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This Application Note covers the basics of how to use Verilog as applied to ComplexProgrammable Logic Devices. Various combinational logic circuit examples, such asmultiplexers, decoders, encoders, comparators and adders are provided. Synchronous logiccircuit examples, such as counters and state m ...

  Finite state machines are widely used in digital circuit designs. Generally, when designing a state machine using an HDL, the synthesis tools will optimize away all states that cannot be reached and generate a highly optimized circuit. Sometimes, however, the optimization is not acceptabl ...

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 ...

【摘要】本文结合作者多年的印制板设计经验，着重印制板的电气性能，从印制板稳定性、可靠性方面，来讨论多层印制板设计的基本要求。【关键词】印制电路板；表面贴装器件；高密度互连；通孔【Key words】Printed Circuit Board；Surface Mounting Device；High Density Interface；Via一．概述印制板（PCB－Printed Circuit ...

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 ...

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 ...

|Introduction􀂄􀂄 Basic Concept􀂄􀂄 Tips to layout Power circuit􀂄􀂄 Type of Power circuit Basic Concept􀂄􀂄 Maximum Current calculation􀂄􀂄 Resistance of Copper􀂄􀂄 ideal power supply & noise􀂄&# ...

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 ...

阻抗匹配 　阻抗匹配（Impedance matching）是微波电子学里的一部分，主要用于传输线上，来达至所有高频的微波信号皆能传至负载点的目的，不会有信号反射回来源点，从而提升能源效益。　　大体上，阻抗匹配有两种，一种是透过改变阻抗力（lumped-circuit matching），另一种则是调整传输线的波长（transmission line matchi ...

西门子建筑电器-电气安装技术部发行的各类产品样本：小型断路器、剩余电流保护断路器和模数化产品(中/ 英文)Miniature Circuit-Breakers, Residual Current Operated Circuit-Breakers and Modular Devices (Chinese/English)低压熔断器系统(中/ 英文)Fuse System (Chinese/English)雷击，过电压－不再是问题(中文)Thunders ...