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Physics-Based

  • XAPP328-使用CPLD設(shè)計(jì)MP3播放器

      MP3 portable players are the trend in music-listening technology. These players do not includeany mechanical movements, thereby making them ideal for listening to music during any type ofactivity. MP3 is a digital compression technique based on MPEG Layer 3 which stores music ina lot less space than current CD technology. Software is readily available to create MP3 filesfrom an existing CD, and the user can then download these files into a portable MP3 player tobe enjoyed in almost any environment.

    標(biāo)簽: XAPP CPLD 328 MP3

    上傳時(shí)間: 2013-11-23

    上傳用戶:nanxia

  • WP369可擴(kuò)展式處理平臺(tái)-各種嵌入式系統(tǒng)的理想解決方案

    WP369可擴(kuò)展式處理平臺(tái)-各種嵌入式系統(tǒng)的理想解決方案 :Delivering unrivaled levels of system performance,flexibility, scalability, and integration to developers,Xilinx's architecture for a new Extensible Processing Platform is optimized for system power, cost, and size. Based on ARM's dual-core Cortex™-A9 MPCore processors and Xilinx’s 28 nm programmable logic,the Extensible Processing Platform takes a processor-centric approach by defining a comprehensive processor system implemented with standard design methods. This approach provides Software Developers a familiar programming environment within an optimized, full featured,powerful, yet low-cost, low-power processing platform.

    標(biāo)簽: 369 WP 擴(kuò)展式 處理平臺(tái)

    上傳時(shí)間: 2013-10-18

    上傳用戶:cursor

  • xilinx Zynq-7000 EPP產(chǎn)品簡介

    The Xilinx Zynq-7000 Extensible Processing Platform (EPP) redefines the possibilities for embedded systems, giving system and software architects and developers a flexible platform to launch their new solutions and traditional ASIC and ASSP users an alternative that aligns with today’s programmable imperative. The new class of product elegantly combines an industrystandard ARMprocessor-based system with Xilinx 28nm programmable logic—in a single device. The processor boots first, prior to configuration of the programmable logic. This, along with a streamlined workflow, saves time and effort and lets software developers and hardware designers start development simultaneously. 

    標(biāo)簽: xilinx Zynq 7000 EPP

    上傳時(shí)間: 2013-10-09

    上傳用戶:evil

  • PLD對(duì)FPGA數(shù)據(jù)加密

    SRAM-based FPGAs are non-volatile devices. Upon powerup, They are required to be programmed from an external source. This procedure allows anyone to easily monitor the bit-stream, and clone the device. The problem then becomes how can you effectively protect your intellectual property from others in an architecture where the part is externally programmed?

    標(biāo)簽: FPGA PLD 數(shù)據(jù)加密

    上傳時(shí)間: 2013-10-20

    上傳用戶:磊子226

  • US Navy VHDL Modelling Guide

      This document was developed under the Standard Hardware and Reliability Program (SHARP) TechnologyIndependent Representation of Electronic Products (TIREP) project. It is intended for use by VHSIC HardwareDescription Language (VHDL) design engineers and is offered as guidance for the development of VHDL modelswhich are compliant with the VHDL Data Item Description (DID DI-EGDS-80811) and which can be providedto manufacturing engineering personnel for the development of production data and the subsequent productionof hardware. Most VHDL modeling performed to date has been concentrated at either the component level orat the conceptual system level. The assembly and sub-assembly levels have been largely disregarded. Under theSHARP TIREP project, an attempt has been made to help close this gap. The TIREP models are based upon lowcomplexity Standard Electronic Modules (SEM) of the format A configuration. Although these modules are quitesimple, it is felt that the lessons learned offer guidance which can readily be applied to a wide range of assemblytypes and complexities.

    標(biāo)簽: Modelling Guide Navy VHDL

    上傳時(shí)間: 2013-11-20

    上傳用戶:pzw421125

  • 基于FPGA+DSP模式的智能相機(jī)設(shè)計(jì)

    針對(duì)嵌入式機(jī)器視覺系統(tǒng)向獨(dú)立化、智能化發(fā)展的要求,介紹了一種嵌入式視覺系統(tǒng)--智能相機(jī)。基于對(duì)智能相機(jī)體系結(jié)構(gòu)、組成模塊和圖像采集、傳輸和處理技術(shù)的分析,對(duì)國內(nèi)外的幾款智能相機(jī)進(jìn)行比較。綜合技術(shù)發(fā)展現(xiàn)狀,提出基于FPGA+DSP模式的硬件平臺(tái),并提出智能相機(jī)的發(fā)展方向。分析結(jié)果表明,該系統(tǒng)設(shè)計(jì)可以實(shí)現(xiàn)脫離PC運(yùn)行,完成圖像獲取與分析,并作出相應(yīng)輸出。 Abstract:  This paper introduced an embedded vision system-intelligent camera ,which was for embedded machine vision systems to an independent and intelligent development requirements. Intelligent camera architecture, component modules and image acquisition, transmission and processing technology were analyzed. After comparing integrated technology development of several intelligent cameras at home and abroad, the paper proposed the hardware platform based on FPGA+DSP models and made clear direction of development of intelligent cameras. On the analysis of the design, the results indicate that the system can run from the PC independently to complete the image acquisition and analysis and give a corresponding output.

    標(biāo)簽: FPGA DSP 模式 智能相機(jī)

    上傳時(shí)間: 2013-11-14

    上傳用戶:無聊來刷下

  • 基于CPLD的QDPSK調(diào)制解調(diào)電路設(shè)計(jì)

    為了在CDMA系統(tǒng)中更好地應(yīng)用QDPSK數(shù)字調(diào)制方式,在分析四相相對(duì)移相(QDPSK)信號(hào)調(diào)制解調(diào)原理的基礎(chǔ)上,設(shè)計(jì)了一種QDPSK調(diào)制解調(diào)電路,它包括串并轉(zhuǎn)換、差分編碼、四相載波產(chǎn)生和選相、相干解調(diào)、差分譯碼和并串轉(zhuǎn)換電路。在MAX+PLUSⅡ軟件平臺(tái)上,進(jìn)行了編譯和波形仿真。綜合后下載到復(fù)雜可編程邏輯器件EPM7128SLC84-15中,測(cè)試結(jié)果表明,調(diào)制電路能正確選相,解調(diào)電路輸出數(shù)據(jù)與QDPSK調(diào)制輸入數(shù)據(jù)完全一致,達(dá)到了預(yù)期的設(shè)計(jì)要求。 Abstract:  In order to realize the better application of digital modulation mode QDPSK in the CDMA system, a sort of QDPSK modulation-demodulation circuit was designed based on the analysis of QDPSK signal modulation-demodulation principles. It included serial/parallel conversion circuit, differential encoding circuit, four-phase carrier wave produced and phase chosen circuit, coherent demodulation circuit, difference decoding circuit and parallel/serial conversion circuit. And it was compiled and simulated on the MAX+PLUSⅡ software platform,and downloaded into the CPLD of EPM7128SLC84-15.The test result shows that the modulation circuit can exactly choose the phase,and the output data of the demodulator circuit is the same as the input data of the QDPSK modulate. The circuit achieves the prospective requirement of the design.

    標(biāo)簽: QDPSK CPLD 調(diào)制解調(diào) 電路設(shè)計(jì)

    上傳時(shí)間: 2013-10-28

    上傳用戶:jyycc

  • 基于FPGA的光纖光柵解調(diào)系統(tǒng)的研究

     波長信號(hào)的解調(diào)是實(shí)現(xiàn)光纖光柵傳感網(wǎng)絡(luò)的關(guān)鍵,基于現(xiàn)有的光纖光柵傳感器解調(diào)方法,提出一種基于FPGA的雙匹配光纖光柵解調(diào)方法,此系統(tǒng)是一種高速率、高精度、低成本的解調(diào)系統(tǒng),并且通過引入雙匹配光柵有效地克服了雙值問題同時(shí)擴(kuò)大了檢測(cè)范圍。分析了光纖光柵的測(cè)溫原理并給出了該方案軟硬件設(shè)計(jì),綜合考慮系統(tǒng)的解調(diào)精度和FPGA的處理速度給出了基于拉格朗日的曲線擬合算法。 Abstract:  Sensor is one of the most important application of the fiber grating. Wavelength signal demodulating is the key techniques to carry out fiber grating sensing network, based on several existing methods of fiber grating sensor demodulation inadequate, a two-match fiber grating demodulation method was presented. This system is a high-speed, high precision, low-cost demodulation system. And by introducing a two-match grating effectively overcomes the problem of double value while expands the scope of testing. This paper analyzes the principle of fiber Bragg grating temperature and gives the software and hardware design of the program. Considering the system of demodulation accuracy and processing speed of FPGA,this paper gives the curve fitting algorithm based on Lagrange.

    標(biāo)簽: FPGA 光纖光柵 解調(diào)系統(tǒng)

    上傳時(shí)間: 2013-10-10

    上傳用戶:zxc23456789

  • 開關(guān)電源EMI設(shè)計(jì)(英文版)

    Integrated EMI/Thermal Design forSwitching Power SuppliesWei ZhangThesis submitted to the Faculty of theVirginia Polytechnic Institute and State Universityin partial fulfillment of the requirements for the degree of Integrated EMI/Thermal Design forSwitching Power SuppliesWei Zhang(ABSTRACT)This work presents the modeling and analysis of EMI and thermal performancefor switch power supply by using the CAD tools. The methodology and design guidelinesare developed.By using a boost PFC circuit as an example, an equivalent circuit model is builtfor EMI noise prediction and analysis. The parasitic elements of circuit layout andcomponents are extracted analytically or by using CAD tools. Based on the model, circuitlayout and magnetic component design are modified to minimize circuit EMI. EMI filtercan be designed at an early stage without prototype implementation.In the second part, thermal analyses are conducted for the circuit by using thesoftware Flotherm, which includes the mechanism of conduction, convection andradiation. Thermal models are built for the components. Thermal performance of thecircuit and the temperature profile of components are predicted. Improved thermalmanagement and winding arrangement are investigated to reduce temperature.In the third part, several circuit layouts and inductor design examples are checkedfrom both the EMI and thermal point of view. Insightful information is obtained.

    標(biāo)簽: EMI 開關(guān)電源 英文

    上傳時(shí)間: 2013-11-16

    上傳用戶:萍水相逢

  • 8259 VHDL代碼

    a8259 可編程中斷控制 altera提供 The a8259 is designed to simplify the implementation of the interrupt interface  in 8088 and 8086  based microcomputer systems. The device is known as a programmable interrupt controller.  The a8259 receives and prioritizes up to 8 interrupts,  and in the cascade mode, this can be expanded up to  64 interrupts. An asynchronous reset and a clock input have been added to improve operation and reliability.

    標(biāo)簽: 8259 VHDL 代碼

    上傳時(shí)間: 2015-01-02

    上傳用戶:panpanpan

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