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:針對現(xiàn)場可編程門陣列(FPGA)芯片的特點(diǎn),研究FPGA中雙向端口I/O的設(shè)計(jì),同時給出仿真初始化雙向端口I/O的方法。采用這種雙向端口的設(shè)計(jì)方法,選用Xilinx的Spartan2E芯片設(shè)計(jì)一個多通道圖像信號處理系統(tǒng)。
標(biāo)簽：
FPGA
雙向端口
上傳時間：
2013-08-17
上傳用戶：xiaoyunyun
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一種基于CPLD和PC I總線的視頻采集卡的設(shè)計(jì)方案
標(biāo)簽：
CPLD
總線
卡的設(shè)計(jì)
視頻采集
上傳時間：
2013-08-24
上傳用戶：123啊
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POWER PCB轉(zhuǎn)PROTEL的方法，詳細(xì)說明了其轉(zhuǎn)換過程。
標(biāo)簽：
PROTEL
POWER
PCB
上傳時間：
2013-09-11
上傳用戶：cjl42111
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power pcb To protel 軟件
標(biāo)簽：
protel
power
pcb
To
上傳時間：
2013-09-11
上傳用戶：sunshine1402
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protel 99se 使用技巧以及常見問題解決方法：里面有一些protel 99se 特別技巧，還有我們經(jīng)常遇到的一些問題！如何使一條走線至兩個不同位置零件的距離相同?
您可先在Design/Rule/High Speed/Matched Net Lengths的規(guī)則中來新增規(guī)則設(shè)定,最后再用Tools/EqualizeNet Lengths 來等長化即可。
Q02、在SCHLIB中造一零件其PIN的屬性，如何決定是Passive, Input, I/O, Hi-
Z,Power,…..？在HELP中能找到說明嗎？市面有關(guān) SIM？PLD？的書嗎？或貴公司有講義？
你可在零件庫自制零件時點(diǎn)選零件Pin腳,并在Electrical Type里,可以自行設(shè)定PIN的
屬性,您可參考臺科大的Protel sch 99se 里面有介紹關(guān)于SIM的內(nèi)容。
Q03、請問各位業(yè)界前輩,如何能順利讀取pcad8.6版的線路圖,煩請告知
Protel 99SE只能讀取P-CAD 2000的ASCII檔案格式,所以你必須先將P-CAD8.6版的格式轉(zhuǎn)為P-CAD 2000的檔案格式,才能讓Protel讀取。
Q04、請問我該如何標(biāo)示線徑大小的那個平方呢
你可以將格點(diǎn)大小設(shè)小,還有將字形大小縮小,再放置數(shù)字的平方位置即可。
Q05、請問我一次如何更改所有組件的字型
您可以點(diǎn)選其中一個組件字型,再用Global的方法就可以達(dá)成你的要求。
標(biāo)簽：
protel
99
se
使用技巧
上傳時間：
2013-10-22
上傳用戶：yd19890720
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Q01、如何使一條走線至兩個不同位置零件的距離相同?
您可先在Design/Rule/High Speed/Matched Net Lengths的規(guī)則中來新增規(guī)則設(shè)定,最
后再用Tools/EqualizeNet Lengths 來等長化即可。
Q02、在SCHLIB中造一零件其PIN的屬性，如何決定是Passive, Input, I/O, Hi-
Z,Power,…..？在HELP中能找到說明嗎？市面有關(guān) SIM？PLD？的書嗎？或貴公司有講義？
你可在零件庫自制零件時點(diǎn)選零件Pin腳,并在Electrical Type里,可以自行設(shè)定PIN的
屬性,您可參考臺科大的Protel sch 99se 里 面有介紹關(guān)于SIM的內(nèi)容。
Q03、請問各位業(yè)界前輩,如何能順利讀取pcad8.6版的線路圖,煩請告知
Protel 99SE只能讀取P-CAD 2000的ASCII檔案格式,所以你必須先將P-CAD8.6版的格式
轉(zhuǎn)為P-CAD 2000的檔案格式,才能讓Protel讀取。
標(biāo)簽：
Protel
上傳時間：
2013-11-22
上傳用戶：daxigua
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Abstract: This application note presents an overview of the operational characteristics of accurate I²C real-time clocks (RTCs),including the DS3231, DS3231M, and DS3232. It focuses on general application guidelines that facilitate use of device resources forpower management, I²C communication circuit configurations, and I²C characteristics relative to device power-up sequences andinitializations. Additional discussions on decoupling are provided to support developing strategies for mitigating power-supply pushingof device frequency.
標(biāo)簽：
I2C
高精度
實(shí)時時鐘
上傳時間：
2013-11-23
上傳用戶：WMC_geophy
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Recent advances in low voltage silicon germaniumand BiCMOS processes have allowed the design andproduction of very high speed amplifi ers. Because theprocesses are low voltage, most of the amplifi er designshave incorporated differential inputs and outputs to regainand maximize total output signal swing. Since many lowvoltageapplications are single-ended, the questions arise,“How can I use a differential I/O amplifi er in a single-endedapplication?” and “What are the implications of suchuse?” This Design Note addresses some of the practicalimplications and demonstrates specifi c single-endedapplications using the 3GHz gain-bandwidth LTC6406differential I/O amplifi er.
標(biāo)簽：
單端應(yīng)用
差分
放大器
上傳時間：
2013-11-23
上傳用戶：rocketrevenge
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This application note describes a Linear Technology "Half-Flash" A/D converter, the LTC1099, being connected to a 256 element line scan photodiode array. This technology adapts itself to handheld (i.e., low power) bar code readers, as well as high resolution automated machine inspection applications..
標(biāo)簽：
1099
LTC
8位
AD轉(zhuǎn)換
上傳時間：
2013-11-21
上傳用戶：lchjng
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Radio Frequency Integrated Circuit Design
I enjoyed reading this book for a number of reasons. One reason is that itaddresses high-speed analog design in the context of microwave issues. This isan advanced-level book, which should follow courses in basic circuits andtransmission lines. Most analog integrated circuit designers in the past workedon applications at low enough frequency that microwave issues did not arise.As a consequence, they were adept at lumped parameter circuits and often notcomfortable with circuits where waves travel in space. However, in order todesign radio frequency (RF) communications integrated circuits (IC) in thegigahertz range, one must deal with transmission lines at chip interfaces andwhere interconnections on chip are far apart. Also, impedance matching isaddressed, which is a topic that arises most often in microwave circuits. In mycareer, there has been a gap in comprehension between analog low-frequencydesigners and microwave designers. Often, similar issues were dealt with in twodifferent languages. Although this book is more firmly based in lumped-elementanalog circuit design, it is nice to see that microwave knowledge is brought inwhere necessary.Too many analog circuit books in the past have concentrated first on thecircuit side rather than on basic theory behind their application in communications.The circuits usually used have evolved through experience, without asatisfying intellectual theme in describing them. Why a given circuit works bestcan be subtle, and often these circuits are chosen only through experience. Forthis reason, I am happy that the book begins first with topics that require anintellectual approach—noise, linearity and filtering, and technology issues. Iam particularly happy with how linearity is introduced (power series). In therest of the book it is then shown, with specific circuits and numerical examples,how linearity and noise issues arise.
標(biāo)簽：
Rogers
Radio
John
Freq
上傳時間：
2014-12-23
上傳用戶：han_zh
