螺距结构变形铁电液晶显示器

通过对螺距结构变形铁电液晶的工作原理，工作特性分析，全面介绍了螺距结构变形铁电液晶显示器的动态特性－驱动电压，响应速度，对比度，透过率以及储存动性，同时介绍了它的用途。     

彩色铁电液晶显示器

彩色滤波膜、透明导电膜，表面稳定的铁电液晶取向膜等构成了彩色铁电液晶显示器的主要材料。文章论述了彩色铁电液晶显示器的制造和性能，制出的铁电液晶显示器，其对比度达８４：１，上升时间为１１０μｓ，下降时间为７６μｓ。     

表面稳定化型铁电液晶显示器件

通过对表面稳定化型铁电液晶显示器（ＳＳＦＬＣＤ）的工作原理、工作特性分析，全面介绍了表面稳定化型电液晶显示器的开关过程、工作方式、取向控制和驱动方法，同时也介绍了它的用途。     

螺旋形变型铁电液晶显示器

本文介绍了一种基于螺旋形变铁电液晶效应的新型视频显示器，用二极管有源矩阵驱动。显示器视角大，可工作于视频速率。为了防止残像，螺旋形变型铁电液晶显示器工作于对称模式。     

透反液晶显示器

透反液晶显示器兼有透射式和反射式显示器的优点,功耗低,环境光适应性强,是目前比较活跃的平板显示技术研究方向,文章介绍了金属开孔半透层透反液晶显示器、双盒厚ECB透反液晶显示器、采用图像增强反射器的透反液晶显示器、双伽玛驱动方法透反液晶显示器、双液晶模式透反液晶显示器和空间混色与时间混色结合的透反液晶显示器等,介绍了它们各自的优点和缺点。目前色彩平衡、图像亮度、视角、生产成本等是透反液晶显示器研究需要解决的主要问题。     

VGA—STN—LCD的程序设计

本文介绍了在ＶＧＡ－ＳＴＮ液晶显示器显示程序设计方面所做的一些工作，研究了ＳＴＮ液晶显示器的显示特性，介绍了几种通用的数字半色调显示方法，并在此基础上针对我们研制的单色和多色ＳＴＮ液晶显示器优化设计了显示驱动程序。     

铁电液晶显示器单像素电光响应特性测量系统

采用自行设计的测量系统对自制的１２８ ×１２８ 铁电液晶显示器不同区域像素的电光响应特性进行了测量，这些测量结果对铁电液晶器件的制作有一定的参考价值。     

液晶显示器的清洗技术(三)

文章首先对液晶显示器的发展历程进行简要回顾，并对各种液晶显示器的工作原理、结构特点作了介绍，其中对薄膜晶体管液晶显示器(TFT-LCD)的基本结构和生产工艺流程做了重点介绍，文章还对液晶显示器的制备过程中采用的洗净技术以及目前国外技术发展的新动向做了较详细的介绍。     

铁电及反铁电液晶显示

介绍铁电液晶及反铁电液晶显示的特点，对铁电液晶显示器中，分子排列不易均匀和容易受振动而破坏的难题，提出了解决办法，指出铁电液晶显示器和反铁电液晶显示器具有很好的发展前景。     

相变型液晶投影显示器

利用向列-胆甾相混合液晶的双稳态相变特性,日本富士通公司现已研制成高清晰度电写入液晶投影显示器,特別适宜于用在专业会议、课堂教学和发布通告中。由于不用偏振片,具有屏幕信息量大、图象亮度高的优点。本文描述了这种投影显示器的工作原理、制造方法和选址方案,最后还给出了其技术规范。     

Mach-Zehnder Type Annealed Proton Exchange Waveguide and Coplanar Waveguide Modulation Electrode LiNbO3 Intensity Modulator

The characteristics of a conventional LiNbO3 intensity modulator made up of a Mach-Zehnder （MZ） type annealed proton exchange（APE） waveguide and coplanar waveguide（CPW） modulation electrode are presented. The APE waveguide characteristics and their relations with process parameters are analyzed. At the same time, the electrical characteristics of modulation electrode, such as modulation voltage, microwave effective index associated with modulation bandwidth, characteristics impedance, are also investigated in detail.     

NVM characteristics of single-MOSFET cells using nitride spacers with gate-to-drain NOI

This work presents the characteristics of a two-bit-per-cell charge-trapping nonvolatile memory (NVM) device by using gate-to-drain nonoverlapped implanted (NOI) n-MOSFETs. Hot carriers are generated in NOI devices and injected into the silicon nitride spacers. The characteristics of this potential single-transistor NVM cell, including two-bit operation, programming and erasing characteristics, are investigated. Their stability and reliability characteristics such as retention, disturbance and cycling are also evaluated.     

多波段多极化海杂波特性的实验研究

长期以来,海杂波特性研究一直是雷达和微波遥感界普遍关心的问题。本文讨论基于矢量网络分析仪组建的波谱计对海杂波特性所进行的多波段(S,C,X,Ku)多极化测量,包括测量系统、实验描述和数据处理方法,通过数据分析得到不同海态下杂波特性(散射系数、多普勒谱等)随频率、极化和人射角(含小擦地角)的变化关系并给出一些典型结果。     

Characteristics of 10-Gb/s Electroabsorption Modulator Integrated Distributed Feedback Lasers for Long-Haul Optical Transmission Systems

In this study, we review the characteristics of 10-Gb/s electroabsorption modulator integrated (EAMI) distributed feedback (DFB) lasers for long-haul optical transmission systems. The recent progress and issue of extinction ratio, chirp, and frequency response are described, which are important parameters to improve transmission performance. Except for the extinction ratio, frequency response and chirp characteristics are discussed further. The frequency response of packaged EAMI-DFB lasers has been improved using the novel impedance matching technique. The large signal chirp characteristics are calculated with varying bias voltage, facet reflectance, grating phase, and a coupling coefficient (κL) to predict the measured chirp characteristics. Finally, transmission performance (BER, eye margin, and eye opening penalty) is measured and estimated using the calculated chirp characteristics.     

Carrier-based PWM-VSI overmodulation strategies: analysis,comparison, and design

In this paper, the overmodulation region voltage-gain characteristics and waveform quality of carrier-based pulsewidth-modulated (PWM) methods are investigated. Through detailed analytical study, voltage-gain characteristics are extracted independent of carrier frequency. The influence of blanking time and minimum pulsewidth (MPW) control on the inverter gain characteristics are studied and shown to be significant. A comparative evaluation of the modulator characteristics reveals the advantageous high-modulation-range characteristics of discontinuous PWM methods and, in particular, the superior overmodulation performance of a discontinuous PWM method. The modulation methods under consideration are tested on a PWM voltage-source inverter (VSI)-fed induction motor drive in the laboratory, and the theoretical results are verified by experiments. Also, a gain linearization technique is presented and experimentally verified. The results of this study are useful in the design, performance prediction and development of high-performance overmodulation strategies for PWM-VSI drives     

基于单电子晶体管细胞神经网络的实现方法

基于单电子晶体管(SET)的I-V特性和CNN细胞单元的硬件结构原理，给出了三种基于SET的CNN硬件电路具体实现方法：一是基于SET的库仑振荡特性和CMOS数字电路的设计思想方法；二是根据细胞单元的等效结构分块实现方法；三是基于SET阵列的传输特性实现CNN方法，并重点阐述了后两种SET的CNN实现方法，分析了它们的优缺点。     

Experimental microwave study of metal-to-metal point-contact diodes

New characteristics obtained with metal-insulator-metal (MIM) diodes are studied. These new characteristics are interpreted according to the tunneling process, and they are compared with the characteristics one can obtain with the IN23 diodes.     

Electrical Characteristics of PEDOT:PSS Organic Contacts to HgCdTe

The electrical characteristics of organic (3,4-polyethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) contacts to HgCdTe are studied as a potential alternative to metal/HgCdTe contacts. The use of organic PEDOT:PSS contacts offers the potential for an improved contact technology for HgCdTe IR detector arrays. In this work, PEDOT:PSS contacts are deposited on n-type and p-type HgCdTe epilayers by spin coating and patterned using a metal mask. Current-voltage (I-V) characteristics are measured on these contacts, showing nearly ohmic behavior. The temperature dependence of I-V characteristics (T = 40–300 K) shows increased resistance for decreasing temperature, consistent with the temperature dependence of HgCdTe resistivity, suggesting that the I-V characteristics are primarily dominated by the HgCdTe material.     

Analysis of the open-ended image NRD guide using FDTD

Simulation is an indispensable means of designing antennas, especially when the evaluation of the antenna characteristics using theoretical analysis is complex or not very accurate. This work proposes an open-ended image nonradiative dielectric (NRD) guide antenna and presents its characteristics obtained using the finite-difference time-domain (FDTD) method. The key features of the FDTD implementation are discussed, particularly the simple and convenient approximate three dimensional modeling of the coaxial feed cable and the excitation probe that were used. The characteristics of the antenna that were determined are the return loss and absolute gain frequency characteristics and the E- and H-plane radiation patterns. Experimental results are used to verify the characteristics obtained using FDTD and are found to be in good agreement.     

Design of zero-phase recursive 2-D variable filters with quadrantal symmetries

The digital filters with adjustable frequency-domain characteristics are called variable filters. Variable filters are useful in the applications where the filter characteristics are needed to be changeable during the course of signal processing. In such cases, if the existing traditional constant filter design techniques are applied to the design of new filters to satisfy the new desired characteristics when necessary, it will take a huge amount of design time. So it is desirable to have an efficient method which can fast obtain the new desired frequency-domain characteristics. Generally speaking, the frequency-domain characteristics of variable filters are determined by a set of spectral parameters such as cutoff frequency, transition bandwidth and passband width. Therefore, the characteristics of variable filters are the multi-dimensional (M-D) functions of such spectral parameters. This paper proposes an efficient technique which simplifies the difficult problem of designing a 2-D variable filter with quadrantally symmetric magnitude characteristics as the simple one that only needs the normal one-dimensional (1-D) constant digital filter designs and 1-D polynomial approximations. In applying such 2-D variable filters, only varying the part of 1-D polynomials can easily obtain new desired frequency-domain characteristics.