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文章介绍了一款分辨率为160×120的有机发光二极管微型显示系统,本设计采用电流驱动方案实现微型显示系统需要的微量级电流需求,同时采用电流型数模转换器实现16级灰度显示。采用中芯国际的CMOS 0.35μm工艺实现了结构紧凑、制造成本低廉的一款实用型微型显示器。 相似文献
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介绍了合成全息图拍摄过程中图像的滤波处理过程,并分析了利用透镜对图像信息进行会聚时光场的不均匀性问题。为改善会聚光场的均匀性,通常需在透镜前设置弱散射片,从理论上分析了相位散射片改善光场均匀性的原理,基于该原理利用傅里叶迭代算法(G-S算法)对相位散射片的相位分布进行了设计,并将所设计的相位片应用于实际图像进行了仿真分析。结果表明,通过精确设计相位片的相位分布能极大地改善光场的均匀性,且能在一定范围调整光斑尺寸的大小。最后针对相位片实际制作中相位的量化问题分析了量化误差的影响,仿真结果表明,当量化阶数达到8阶时量化误差的影响可以忽略。 相似文献
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描述了一种既可用于背板传输也可用于光纤通信的高速串行收发器前端均衡器的设计。为适应光信号在传播中的色散效应,使用前馈均衡器(FFE)加判决反馈均衡器(DFE)的组合,取代了背板通信中常用的连续时间线性均衡器(CTLE)和DFE的组合。设计使用3 pre-tap、3 post-tap和1个main tap的抽头组合方式,兼顾pre-cursor和post-cursor的信号失真,有效补偿范围为15 dB。补偿系数采用完全自适应算法调整,对FFE采用模拟MSE算法调整,DFE引擎采用1/16速率数字sign-sign最小均方差(LMS)算法实现。芯片使用UMC 28 nm工艺流片,输入信号频率为10 Gbit/s。 相似文献
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《固体电子学研究与进展》2017,(6)
利用0.35μm SiGe BICMOS工艺,设计了一种接收均衡和发送预加重电路。均衡部分采用2级级联的连续时间线性均衡器,补偿由于传输通道损耗带入的信号高频分量衰减。预加重部分采用了一种新型的开关电容式,电流注入结构进行比特位预加重,对高频信号进行预补偿,以降低由于信道衰减造成的ISI。测试结果显示该电路速率范围可达DC~6.25Gbps,均衡器最大可补偿-14dB@3.125GHz的信号衰减,驱动器输出预加重比例为6dB。 相似文献
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球基面反射型彩虹全息的记录参数与平基面相比有所区别,通过计算位相函数得出球基面反射衍射像的物像关系,以此为基础给出球基面彩虹全息的光路参数设计方法,最后进行了实验验证。 相似文献
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Zhizhong Yuan Anopchenko A. Daldosso N. Guider R. Navarro-Urrios D. Pitanti A. Spano R. Pavesi L. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》2009,97(7):1250-1268
Silicon nanocrystals (Si-nc) is an enabling material for silicon photonics, which is no longer an emerging field of research but an available technology with the first commercial products available on the market. In this paper, properties and applications of Si-nc in silicon photonics are reviewed. After a brief history of silicon photonics, the limitations of silicon as a light emitter are discussed and the strategies to overcome them are briefly treated, with particular attention to the recent achievements. Emphasis is given to the visible optical gain properties of Si-nc and to its sensitization effect on Er ions to achieve infrared light amplification. The state of the art of Si-nc applied in a few photonic components is reviewed and discussed. The possibility to exploit Si-nc for solar cells is also presented. In addition, nonlinear optical effects, which enable fast all-optical switches, are described. 相似文献
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Letian Wang Matthew Eliceiri Yang Deng Yoonsoo Rho Wan Shou Heng Pan Jie Yao Costas P. Grigoropoulos 《Advanced functional materials》2020,30(17)
Both amorphous and crystalline silicon are ubiquitous materials for electronics, photonics, and microelectromechanical systems. On‐demand control of Si crystallinity is crucial for device manufacturing and to overcome the limitations of current phase‐change materials (PCM) in active photonics. Fast reversible phase transformation in silicon, however, has never been accomplished due to the notorious challenge of amorphization. It is demonstrated that nanostructured Si can function as a PCM, since it can be reversibly crystallized and amorphized under nanosecond laser irradiation with different pulse energies. Reflection probing on a single nanodisk's phase transformations confirms the distinct mechanisms for crystallization and amorphization. The experimental results show that the relaxation time of undercooled silicon at 950 K is 10 ns. The phase change provides a 20% nonvolatile reflectivity modulation within 100 ns and can be repeated over 400 times. It is shown that such transformations are free of deformation upon solidification. Based on the switchable photonic properties in the visible spectrum, proof‐of‐concept experiments of dielectric color displays and dynamic wavefront control are shown. Therefore, nanostructured silicon is proposed as a chemically stable, deformation free, and complementary metal–oxide‐semiconductor compatible (CMOS) PCM for active photonics at visible wavelengths. 相似文献
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建立了基于注入式PIN结构的亚微米硅基波导光学相位调制器模型,对该调制器模型的光学特性和电学特性进行了理论分析和仿真,确定了器件的单偏振单模条件。在此条件下,重点分析并讨论了在不同结构参数与掺杂条件下器件调制效率的变化特性。结果表明,通过减小外脊高、增大掺杂浓度、减小波导区到掺杂区的距离、增大掺杂深度等均可有效提高器件的调制效率。在此基础上确定了器件的最优结构参数,结果表明其相位调制效率可达到19rad·V-1·mm-1,3dB带宽大于1GHz,同时该调制器还具有结构紧凑、工作电压低、易于集成的优点。 相似文献
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介绍太阳电池的原理及烧结工艺,通过研究烧结工艺与前道工序的关联因素,结合烧结工艺对温度曲线的要求,确定烧结炉的内部结构及温区分布,最后利用热工理论计算,得出炉体功率分布,找到最佳的烧结工艺状态,进而确定炉体的设计关键参数。 相似文献