ORCAD在使用的時候總會出現(xiàn)這樣或那樣的問題…但下這個問題比較奇怪…在ORCAD中無法輸出網(wǎng)表…彈出下面的錯誤….這種問題很是奇怪…Netlist Format: tango.dllDesign Name: D:\EDA_PROJECT\PROTEL99SE\YK\SV3200\MAIN.DSNERROR [NET0021] CanNOT get part.[FMT0024] Ref-des NOT found. Possible Logical/Physical anNOTation conflict.[FMT0018] Errors processing intermediate file找了一天沒找到問題…終于在花了N多時間后發(fā)現(xiàn)問題所在…其實這個問題就是不要使用ORCAD PSPICE 庫里面的元件來畫電路圖…實際中我是用了PSPICE里面和自己制作的二種電阻和電容混合在一起…就會出現(xiàn)這種問題…
上傳時間: 2013-11-02
上傳用戶:sz_hjbf
PCB設(shè)計問題集錦 問:PCB圖中各種字符往往容易疊加在一起,或者相距很近,當板子布得很密時,情況更加嚴重。當我用Verify Design進行檢查時,會產(chǎn)生錯誤,但這種錯誤可以忽略。往往這種錯誤很多,有幾百個,將其他更重要的錯誤淹沒了,如何使Verify Design會略掉這種錯誤,或者在眾多的錯誤中快速找到重要的錯誤。 答:可以在顏色顯示中將文字去掉,不顯示后再檢查;并記錄錯誤數(shù)目。但一定要檢查是否真正屬于不需要的文字。 問: What’s mean of below warning:(6230,8330 L1) Latium Rule NOT checked: COMPONENT U26 component rule.答:這是有關(guān)制造方面的一個檢查,您沒有相關(guān)設(shè)定,所以可以不檢查。 問: 怎樣導(dǎo)出jop文件?答:應(yīng)該是JOB文件吧?低版本的powerPCB與PADS使用JOB文件。現(xiàn)在只能輸出ASC文件,方法如下STEP:FILE/EXPORT/選擇一個asc名稱/選擇Select ALL/在Format下選擇合適的版本/在Unit下選Current比較好/點擊OK/完成然后在低版本的powerPCB與PADS產(chǎn)品中Import保存的ASC文件,再保存為JOB文件。 問: 怎樣導(dǎo)入reu文件?答:在ECO與Design 工具盒中都可以進行,分別打開ECO與Design 工具盒,點擊右邊第2個圖標就可以。 問: 為什么我在pad stacks中再設(shè)一個via:1(如附件)和默認的standardvi(如附件)在布線時V選擇1,怎么布線時按add via不能添加進去這是怎么回事,因為有時要使用兩種不同的過孔。答:PowerPCB中有多個VIA時需要在Design Rule下根據(jù)信號分別設(shè)置VIA的使用條件,如電源類只能用Standard VIA等等,這樣操作時就比較方便。詳細設(shè)置方法在PowerPCB軟件通中有介紹。 問:為什么我把On-line DRC設(shè)置為prevent..移動元時就會彈出(圖2),而你們教程中也是這樣設(shè)置怎么不會呢?答:首先這不是錯誤,出現(xiàn)的原因是在數(shù)據(jù)中沒有BOARD OUTLINE.您可以設(shè)置一個,但是不使用它作為CAM輸出數(shù)據(jù). 問:我用ctrl+c復(fù)制線時怎設(shè)置原點進行復(fù)制,ctrl+v粘帖時總是以最下面一點和最左邊那一點為原點 答: 復(fù)制布線時與上面的MOVE MODE設(shè)置沒有任何關(guān)系,需要在右鍵菜單中選擇,這在PowerPCB軟件通教程中有專門介紹. 問:用(圖4)進行修改線時拉起時怎總是往左邊拉起(圖5),不知有什么辦法可以輕易想拉起左就左,右就右。答: 具體條件不明,請檢查一下您的DESIGN GRID,是否太大了. 問: 好不容易拉起右邊但是用(圖6)修改線怎么改怎么下面都會有一條不能和在一起,而你教程里都會好好的(圖8)答:這可能還是與您的GRID 設(shè)置有關(guān),不過沒有問題,您可以將不需要的那段線刪除.最重要的是需要找到布線的感覺,每個軟件都不相同,所以需要多練習。 問: 尊敬的老師:您好!這個圖已經(jīng)畫好了,但我只對(如圖1)一種的完全間距進行檢查,怎么錯誤就那么多,不知怎么改進。請老師指點。這個圖在附件中請老師幫看一下,如果還有什么問題請指出來,本人在改進。謝!!!!!答:請注意您的DRC SETUP窗口下的設(shè)置是錯誤的,現(xiàn)在選中的SAME NET是對相同NET進行檢查,應(yīng)該選擇NET TO ALL.而不是SAME NET有關(guān)各項參數(shù)的含義請仔細閱讀第5部教程. 問: U101元件已建好,但元件框的拐角處不知是否正確,請幫忙CHECK 答:元件框等可以通過修改編輯來完成。問: U102和U103元件沒建完全,在自動建元件參數(shù)中有幾個不明白:如:SOIC--》silk screen欄下spacing from pin與outdent from first pin對應(yīng)U102和U103元件應(yīng)寫什么數(shù)值,還有這兩個元件SILK怎么自動設(shè)置,以及SILK內(nèi)有個圓圈怎么才能畫得與該元件參數(shù)一致。 答:Spacing from pin指從PIN到SILK的Y方向的距離,outdent from first pin是第一PIN與SILK端點間的距離.請根據(jù)元件資料自己計算。
上傳時間: 2014-01-03
上傳用戶:Divine
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 both baseboard and add-in card PCB designs. This includes interconnects between PCI Express devices located on the same baseboard (chip-to-chip routing) and interconnects between a PCI Express device located “down” on the baseboard and a device located “up” on an add-in card attached through a connector. This document is intended to cover all major components of the physical interconnect including design guidelines for the PCB traces, vias and AC coupling capacitors, as well as add-in card edge-finger and connector considerations. The intent of the guidelines and examples is to help ensure that good high-speed signal design practices are used and that the timing/jitter and loss/attenuation budgets can also be met from end-to-end across the PCI Express interconnect. However, while general physical guidelines and suggestions are given, they may NOT necessarily guarantee adequate performance of the interconnect for all layouts and implementations. Therefore, designers should consider modeling and simulation of the interconnect in order to ensure compliance to all applicable specifications. The document is composed of two main sections. The first section provides an overview of general topology and interconnect guidelines. The second section concentrates on physical layout constraints where bulleted items at the beginning of a topic highlight important constraints, while the narrative that follows offers additional insight.
標簽: pci PCB 設(shè)計規(guī)范
上傳時間: 2014-01-24
上傳用戶:s363994250
Have you had the exasperating experience of a laptop orPDA defi antly NOT responding to your commands? Youfrantically press key after key, but to no avail. As hopeturns to anger (but just before you throw the company’slaptop through the window) you slam your fi nger againstthe on/off power button. Ten seconds later, your laptopfi nally surrenders and the screen goes black in a highpitched whimper.
標簽: 427 DN 開關(guān)控制器 故障保護
上傳時間: 2013-12-10
上傳用戶:Vici
This simple SDI NOTepad-like application demonstrates how, taking advantage of the MFC support for Unicode, to Turkmenize labels of the specified menu items. Actually, Turkmen is NOT supported by Windows 2000, therefore, to create such resources as menu so that strings in Turkmen could be displayed I had to invent an additional technique 這是一個與記事本類似的簡單的SDI應(yīng)用程序,演示了怎樣使用MFC來支持 Unicode,對指定的菜單條目進行Turkmenize標簽化。實際上,Windwos 2000并不支持Turknen,因此,創(chuàng)建了那些菜單資源以便那些字符串可以在Turknen中顯示,為此我必須開發(fā)其它的技術(shù)。 來源: http://www.codeguru.com/advancedui/SDI_NOTe.html
標簽: NOTepad-like demonstrates application advantage
上傳時間: 2013-11-26
上傳用戶:txfyddz
留言本 需要修改的地方都有注釋 你可以自行修改 主要有l(wèi)ogin.jsp和jdbc.java里面關(guān)系都數(shù)據(jù)庫連接部分 jdbc你修改編譯之后請放到WEB-INF\classes\wu目錄下面 數(shù)據(jù)庫采用的是mysql 建表語言是: CREATE TABLE liuyan_temp ( id int(6) NOT NULL auto_increment, url varchar(100) default # , ip varchar(20) default NULL, email varchar(50) default # , qq varchar(20) default NULL, sj varchar(30) default NULL, content text, xm varchar(20) default 沒有姓名 , KEY id (id) ) TYPE=MyISAM
標簽: jdbc WEB-INFclasseswu login java
上傳時間: 2014-01-10
上傳用戶:songyue1991
This code will be useful to you if you have tried using ADOCE, but never got anything to work. It is NOT meant to be integrated into any application, but rather it should be used for demonstrative purposes. It clearly shows the basics of how to use the technology.
上傳時間: 2014-01-13
上傳用戶:bcjtao
Tug of War(A tug of war is to be arranged at the local office picnic. For the tug of war, the picnickers must be divided into two teams. Each person must be on one team or the other the number of people on the two teams must NOT differ by more than 1 the total weight of the people on each team should be as nearly equal as possible. The first line of input contains n the number of people at the picnic. n lines follow. The first line gives the weight of person 1 the second the weight of person 2 and so on. Each weight is an integer between 1 and 450. There are at most 100 people at the picnic. Your output will be a single line containing 2 numbers: the total weight of the people on one team, and the total weight of the people on the other team. If these numbers differ, give the lesser first. )
上傳時間: 2014-01-07
上傳用戶:離殤
Filename: main.c * Description: A simple test program for the CRC implementations. * NOTes: To test a different CRC standard, modify crc.h. * * * Copyright (c) 2000 by Michael Barr. This software is placed into * the public domain and may be used for any purpose. However, this * NOTice must NOT be changed or removed and no warranty is either * expressed or implied by its publication or distribution.
標簽: test implementations Description Filename
上傳時間: 2015-02-02
上傳用戶:leehom61
輸入一個任意大小的迷宮,用棧求出一條走出迷宮的路徑,并 顯示在屏幕上。 程序?qū)崿F(xiàn): 可以實現(xiàn)載入迷宮和保存迷宮,附帶文件中有4個測試迷宮路徑的 文件test1~4.dd。請將這些文件拷貝到TC當前目錄下,或者在載 入時寫明完全路徑。由于屏幕大小的限制,當用戶自己輸入迷宮 時一定要注意:迷宮大小是有限制的,不小于4*3,不大于30*20。 否則會出現(xiàn)錯誤信息。輸入開始時全是墻,用上下左右鍵移動, 用Del鍵刪除墻,形成通路,用Enter鍵添加墻。輸入結(jié)束時可以 將迷宮保存下來,以dd為擴展名。輸入完畢時用F9鍵來得到結(jié)果, 找到路徑時,屏幕下方會出現(xiàn)Path found,否則出現(xiàn)Path NOT found。 程序經(jīng)Turbo C 2.0編譯調(diào)試成功。運行時不用添加任何運行庫。 不可以在VC上編譯。
上傳時間: 2014-01-10
上傳用戶:thinode
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