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可编程逻辑  扩频通信芯片STEL-2000A的FPGA实现

针对传统集成电路（ASIC）功能固定、升级困难等缺点，利用FPGA实现了扩频通信芯片STEL-2000A的核心功能。使用ISE提供的DDS IP核实现NCO模块，在下变频模块调用了硬核乘法器并引入CIC滤波器进行低通滤波，给出了DQPSK解调的原理和实现方法，推导出一种简便的引入?仔/4固定相移的实现方法。采用模块化的设计方法使用VHDL语言 ...

https://www.eeworm.com/dl/kbcluoji/40234.html

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可编程逻辑  基于CPLD的QDPSK调制解调电路设计

为了在CDMA系统中更好地应用QDPSK数字调制方式，在分析四相相对移相（QDPSK)信号调制解调原理的基础上，设计了一种QDPSK调制解调电路，它包括串并转换、差分编码、四相载波产生和选相、相干解调、差分译码和并串转换电路。在MAX+PLUSⅡ软件平台上，进行了编译和波形仿真。综合后下载到复杂可编程逻辑器件EPM7128SLC84-15中 ...

https://www.eeworm.com/dl/kbcluoji/40237.html

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可编程逻辑  基于Verilog HDL设计的多功能数字钟

本文利用Verilog HDL 语言自顶向下的设计方法设计多功能数字钟，突出了其作为硬件描述语言的良好的可读性、可移植性和易理解等优点，并通过Altera QuartusⅡ 4.1 和ModelSim SE 6.0 完成综合、仿真。此程序通过下载到FPGA 芯片后，可应用于实际的数字钟显示中。关键词：Verilog HDL；硬件描述语言；FPGA Abstract: In this ...

https://www.eeworm.com/dl/kbcluoji/40390.html

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可编程逻辑  USB接口控制器参考设计,xilinx提供VHDL代码 us

USB接口控制器参考设计,xilinx提供VHDL代码 usb xilinx vhdl ;&nbsp; This program is free software; you can redistribute it and/or modify ;&nbsp; it under the terms of the GNU General Public License as published by ;&nbsp; the Free Software Foundation; either version 2 of the License, or ;&nbsp; ...

https://www.eeworm.com/dl/kbcluoji/40393.html

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可编程逻辑  计算FR4上的差分阻抗(PDF)

Calculation of the Differential Impedance of Tracks on FR4 substrates There is a discrepancy between calculated and measured values of impedance for differential transmission lineson FR4. This is especially noticeable in the case of surface microstrip configurations. The anomaly is shown tobe due to ...

https://www.eeworm.com/dl/kbcluoji/40417.html

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可编程逻辑  开关电源EMI设计(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 wor ...

https://www.eeworm.com/dl/kbcluoji/40432.html

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可编程逻辑  pci e PCB设计规范

This document provides practical, common guidelines for incorporating PCI Express interconnect layouts onto Printed Circuit Boards (PCB) ranging from 4-layer desktop baseboard designs to 10- layer or more server baseboard designs. Guidelines and constraints in this document are intended for use on b ...

https://www.eeworm.com/dl/kbcluoji/40445.html

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可编程逻辑  8259 VHDL代码

a8259 可编程中断控制 altera提供 The a8259 is designed to simplify the implementation of the interrupt interface&nbsp; in 8088 and 8086&nbsp; based microcomputer systems. The device is known as a programmable interrupt controller.&nbsp; The a8259 receives and prioritizes up to 8 interrupts,&nbsp; ...

https://www.eeworm.com/dl/kbcluoji/40451.html

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工控技术  赛灵思电机控制开发套件简介（英文版）

　　The power of programmability gives industrial automation designers a highly efficient， cost-effective alternative to traditional motor control units （MCUs）。 The parallel-processing power， fast computational speeds， and connectivity versatility of Xilinx&reg; FPGAs can accelerate the impl ...

https://www.eeworm.com/dl/569/40865.html

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工控技术  xilinx FPGAs在工业中的应用

　　The revolution of automation on factory floors is a key driver for the seemingly insatiable demand for higher productivity， lower total cost of ownership，and high safety. As a result， industrial applications drive an insatiable demand of higher data bandwidth and higher system-level perform ...

https://www.eeworm.com/dl/569/40867.html

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