线性失真的矫正效果,提高了算法本身的收敛速度。

关键词：正交频分复用非线性放大器自适应预失真

一种5~6 GHz宽带全集成CMOS低噪声放大器

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微电子学 2022年第3期52卷 358-362页

作者：桂小琰赵振常天海任志雄景磊王祥西安交通大学电信学院西安710049 西安交通大学微电子学院西安710049 华为技术有限公司广东东莞523808

采用55 nm标准CMOS工艺,设计并流片实现了一种应用于Wi-Fi 6(5 GHz)频段的宽带全集成CMOS低噪声放大器(LNA)芯片,包括源极退化共源共栅放大器、负载Balun及增益切换单元。在该设计中,所有电感均为片上实现;采用Balun负载,实现信号的单... 详细信息

采用55 nm标准CMOS工艺,设计并流片实现了一种应用于Wi-Fi 6(5 GHz)频段的宽带全集成CMOS低噪声放大器(LNA)芯片,包括源极退化共源共栅放大器、负载Balun及增益切换单元。在该设计中,所有电感均为片上实现;采用Balun负载,实现信号的单端转差分输出;具备高低增益模式,以满足输入信号动态范围要求。测试结果表明,在高增益模式下该放大器的最大电压增益为20.2 dB,最小噪声系数为2.2 dB;在低增益模式下该放大器的最大电压增益为15 dB,最大输入1 dB压缩点为-3.2 dBm。芯片核心面积为0.28 mm~2,静态功耗为10.2 mW。

关键词：低噪声放大器巴伦高低增益模式 Wi-Fi 6

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ITO薄膜的磁控溅射工艺优化研究

真空科学与技术学报 2009年第3期29卷 324-327页

作者：常天海孙凯华南理工大学电子与信息工程学院广州510640 上海曙光机械制造厂有限公司上海200127

通过磁控溅射陶瓷靶制备ITO薄膜的工艺实验,研究了基底温度、溅射电压、氧含量等主要工艺参数对该薄膜光电性能的影响。实验结果表明:当基底加热温度为295℃、溅射电压为250V、氧分压占镀膜室总压力的8%即主要工艺参数皆位于最佳范围时... 详细信息

通过磁控溅射陶瓷靶制备ITO薄膜的工艺实验,研究了基底温度、溅射电压、氧含量等主要工艺参数对该薄膜光电性能的影响。实验结果表明:当基底加热温度为295℃、溅射电压为250V、氧分压占镀膜室总压力的8%即主要工艺参数皆位于最佳范围时,在厚度为5mm的普通浮法玻璃基底上,可制备出表面电阻为18Ω、可见光透过率超过80%的ITO薄膜。XPS测试结果表明:该ITO薄膜的内部Sn以SnO2相存在,In以In2O3相存在,含量分别在5.8%和85%左右。

关键词： ITO 光电性能磁控溅射工艺优化 XPS

一种单开关多路均流输出LED驱动电路的分析与设计

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电子技术应用 2017年第8期43卷 144-146,150页

作者：魏晓群常天海华南理工大学电子与信息学院广东广州510640

针对现有多通道LED均流技术的结构和控制逻辑较复杂的问题,提出一种基于谐振电容的单开关多路输出LED驱动电路。与传统的有源和无源均流方法相比,该驱动电路只使用一个半导体开关管和一个磁性元件,如电感或变压器,而且可以驱动奇数或偶... 详细信息

针对现有多通道LED均流技术的结构和控制逻辑较复杂的问题,提出一种基于谐振电容的单开关多路输出LED驱动电路。与传统的有源和无源均流方法相比,该驱动电路只使用一个半导体开关管和一个磁性元件,如电感或变压器,而且可以驱动奇数或偶数通道的LED负载,因此该电路具有体积小、成本低、性能高等优点。另外,该驱动电路只需通过控制一条支路的电流便可实现各通道的电流平衡,控制电路和控制逻辑均较为简单。对该驱动电路的均流原理进行了分析,并通过PSIM仿真软件和实验样机对分析结果进行了验证。

关键词：均流技术谐振电容单开关 LED驱动电路

Co‑packaged optics(CPO):status,challenges,and solutions

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Frontiers of Optoelectronics 2023年第1期16卷 1-40页

作者： Min Tan Jiang Xu Siyang Liu Junbo Feng Hua Zhang Chaonan Yao Shixi Chen Hangyu Guo Gengshi Han Zhanhao Wen Bao Chen Yu He Xuqiang Zheng Da Ming Yaowen Tu Qiang Fu Nan Qi Dan Li Li Geng Song Wen Fenghe Yang Huimin He Fengman Liu Haiyun Xue Yuhang Wang Ciyuan Qiu Guangcan Mi Yanbo Li tianhai chang Mingche Lai Luo Zhang Qinfen Hao Mengyuan Qin School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Department of Electronic and Computer Engineering The Hong Kong University of Science and TechnologyHong KongChina HKUST Fok Ying Tung Research Institute Guangzhou 511462China The Hong Kong University of Science and Technology(Guangzhou) Guangzhou 511462China Chongqing United Micro-Electronics Center(CUMEC) Chongqing 401332China Hisense Broadband Multimedia Technologies Co. Ltd.Qingdao 266000China Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China School of Microelectronics Xi’an Jiaotong UniversityXi’an 710049China Zhangjiang Laboratory Shanghai 201210China The State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China Huawei Technologies Co. Ltd.Shenzhen 440307China College of Computer National University of Defense TechnologyChangsha 410073China Institute of Computing Technology Chinese Academy of SciencesBeijing 100086China

Due to the rise of 5G,IoT,AI,and high-performance computing applications,datacenter trafc has grown at a compound annual growth rate of nearly 30%.Furthermore,nearly three-fourths of the datacenter trafc resides within *** conventional pluggable optics increases at a much slower rate than that of datacenter *** gap between application requirements and the capability of conventional pluggable optics keeps increasing,a trend that is *** optics(CPO)is a disruptive approach to increasing the interconnecting bandwidth density and energy efciency by dramatically shortening the electrical link length through advanced packaging and co-optimization of electronics and *** is widely regarded as a promising solution for future datacenter interconnections,and silicon platform is the most promising platform for large-scale *** international companies(e.g.,Intel,Broadcom and IBM)have heavily investigated in CPO technology,an inter-disciplinary research feld that involves photonic devices,integrated circuits design,packaging,photonic device modeling,electronic-photonic co-simulation,applications,and *** review aims to provide the readers a comprehensive overview of the state-of-the-art progress of CPO in silicon platform,identify the key challenges,and point out the potential solutions,hoping to encourage collaboration between diferent research felds to accelerate the development of CPO technology.

关键词： Co-packaged optics Silicon photonics High-performance computing Advanced packaging External laser Optical power delivery Co-simulation Standardization Transmitter Receiver

电流模式控制DC/DC转换器中的电流检测电路设计

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电子器件 2011年第2期34卷 187-189页

作者：常天海彭晓金华南理工大学电子与信息学院广州510640

应用于手机等通信电子产品电源系统的电流模式控制DC/DC转换器芯片,要求具有高性能电流检测电路。设计了一个高精度的电流检测电路,基于华润上华CSMC 0.5μm BiCMOS工艺库,利用Cadence Spectre软件进行电路仿真,经仿真得知所设计的电路... 详细信息

应用于手机等通信电子产品电源系统的电流模式控制DC/DC转换器芯片,要求具有高性能电流检测电路。设计了一个高精度的电流检测电路,基于华润上华CSMC 0.5μm BiCMOS工艺库,利用Cadence Spectre软件进行电路仿真,经仿真得知所设计的电路电流取样精度达到1 000∶1,具有很高的采样精度。该电流检测电路性能良好,已经成功应用于一款电流模式控制DC/DC转换器芯片的设计之中。

关键词： DC/DC转换器电流检测电路电流模式功率开关管

危险品仓库静电隐患的测量、评估与防护危险品工作区域中孤立导体静电隐患的防护

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安全 2005年第2期26卷 35-37页

作者：梁德亮常天海华南理工大学电信学院

阐述了危险品工作区域中孤立导体静电防护的必要性,分析了孤立导体的静电放电模式,给出了危险品工作区域中孤立导体静电隐患的一些有效防护措施,指出了预先评估的重要性。

关键词：危险品工作区域孤立导体静电隐患防护措施电晕放电火花放电刷形放电