The serious study of the practice of how to determine the appropriate content of a specification is a seldom-appreciated pastime. Those who have the responsibility to design a product would prefer a greater degree of freedom than permitted by the con- tent of a specification. Many of those who would manage those who would design a product would prefer to allocate all of the project funding and schedule to what they consider more productive labor. These are the attitudes, of course, that doom a project to defeat but they are hard to counter no matter how many times repeated by design engineers and managers. A system engineer who has survived a few of these experiences over a long career may retire and forget the past but we have an endur- ing obligation to work toward changing these attitudes while trying to offer younger system engineers a pathway toward a more sure success in requirements analysis and specification publishing.
標(biāo)簽: Requirements Analysis System
上傳時(shí)間: 2020-06-01
上傳用戶:shancjb
經(jīng)典書籍Static Timing Analysis for Nanometer Designs A Practical Approach漢化版本,非常有用
標(biāo)簽: 靜態(tài)時(shí)序分析
上傳時(shí)間: 2021-12-06
上傳用戶:
Analysis and Design of Analog integrated circuit 4th的習(xí)題答案
標(biāo)簽: 模擬電路
上傳時(shí)間: 2022-06-02
上傳用戶:qdxqdxqdxqdx
Electronic Design Automation-synthesis,verification and test 電子書PDF下載 971頁 國立臺(tái)灣大學(xué)江介宏教授 該書是電子設(shè)計(jì)自動(dòng)化,綜合,驗(yàn)證和測試的經(jīng)典書籍之一。
標(biāo)簽: Automation-synthesis verification Electronic Design test 971 and PDF 電子書 下載
上傳時(shí)間: 2022-06-28
上傳用戶:ankee
《HyperLynx Signal Integrity Analysis Student Workbook》對(duì)信號(hào)完整性的定義進(jìn)行了詳細(xì)介紹,同時(shí)介紹了Hyperlynx的用法。
標(biāo)簽: HyperLynxSignalIntegrityAnalysisS tudentWorkbook
上傳時(shí)間: 2013-04-24
上傳用戶:Wwill
DDS(Direct Digital Synthesis直接數(shù)字頻率合成技術(shù))是廣泛應(yīng)用的信號(hào)生成方法,其優(yōu)點(diǎn)是易于程控,輸出頻率分辨率高,同時(shí)芯片的集成度高,適合于嵌入式系統(tǒng)設(shè)計(jì)。針對(duì)現(xiàn)有的壓電陶瓷電源輸出波形頻率、相位等不能程控、電路集成度不高、體積和功耗較大等問題,本文以ARM作為控制電路核心,引入DDS技術(shù)產(chǎn)生輸出的波形信號(hào),并由集成高壓運(yùn)放將波形信號(hào)提高至輸出級(jí)的電壓和功率。 在壓電陶瓷電源硬件電路中采用了模塊化設(shè)計(jì),主要分為ARM控制電路、DDS系統(tǒng)驅(qū)動(dòng)電路和波形調(diào)理電路、高壓運(yùn)放電路等幾個(gè)部分。電源控制電路以三星公司的S3C2440控制器為核心,以觸摸屏作為人機(jī)輸入界面;DDS芯片選用ADI公司的AD9851,設(shè)計(jì)了DDS系統(tǒng)外圍驅(qū)動(dòng)電路,濾波和信號(hào)調(diào)理電路,并應(yīng)用了將DDS與鎖相環(huán)技術(shù)相結(jié)合的雜散問題解決方案;高壓運(yùn)放電路由兩級(jí)運(yùn)放電路組成,采用了電壓控制型驅(qū)動(dòng)原理,放大電路的核心是PA92集成高壓運(yùn)放,加入了補(bǔ)償電路以提高系統(tǒng)的響應(yīng)帶寬,并在電源輸出設(shè)置了過電流保護(hù)和快速放電的放電回路。 電源軟件部分采用WINCE嵌入式系統(tǒng),根據(jù)WINCE系統(tǒng)驅(qū)動(dòng)架構(gòu)設(shè)計(jì)DDS芯片的流接口程序,編寫了流接口函數(shù)和配置文件,并將流驅(qū)動(dòng)程序集成入WINCE系統(tǒng);編寫了基于EVC的觸摸屏人機(jī)界面主程序,由主程序?qū)⒂脩糨斎雲(yún)?shù)轉(zhuǎn)換為DDS芯片的控制字,并采用動(dòng)態(tài)加載流驅(qū)動(dòng)方式將控制字送入DDS芯片實(shí)現(xiàn)了對(duì)其輸出的控制。 對(duì)電源進(jìn)行了不同典型波形輸出的測試實(shí)驗(yàn)。在實(shí)驗(yàn)中,測試了DDS信號(hào)波形輸出的精度和分辨率、電源動(dòng)態(tài)輸出精度和對(duì)信號(hào)波形的跟隨性和響應(yīng)性能。實(shí)驗(yàn)表明,壓電陶瓷電源輸出信號(hào)波形精度較高,對(duì)波形、頻率等參數(shù)改變的響應(yīng)速度快,達(dá)到電源輸出穩(wěn)定性要求。
標(biāo)簽: ARM DDS 壓電陶瓷 驅(qū)動(dòng)
上傳時(shí)間: 2013-04-24
上傳用戶:haoxiyizhong
這600本書幾乎包括了電氣工程專業(yè)的所有內(nèi)容。 例如:電子學(xué)最基礎(chǔ)的 《Circuit.Analysis.Theory.And.Practice.》(電路分析)、 哈佛大學(xué)的經(jīng)典教材 《The.Art.of.Electronics》(電子學(xué)的藝術(shù))、DSP.Facts.and.Equipment。
上傳時(shí)間: 2013-08-02
上傳用戶:lw4463301
藍(lán)牙協(xié)議及其源代碼分析。講述藍(lán)牙協(xié)議及原理-Bluetooth protocol and its source code analysis. About the Bluetooth protocol
標(biāo)簽: bluetooth
上傳時(shí)間: 2013-06-18
上傳用戶:123312
MATLAB仿真通信PSK誤碼分析,主要用來測試SNR從0到10時(shí)的系統(tǒng)性能-MATLAB simulation PSK communication error analysis
上傳時(shí)間: 2013-04-24
上傳用戶:924484786
從時(shí)域分析比較了ofdm和stbc與ofdm結(jié)合的性能差別-from time-domain analysis and comparison of OFDM stbc OFDM combined wi
上傳時(shí)間: 2013-06-05
上傳用戶:caozhizhi
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