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现场可编程门阵列(FPGA)器件广泛用于数字信号处理领域,而使用VHDL或VerilogHDL语言进行设计比较复杂。提出一种采用FDATOOL工具和DSP Builder实现FIR滤波器的设计方案,按照MATLAB/Simulink/DSP Builder/QuartusII设计流程,使用FDATOOL工具可以实时调整滤波器的参数,采用DSP Builder设计了一个16阶FIR低通滤波器模型,并完成了仿真与验证,将模型转换生成VHDL代码,实现了基于FPGA的数字滤波器的设计。结果表明,该方法简单易行,易修改与移植,可满足设计要求,它验证了采用DSP Builder实现数字滤波器设计的独特优势。 相似文献
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针对使用硬件描述语言进行设计存在的问题,提出一种基于FPGA并采用DSP Buiider作为设计工具的数字信号处理器设计方法.并按照Matlab/Simulink/DSP Builder/Quartus Ⅱ设计流程,设计了一个12阶FIR低通数字滤波器,通过Quartus时序仿真及嵌入式逻辑分析仪SignalTap Ⅱ硬件测试对设计进行了验证.结果表明,所设计的FIR滤波器功能正确,性能良好. 相似文献
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现场可编程门阵列(FPGA)器件广泛用于数字信号处理领域,而使用VHDL或VeriiogHDL语言进行设计的难度较大.提出一种采用DSP Builder实现FIR滤波器的设计方案,按照Matlab/Simulink/DSP Builder/Modelsim/Quartus Ⅱ的设计流程,设计一个16阶的FIR低通滤波器,并完成了软硬件的仿真与验证.结果表明,该方法简单易行,可满足设计要求,它验证了采用DSP Builder实现滤波器设计的独特优势. 相似文献
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基于DSP Builder的14阶FIR滤波器的设计 总被引:1,自引:0,他引:1
数字滤波器在数字信号处理的各种应用中有着广泛的应用。数字滤波器既可以是有限长单脉冲响应(FIR)滤波器也可以是无限长单脉冲响应(IIR)滤波器。通过两者特点的比较,按照Matlab/Simulink/DSP Builder/QuartusⅡ的流程,设计了一个14阶的FIR滤波器,并进行了相关仿真,提出了一种在实际硬件中测试的方法,从而验证了采用DSP Builder实现滤波器设计的硬件化的独特优势。 相似文献
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本文是利用Altera提供的DSP Builder开发工具从Simulink模型自动生成VHDL代码的一种FPGA设计方法来实现一个16阶FIR数字低通滤波器,设计出的滤波器用于线性调制的相干解调中。通过对设计的电路进行验证和仿真,结果表明电路工作正确可靠,能满足设计要求。 相似文献
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《电子技术与软件工程》2017,(12)
介绍了DSP滤波器的工作原理,讨论了DSP的硬件设计方法,并使用MATLAB进行仿真处理。介绍了在FIR与IIR之间的异同之处,简要较介绍了一般数字滤波器的设计步骤,阐述了在DSP设计滤波器时软件设计与其他工程中软件设计的相异之处。并介绍了一般数字滤波器中的性能测试程序。对基于FPGA(Fieldprogrammable Gate Array)的DSP设计与传统DSP设计方法进行详细的比较分析。 相似文献
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Michael Reilly 《半导体技术》2004,29(12)
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. 相似文献
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Thomas M.Trexler 《半导体技术》2004,29(5)
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. 相似文献
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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. 相似文献
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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. 相似文献
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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. 相似文献
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GU Min-fen LIANG Zhong-cheng WANG Ren-zhou DONG Xiang-mei ZHANG Pei-ming CHEN Jia-bi 《光电子快报》2008,4(2):150-152
Waveguide multilayer optical card (WMOC) is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling & processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic (VB) language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor. 相似文献
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Qi-jiang Ran Pei-de Han Yu-jun Quan Li-peng Gao Fan-ping Zeng Chun-hua Zhao 《光电子快报》2008,4(4):239-242
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. 相似文献
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The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well. 相似文献
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Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems. 相似文献
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An insert layer structure organic electroluminescent device(OLED) based on a new luminescent material (Zn(salen)) is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn(salen)/Liq/LiF/A1/CuPc/NPD/Zn(salen)/Liq/LiF/A1. Effective insert electrode layers comprising LiF(1nm)/Al(5 nm) are used as a single semitransparent mirror, and bilayer cathode LiF(1 nm)/A1(100 nm) is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect. 相似文献