低功耗智能电能表设计

以超低功耗单片机MSP430F149为控制器,在高精度电能计量芯片ATT7022B基础上,设计了一款三相多功能电能表。实际使用验证该电能表功耗低,操作方便,具有极大的推广价值。     

温箱温度控制设计

针对温箱控制过程中出现的精度低,稳定性差等问题,设计了一种基于MSP430F149单片机的高精度温箱温度控制系统。系统采用铂电阻温度传感器及12位A/D转换器实现了温箱温度精确测量,并利用低功耗MSP430F149单片机及加热和降温系统实现了对温箱温度的精确控制。通过不同温度下测量实验,表明温箱温度控制系统性能稳定可靠。从而在-50～150℃温度范围内,温箱控制精度可以达到±0.5℃。     

基于MSP430F149的便携式仪器的低功耗设计

本文介绍了一种用MSP430F149单片机设计的便携式系统，通过分析电源芯片的性能及单片机、外围器件的功耗特点，针对如何实现电池供电的便携式系统的超低功耗，提出了具体的硬件和软件解决方法。     

一种低功耗多功能数字温度计设计

介绍了一种低功耗多功能数字温度计的设计方法。采用TI公司的低功耗微控制器MSP430F149作为主控芯片,基于铂电阻测温原理,采用热敏电阻PT100传感器实现温度数据采集,并结合LM358芯片和LCD12864分别实现信号放大和数显功能。给出了各主要部分的硬件电路设计原理图,描述了各个功能的实现方法,并采用多种方法以降低系统的功耗。从系统仿真与硬件调试表明,设计可以实现基于MSP430单片机的较高精度的低功耗数字温度显示与报警功能。     

基于MSP430的动感单车测速系统设计

主要论述了MSP430F149低功耗单片机TIMER A捕获方式的工作原理、霍尔传感器的工作方式,利用MSP430F149单片机捕获方式和霍尔传感器A44E设计了动感单车的速度测量系统,同时给出了较为精确的计算方法以及程序设计过程。     

基于MSP430F149单片机的低功耗电子血压计设计

介绍一种基于MSP430系列单片机的低功耗电子血压计。该系统以MSP430F149单片机为核心,由数据采集模块、气路控制模块、电源模块、存储模块和显示模块等模块电路组成。通过US9116-006-N压力传感器实时采集压力信号,由MSP430F149对采集到的信号进行A/D转换和分析处理得到血压值,同时将结果进行显示和存储。该系统具有低功耗和携带方便等优点。     

液晶显示模块和MSP430单片机在显示终端上的应用

介绍了一种显示终端的设计方法。并根据WGMl2864M点阵液晶显示模块的特点．结合MSP430F149超低功耗单片机．论述了点阵液晶显示的编程方法．给出了WGMl2864M与MSP430F149的硬件接口电路和显示程序流程图。     

基于MSP430F149的光伏MPPT控制器的设计

本文介绍了一种采用超低功耗单片机MSP430F149控制系统来实现太阳能光伏电池最大功率点跟踪的精简设计,在这个设计中提出来采用变步长扰动分析法来实现MPPT的控制,并分析和比较了Buck和Boost电路的优缺点,然后采用Boost电路结合MSP430F149单片机完成了MPPT控制器的设计。最后,采取模拟实验的方法对控制器的功能进行了验证。结果表明,该设计不但电路设计简单,软硬件结合,控制方法灵活,而且能够有效的完成最大功率跟踪的目的。     

TMP275在手持式实时测温仪中的应用

设计一种基于TMP275的手持实时测温仪,采用TI公司的低功耗单片机MSP430F149作为主控芯片,该系统采用I^2C总线协议数字温度传感器TMP275对现场温度进行采集,通过低功耗液晶模块进行实时温度显示,该系统具有采集数据准确、抗干扰能力强、功耗低的特点,非常适合于对现场环境温度进行测量与采集。     

基于MSP430的智能仪表的LCD驱动设计

介绍了基于MSP430单片机的智能仪表的微功耗中英文人机界面的设计思路和方法,并给出了重要的程序。通过MSP430F147与字符型LCD(液晶显示器)接口电路,实现了中文人机界面的设计方案。详细介绍了以MSP430F147为核心进行液晶显示驱动的实现方法,给出了软硬件设计的相关内容。同时,对MSP430F147超低功耗控制的关键问题进行论述,低功耗特性的基本要求贯穿于中文人机界面的设计始终。     

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.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

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