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可编程逻辑 pcb layout design(台湾硬件工程师15年经验
PCB LAYOUT 術語解釋(TERMS)1. COMPONENT SIDE(零件面、正面)︰大多數零件放置之面。2. SOLDER SIDE(焊錫面、反面)。3. SOLDER MASK(止焊膜面)︰通常指Solder Mask Open 之意。4. TOP PAD︰在零件面上所設計之零件腳PAD，不管是否鑽孔、電鍍。5. BOTTOM PAD：在銲錫面上所設計之零件腳PAD，不管是否鑽孔、電鍍。6. POSITIV ...
可编程逻辑 PCB设计问题集锦
PCB设计问题集锦
问：PCB图中各种字符往往容易叠加在一起，或者相距很近，当板子布得很密时，情况更加严重。当我用Verify Design进行检查时，会产生错误，但这种错误可以忽略。往往这种错误很多，有几百个，将其他更重要的错误淹没了，如何使Verify Design会略掉这种错误，或者在众多的错误中快速找到重要的错误。 答 ...
可编程逻辑 IC封裝製程簡介(IC封装制程简介)
半導體的產品很多，應用的場合非常廣泛，圖一是常見的幾種半導體元件外型。半導體元件一般是以接腳形式或外型來劃分類別，圖一中不同類別的英文縮寫名稱原文為
 
PDID：Plastic Dual Inline Package
SOP：Small Outline Package
SOJ：Small Outline J-Lead Package
PLCC：Plastic Leaded Chip Carrier
QFP：Quad Fla ...
可编程逻辑 PCB LAYOUT初学者必看！
PCB LAYOUT技术大全---初学者必看！ 
PROTEL相关疑问
1.原理图常见错误：
（1）ERC报告管脚没有接入信号：
a. 创建封装时给管脚定义了I/O属性;
b.创建元件或放置元件时修改了不一致的grid属性,管脚与线没有连上;
c. 创建元件时pin方向反向,必须非pin name端连线。
（2）元件跑到图纸界外：没有在 ...
家庭/个人应用 This a full 3-tier dababase application which includes a activex dll project(business objects) and a
This a full 3-tier dababase application which includes a activex dll project(business objects) and a standard exe(UI). Besides all the database techniques it demonstrates, it also shows how to make MSHFlexgrid a editable grid(with combobox, checkbox, datetimepicker) and how to merge a toolbar for mu ...
matlab例程 This a very simple Yee algorithm 3D FDTD code in C implementing the free space form of Maxwell s equ
This a very simple Yee algorithm 3D FDTD code in C implementing the free space form of Maxwell s equations on a Cartesian grid. There are no internal materials or geometry. The code as delivered simulates an idealized rectangular waveguide by treating the interior of the mesh as free space/air and e ...
Windows Mobile The C# program will display a mine field, plant mines, and provide hints on the number of mines arou
The C# program will display a mine field, plant mines, and provide hints on the number of mines around each grid. The player can therefore enjoy a typical Minesweeper game on a Smartphone.
matlab例程 LINEINTRGAL Line Integral in a 2D Vector Field. LINEINTRGAL(X,Y,U,V,C) computes the line integral a
LINEINTRGAL Line Integral in a 2D Vector Field.
LINEINTRGAL(X,Y,U,V,C) computes the line integral along the lines given in cell array C.
X and Y define the coordinates of a rectangular grid over which
U and V are defined. X and Y must be monotonic and 2D plaid as
％ produced by MESHGRID. X, Y, U, an ...
Java编程 an external program called from Adam s FitnessFunction class in order to evaluate the fitness of a
an external program called from Adam s FitnessFunction class in
order to evaluate the fitness of a genome within a distributed grid.