摘要本文介紹了一種用CPLD設(shè)計GPS數(shù)字通道相關(guān)器中C/A碼產(chǎn)生囂的方法,詳細(xì)分析了設(shè)計原理并給出了相應(yīng)的仿真結(jié)果.這種設(shè)計方法已在我們研制的GPS,GLONASS兼容機中得到實際應(yīng)用。
上傳時間: 2013-09-01
上傳用戶:wangdean1101
Building a RISC System in an FPGA
標(biāo)簽: Building System RISC FPGA
上傳時間: 2013-09-04
上傳用戶:朗朗乾坤
gerber-to-protel is a pdf file ,which is used for convert bmp to pcb.
標(biāo)簽: gerber-to-protel file is
上傳時間: 2013-09-18
上傳用戶:liuxinyu2016
protel_lib-PIC16 is a protel lib file.
標(biāo)簽: protel_lib-PIC protel file lib
上傳時間: 2013-09-18
上傳用戶:hn891122
Many CAD users dismiss schematic capture as a necessary evil in the process of creating\r\nPCB layout but we have always disputed this point of view. With PCB layout now offering\r\nautomation of both component placement and track routing, getting the des
標(biāo)簽: schematic necessary creating dismiss
上傳時間: 2013-09-25
上傳用戶:baiom
The trend in ADCs and DACs is toward higher speeds and higher resolutions atreduced power levels. Modern data converters generally operate on ±5V (dualsupply) or +5V (single supply). In fact, many new converters operate on a single +3Vsupply. This trend has created a number of design and applications problems whichwere much less important in earlier data converters, where ±15V supplies and ±10Vinput ranges were the standard.
標(biāo)簽: ADC 信號調(diào)節(jié) 傳感器
上傳時間: 2013-11-16
上傳用戶:sjw920325
Abstract: A digital RF modulator, an integrated solution that satisfies stringent DOCSIS RF-performancerequirements, takes advantage of modern technologies like high-performance wideband digital-to-analogconversion and CMOS technology scaling. This application note describes the concept and advantages ofa digital quadrature amplitude modulation (QAM) modulator that uses the direct-RF architecture to enablea cable access platform (CCAP) system.
標(biāo)簽: 集成 數(shù)字RF 調(diào)制器 方案
上傳時間: 2013-10-20
上傳用戶:drink!
常用D/A轉(zhuǎn)換器和A/D轉(zhuǎn)換器介紹 下面我們介紹一下其它常用D/A轉(zhuǎn)換器和 A/D 轉(zhuǎn)換器,便于同學(xué)們設(shè)計時使用。 1. DAC0808 圖 1 所示為權(quán)電流型 D/A 轉(zhuǎn)換器 DAC0808 的電路結(jié)構(gòu)框圖。用 DAC0808 這類器件構(gòu) 成的 D/A轉(zhuǎn)換器,需要外接運算放大器和產(chǎn)生基準(zhǔn)電流用的電阻。DAC0808 構(gòu)成的典型應(yīng)用電路如圖2 所示。
標(biāo)簽: 轉(zhuǎn)換器
上傳時間: 2014-12-23
上傳用戶:zhenyushaw
isoad系列產(chǎn)品實現(xiàn)傳感器和主機之間的信號安全隔離和高精度數(shù)字采集與傳輸,廣泛應(yīng)用于rs-232/485總線工業(yè)自動化控制系統(tǒng),4-20ma / 0-10v信號測量、監(jiān)視和控制,小信號的測量以及工業(yè)現(xiàn)場信號隔離及長線傳輸?shù)冗h(yuǎn)程監(jiān)控場合。通過軟件的配置,可接入多種傳感器類型,包括電流輸出型、電壓輸出型、以及熱電偶等等。 產(chǎn)品內(nèi)部包括電源隔離,信號隔離、線性化,a/d轉(zhuǎn)換和rs-485串行通信等模塊。每個串口最多可接256只iso ad系列模塊,通訊方式采用ascii 碼字符通訊協(xié)議或modbus rtu通訊協(xié)議,其指令集兼容于adam模塊,波特率可由用戶設(shè)置,能與其他廠家的控制模塊掛在同一rs-485總線上,便于主機編程。 isoad系列產(chǎn)品是基于單片機的智能監(jiān)測和控制系統(tǒng),所有用戶設(shè)定的校準(zhǔn)值,地址,波特率,數(shù)據(jù)格式,校驗和狀態(tài)等配置信息都儲存在非易失性存儲器eeprom里。 isoad系列產(chǎn)品按工業(yè)標(biāo)準(zhǔn)設(shè)計、制造,信號輸入 / 輸出之間隔離,可承受3000vdc隔離電壓,抗干擾能力強,可靠性高。工作溫度范圍- 45℃~+80℃。
標(biāo)簽: 20 mA D轉(zhuǎn)換 模擬信號
上傳時間: 2013-11-23
上傳用戶:comer1123
Abstract: It is incredible how many programmable logic controls (PLCs) around us make our modern life possible and pleasant.Machines in our homes heat and cool our air and water, as well as preserve and cook our food. This tutorial explains the importanceof PLCs, and describes how to choose component parts using the parametric tools on the Maxim's website.A similar version of this article was published February 29, 2012 in John Day's Automotive Electronic News.
上傳時間: 2013-11-10
上傳用戶:liaocs77
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