电源内置LCD控制驱动器AMD801设计研究

介绍了一敖电源内置的4灰度色标LCD控制驱动器AMI3801的ASIC设计与实现。分析了芯片数字电路设计方案和若干低功耗技术；重点讨论了模拟电路——内置电源电路和振荡器的设计；相关模拟、数字IP核能被重用在其他LCD驱动控制芯片设计中。还描述了芯片采用的混合信号设计流程。对指导一些模数混合芯片的ASIC设计有重要意义。     

高性能移动电话音频功率放大芯片分析与设计

文章成功地将一种全差分析叠式共源共栅运算放大器结构应用于移动电话音频功率放大芯片的设计中。仿真表明，该音频功率放大芯片的电源抑制比（PSRR）在20Hz～20kHz频段始终高于60dB；尤其是在217Hz的频率上，其PSRR值达到了82dB。该设计提高了音频芯片的抗电源噪声能力，改善了通话语音质量。芯片采用华润上华（CSMC）0．6μm、3．3V／5V电源电压、2层多晶2层金属CMOS工艺制造。     

系统芯片电源管理模块的设计

超深亚微米系统芯片具有规模大，复杂度高，系统时钟频率快的特点。传统的由外部电源直接给芯片供电的方式，由于稳定性等问题往往不能保证芯片正常工作。本文提出了在系统芯片(SOC)中加入电源管理模块，用动态方法对外部电源进行管理的设计思想，达到稳定供电，低电压检测，以及保护随机存储器(RAM)内容等目的。本文给出了电源管理模块的设计方法。电路仿真结果表明当外部电源电压从3．6V降到2．7V时，电源管理模块的输出电压变化为0．2592V。     

采用LM317T芯片的电路电源设计

介绍了三端稳压器LM317T芯片的工作过程及其输出电压的计算公式。基于电路板芯片供电电源的考虑，设计了一种采用LM317T的三端稳压器的电源电路，用于给控制板芯片供电。设计电路时，详细分析了其电路设计方法，给出了此电路主要参数的计算及实验波形。最后将此供电电源电路制成印刷电路板，测取各重要测试点的电压信号，用Protel对电源供电电路进行仿真，仿真的结果与实际测试计算值相符，证明设计的电源供电电路是可靠的，具有一定的实用价值。     

国内新闻

06年我国IC设计销售收入将达265亿元；45纳米工艺再添新军联电SRAM芯片明年试生产；南通绿山8英寸项目竣工试片计划07上半年量产；成都启达科技推出一系列绿色节能AC／DC电源控制芯片；戴尔购中星微图像处理芯片     

电压检测器HT70××系列及其应用

HT70××系列集成电路是一组采用CMOS工艺制造的电源大压检测器．其包装形式有两种，一是三脚直插式封袋，二是贴片式封装．该系列芯片中包含多个型号，每种型号的芯片都用于检测一个固定的电压，整个系列中各芯片的电压检测值分布在1．5～7.0V范围内。由于采用了CMOS工艺，确保了芯片具有较低的电源消耗。虽然HT70××系列电压检测器是为了作为单片机的监控器来检测固定电厌而设计的，但是，配合少量外围元件稍加变通，还可以开发出多种用途的电路．主要性能：功耗低，植压源稳定性高；具备滞后特性；温度特性优良；体积小巧。应用范…     

新型TOPSwitch-GX系列电源的PI设计

TOPSwitch GX系列开关电源芯片内建PWM控制器和高压MOSFET，具有自动复位能力，集成过流，过热保护功能。利用该系列芯片结合PI电源设计软件平台设计了一种小功率多路输出的单端反激式开关电源。试验结果表明，该电源电路结构简单，并且运行可靠，输出电源质量高。     

片上电源将修成正果

芯片电源电压的不稳定变化，使得越来越多的整机设计人员为了电源布线的设计而大伤脑筋。由于电源电压不稳定，整机频繁发生各种故障，例如，芯片出现错误操作，PCB上因信号波形失真而引发的传输错误增多，EMI超过容许值等。     

重影消除自适应均衡芯片设计

提出了一种重影消除自适应均衡芯片设计．该芯片采用自适应算法、内置576抽头数字滤波器，可完成重影消除的所有功能。芯片高度集成，内嵌DSP控制器、存储器、同步检测器、D／A、A／D及用户编程。该芯片采用3．3V电源电压、0．35μm CMOS工艺生产制造，80-pin的QFP封装；在典型工作频率下最大功耗为1．3W。     

常忆科技推出新一代高速PM25LV SPI闪存

崇芯微电子有限公司目前推出拥有自主知识产权的高效率、多通道DC／DC转换芯片APS1004。这是一款专为数码相机而设计的电源管理芯片，也可为数码摄像机（DV）、PDA等手持设备提供电源。该芯片只需单电源输入就可产生五个不同的电压输出，分别为不同的设备提供电源。     

接入网中V5.2接口ASIC芯片设计

V5接口提供了接入网与本地交换机间的新型开放式数字接口。重点讨论了符合V5．2接口协议的ASIC芯片的实现方案。根据该方案使用硬件描述语言（Verlog HDL)和采用自顶向下（TOP－DOWN）的设计方法实现了具体电路,并使用FPGA芯片对该电路进行了物理验证。实验表明根本本方案设计的电路正确,工作稳定可靠。     

Unified security architecture and protocols using third party identity in V2V and V2I networks

VANETs have been developed to improve the safety and efficiency of transportation systems (V2V communications) and to enable various mobile services for the traveling public (V2I communications). For VANET technologies to be widely available, security issues concerning several essential requirements should be addressed. The existing security architectures and mechanisms have been studied separately in V2V and V2I networks, which results in duplicated efforts, security modules, and more complex security architectures. In this paper, we propose a unified security architecture and its corresponding security protocols that achieve essential security requirements such as authentication, conditional privacy, non‐repudiation, and confidentiality. To the best of our knowledge, this paper is the first study that deals with the security protocol in V2V as well as the handover authentication in V2I communications. Our proposal is characterized by a low‐complexity security framework, owing to the design and unification of the security architectures and modules. Furthermore, the evaluation of the proposed protocols proves them to be more secure and efficient than existing schemes. Copyright © 2010 John Wiley & Sons, Ltd.     

A new low-power pMOS poly-Si inverter for AMDs

A new low-power inverter using only p-type poly-Si thin-film transistors for the driving circuits of active matrix liquid crystal displays and active matrix organic light-emitting diodes is proposed and fabricated. The proposed pMOS inverter using capacitive coupling and bootstrapping successfully eliminated the troublesome through current and exhibited a wide output swing from V/sub DD/ to V/sub SS/ without additional signals.     

三维非平稳V2V 信道建模及统计特性研究

针对车-车(Vehicle-to-Vehicle, V2V)通信场景复杂多样且无线信号呈现三维传播的特点,提出了一种双簇散射体架构的三维非平稳随机几何信道模型(Geometry-Based Stochastic Model, GBSM)。该模型考虑了直射路径、单跳路径、多跳路径和虚拟等效链路,可适用于车联网通信环境各种信号传播场景。在此基础上,针对该模型理论推导了三维场景下信道的统计特性,包括归一化空时相关性、多普勒功率谱(DPSD)、电平通过率(LCR)和平均衰落持续时间(AFD)的理论表达式。仿真结果表明,推导的理论结果和数值仿真及实测结果都比较吻合,从而验证了理论推导的正确性及信道模型的有效性。该模型可用于车联网通信场景下无线通信系统的方案设计和性能分析。     

5 V compatibility with 3.3 V-only CMOS ASICs

A 3.3 V-only CMOS I/O buffer is proposed that interfaces with 5 V CMOS and TTL devices. This new buffer eliminates the 5 V power supply bus on the application specific integrated circuit (ASIC) chip while greatly improving the performance and reliability of the I/O buffer. In addition, the cost of packaging these ASICs is reduced due to removing the need of supporting a 5 V power plane on the package. The interfacing issues and the characteristics of the proposed I/O buffer are examined in detail.     

A 3 V GSM codec

Designed to satisfy the data conversion requirements of the Pan-European (GSM) cellular radio system, the chip is part of a four chip-set total GSM solution comprising the codec, the DSP, the digital ASIC, and the micro-controller. Fabricated in a 0.8 μm double-poly, double-metal CMOS process, the integrated circuit combines a voiceband codec with a baseband codec plus auxiliary converters in an 80-pin TQFP package while running off a single 3 V power supply     

面向车联网通信的OTFS信号检测算法综述

车联网(Vehicle to Everything, V2X)通信被认为是未来无线通信网络最重要的应用之一。然而,车辆在高速移动时引起的高多普勒频移会严重恶化V2X通信链路的性能。正交时频空(Orthogonal Time Frequency Space, OTFS)调制技术可以将时间和频率选择性信道转换为时延-多普勒(Delay-Doppler, DD)域的非选择性信道,从而显著提高无线通信系统在高移动性场景下的性能,在V2X通信中具有重要的应用价值。但OTFS调制技术极大地增加了系统接收端的复杂度,研究低复杂度信号检测算法成为了新一代无线通信系统采用OTFS调制的关键问题之一。为此,综述了面向车联网V2X通信的OTFS信号检测算法。首先介绍了OTFS系统模型,然后概述了现有的低复杂度OTFS信号检测算法,并将其分为线性检测算法、消息传递(Message Passing, MP)检测算法及其改进算法、基于神经网络的检测算法3类,最后探讨了V2X通信中OTFS信号检测目前所面临的技术挑战与未来的发展趋势。     

Explanation for the dark I–V curve of III–V concentrator solar cells

The measurement of the dark I–V curve is one of the most straightforward methods for characterizing solar cells. Consequently, an accurate knowledge of its meaning is of high relevance for the comprehension and technological feedback of these devices. In this paper, an explanation of the dark I–V curve for concentrator III–V solar cells is presented using a 3D (three‐dimensional) model in order to provide a proper data fit that provides meaningful physical parameters that are also compatible and coherent with a data fit from illumination curves. The influence on the dark I–V curve of the most significant series resistance components of concentrator solar cells is also analysed concluding that only the vertical component as well as the front contact‐specific resistance can be assessable by means of this characterization method while both emitter and metal sheet resistances cannot be detected. For comparison purposes, the same experimental data have been fitted by means of a traditional two‐diode model showing that, although an accurate dark I–V curve fitting can be achieved, the extracted parameters are unable to reproduce illumination data since lumped models assume the same ohmic losses distribution for both dark and illumination conditions. Copyright © 2007 John Wiley & Sons, Ltd.     

NGN网络测试仪中V5UA及V5.2协议解码的实现

简要介绍了V5UA和V5.2的基本概念,功能,以及它们在NGN中的组网应用方式,并在深入分析V5UA和V5.2消息结构的基础上,实现NGN网络测试仪的VSUA协议的解码、上层协议数据提取、以及V5.2的解码方法.     

浅析V槽上金

无铅时代的到来,板材也正在逐步向无铅体系板材过渡,随之也带来一些负面影响;有铅板材开V槽后进行沉镍金,没有出现V槽上金;无铅板材开V槽后进行沉镍佥,断续出现V槽上金;从板材、刀具、沉镍金工艺三个方面实践论述V槽上金的原因分析及解决办法。