手机用TFT-LCD驱动控制芯片电源模块设计

电源模块是TFT-LCD驱动控制芯片内置模拟电路的一个重要组成部分,其性能直接影响着芯片的功耗以及彩屏手机的显示画质。文章从TFT-LCD的驱动原理出发,提出了一种低功耗、易调节的电源模块设计思想,所产生的电压值可实现编程控制。用Hspice对采用0.25μmCMOS工艺设计的电路进行仿真表明,系统在启动200ms后能够生成稳定、正确的驱动电源电压,其静态功耗小于2mW。     

带有快速启动的高精密低噪声CMOS带隙基准

提出了一种新颖的带有快速启动的高精密、低噪声CMOS带隙基准电压源。RC滤波电路的引入降低了基准在高频处的噪声、增加了输出基准的电源抑制比,快速启动电路的引入改善了RC滤波电路限制基准启动速度的问题,并且为了使基准在电源上电的过程中能够正常的工作而增加了软启动电路。采用UMC 0.6μm 2P2M标准CMOS工艺进行设计和仿真,HSpice模拟表明基准具有较高的精度和较低的噪声,电源抑制比PSRR约为-80 dB。此外,由于快速启动电路的存在使得基准的建立时间从20 ms降至70μs。     

TFT-LCD驱动芯片内置电源电路IP核设计

设计了一种采用0.25μm CMOS低压/中压/高压混合电压工艺的TFT-LCD驱动芯片内置电源电路IP核.该IP模块包括低压降线性稳压电路、电荷泵升压/反压电路、VCOM驱动电路和VGOFF驱动电路等,能够提供驱动芯片的系统工作电压和TFT-LCD的驱动电压.所产生的电压值可实现编程控制,具有启动时间快、工作稳定和较低的温度系数等特点.仿真与测试结果表明,在上电200ms后能够生成稳定、正确的输出电压.电源电路模块的总静态功耗小于2mW.     

TFT-LCD驱动芯片内置电源电路IP核设计

设计了一种采用0.25μm CMOS低压/中压/高压混合电压工艺的TFT-LCD驱动芯片内置电源电路IP核.该IP模块包括低压降线性稳压电路、电荷泵升压/反压电路、VCOM驱动电路和VGOFF驱动电路等,能够提供驱动芯片的系统工作电压和TFT-LCD的驱动电压.所产生的电压值可实现编程控制,具有启动时间快、工作稳定和较低的温度系数等特点.仿真与测试结果表明,在上电200ms后能够生成稳定、正确的输出电压.电源电路模块的总静态功耗小于2mW.     

一种低功耗快速起振晶体振荡器

基于CSMC0.5μm40VBCD工艺,设计了一种32.768kHz的晶体振荡器电路。通过Matlab分析振荡条件,以指导电路设计;通过自动增益控制环路,使振荡器的起振时间低至206ms;由微电流的跨导放大器实现了集成电路中的大电阻,用在反馈电阻和滤波器中;环路稳定后,振荡器核心电路的电流仅为195nA,同时,该电路还提供占空比为46%的方波输出。     

适用于无源射频标签的低功耗单栅非挥发性存储器

针对低成本、低功耗无源射频电子标签,采用SMIC 0.18μm标准CMOS工艺设计实现了单栅、576bit的非挥发性存储器.存储器单元基于双向Fowler-Nordheim隧穿效应原理并采用普通的pMOS晶体管实现;编程/擦写时间为10ms/16bit.芯片实现块编程和擦写功能,通过提出一种新型的敏感放大器而实现了读功耗的优化.在电源电压为1.2V,数据率为640kHz时,读操作平均消耗电流约为0.8μA.     

适用于无源射频标签的低功耗单栅非挥发性存储器

针对低成本、低功耗无源射频电子标签,采用SMIC 0.18μm标准CMOS工艺设计实现了单栅、576bit的非挥发性存储器.存储器单元基于双向Fowler-Nordheim隧穿效应原理并采用普通的pMOS晶体管实现;编程/擦写时间为10ms/16bit.芯片实现块编程和擦写功能,通过提出一种新型的敏感放大器而实现了读功耗的优化.在电源电压为1.2V,数据率为640kHz时,读操作平均消耗电流约为0.8μA.     

高动态范围多功能快照式红外读出电路设计

设计并验证了一款高动态范围、多种可选功能的32×32红外读出电路。电路在30μm×30μm像元面积内集成了CTIA积分器、采保电路、缓冲器、反饱和功能等,实现了快照式读出。通过积分电容可选,积分时间可从1μs调至33ms(以30Hz帧频计算)的工作方式,有效地扩大系统动态范围,使其具备高低背景工作能力。基于格雷码原理设计的控制电路,实现了动态窗口读出,图像翻转,1、2、4路输出等可选功能。所设计的读出电路采用华虹NEC0.35μmCMOS工艺成功流片,验证了设计的正确性。测试结果表明,电路采用4路输出时,帧频能达到16kFrames/sec,可应用于红外制导领域。     

适用于无源RFID标签芯片的SPNVM优化设计

稳定的非挥发性存储器(Non-volatile memory,NVM)是射频识别标签系统中的重要组成部分,作为系统的信息承载体,用于存储用户或产品的基本信息。NVM的性能和造价是约束其发展的主要因素,为了改善非挥发性存储器的性能和降低其成本,文中基于传统的非挥发性存储器EEPROM,采用UMC 0.18μm标准CMOS工艺,优化设计了一个存储容量为256位高性能低成本的单栅非挥发性存储器,从工作电压、效率、速度和功耗的角度,对存储单元进行了隔离保护处理,改进了电荷泵的升压模块和稳压模块,采用电压检测型灵敏放大器。电源电压1.8V,编程电流为42μA,读电流为2μA,编程时间为5ms/bit,读速率为2Mb/s。     

一种适用于反熔丝FPGA的高效电荷泵电路

基于Dickson电荷泵结构,提出了一种适用于反熔丝现场可编程门阵列(FPGA)的新型高效电荷泵电路,实现了电荷泵的快速启动。通过采用时钟信号升压电路,减少了电荷泵级数,并减小了电路总体面积和功耗。仿真结果显示,在2.5 V的工作电压和整体电路全负载的条件下,整体电路的启动时间约为20μs,可稳定输出电压5.46 V,工作电流约为618μA。采用0.18μm CMOS工艺流片并对其进行编程和测试,结果显示FPGA电路编程成功,功能正确,与仿真结果一致,表明了此电荷泵结构的可行性和实用性。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first