電學(xué)中的測(cè)量技術(shù)涉及范圍非常廣,電流測(cè)量在電學(xué)計(jì)量中占有非常重要的位置。如何精確地進(jìn)行電流測(cè)量是精密測(cè)量的一大難題。傳統(tǒng)的電流檢測(cè)電路多采用運(yùn)算放大芯片與片外電流檢測(cè)電路相結(jié)合的方式,電路集成度很低,需要較多的接口和資源才能完成對(duì)電路的檢測(cè)。本文把所有電路部分都集成在一塊芯片上,包括檢測(cè)電阻,運(yùn)算放大器電路及模擬轉(zhuǎn)數(shù)字轉(zhuǎn)換電路,從而在電路內(nèi)部可以進(jìn)行電流檢測(cè),使電路更好的集成化。前置電路使用二級(jí)共源共柵結(jié)構(gòu)的運(yùn)算放大器,減小溝道長(zhǎng)度調(diào)制效應(yīng)造成的電流誤差。10位SAR ADC中采用電容驅(qū)動(dòng)能力強(qiáng)的傳輸門(mén)保證了模數(shù)轉(zhuǎn)化器的有效精度。比較器模塊采用再生鎖存器與遲滯比較器作為基礎(chǔ)單元組合解決精密測(cè)量的問(wèn)題。本設(shè)計(jì)可以作為嵌入芯片內(nèi)的一小部分而檢測(cè)芯片中的微小電流1mA~100mA,工作電壓在1.8v左右,電流檢測(cè)精度預(yù)期達(dá)到10uA的需求。The measurement technology in electricity involves a wide range,and current measurement plays a very important position in electrical measurement.How to accurately measure current is a big problem in precision measurement. The traditional current detecting circuit adopts the combination of the operational amplifier chip and theoff-chip current detecting circuit, The circuit integration is very low, and more interfaces and resources are needed tocomplete the circuit detection.This topic integrates all the circuit parts into one chip, including detection resistance, operational amplifier circuit andanalog to digital conversion circuit. Highly integrated circuit makes the external resources on the chip more intensive,so that current detection can be carried out inside the circuit, so that the circuit can be better integrated. Thefront-end circuit of this project uses two-stage cascade operational amplifier and cascade tube to reduce the currenterror caused by channel length modulation effect. In 10-bit SAR ADC, the transmission gate with strong capacitivedriving ability ensures the effective accuracy of the analog-to-digital converter. Comparator module uses regenerativelatch and hysteresis comparator as basic unit to solve the difficult problem of precision measurement. This topic can beused as a small part of the embedded chip to detect the micro-current in the chip 1 mA~100 mA, the working voltageis about 1.8v, and the current detection accuracy is expected to reach the requirement of 10 uA.
標(biāo)簽： 電流檢測(cè) 電路 運(yùn)算放大器 adc
上傳時(shí)間： 2022-04-03
上傳用戶：
本文首次設(shè)計(jì)并驗(yàn)證了基于macom三合一芯片設(shè)計(jì)的光模塊電路,該電路旨在提供一種滿足SFF-8472中規(guī)定的數(shù)字診斷功能的低成本SFP+模塊。電路采用激光器驅(qū)動(dòng)、限幅放大器、控制器以及時(shí)鐘恢復(fù)單元集成的單芯片,在保證高精度數(shù)字診斷功能基礎(chǔ)上,實(shí)現(xiàn)了低成本高可靠的特點(diǎn)。該電路在光接收接口組件與激光器驅(qū)動(dòng)和限幅放大器單元的限幅放大器部分之間接入濾波器來(lái)提高模塊的靈敏度及信號(hào)質(zhì)量。在控制器單元的數(shù)字電位器的引腳上采用外加電阻的方式避免出現(xiàn)上電不發(fā)光的故障問(wèn)題。該研究結(jié)果為下一代SFP-DD光模塊設(shè)計(jì)與開(kāi)發(fā)工作,奠定了一定的理論與實(shí)踐基礎(chǔ)。This paper designs and validates the optical module circuit based on the MACOM Trinity chip for the first time.This circuit aims to provide a low-cost SFP module which meets the digital diagnosis function specified in SFF-8472.The circuit uses a single chip integrated with laser driver,limiting amplifier,controller and clock recovery unit.On the basis of ensuring high precision digital diagnosis function,it achieves the characteristics of low cost and high reliability.The circuit connects a filter between the optical receiving interface module and the limiting amplifier part of the laser driver and limiting amplifier unit to improve the sensitivity and signal quality of the module.The pin of the digital potentiometer in the controller unit is equipped with an external resistance to avoid the problem of power failure.The research results lay a theoretical and practical foundation for optical module design in high-speed data center.
上傳時(shí)間： 2022-04-03
上傳用戶：
搶答器是一種智力競(jìng)賽常用的器件,搶答器的設(shè)計(jì)方法千差萬(wàn)別,文章利用常用的數(shù)字電子器件,設(shè)計(jì)了八路搶答器電路的設(shè)計(jì)、仿真及實(shí)現(xiàn)的全過(guò)程,提出兩種可行的設(shè)計(jì)方案:方案1采用74ls373實(shí)現(xiàn)電路鎖存,74ls148實(shí)現(xiàn)電路編碼,74ls74及數(shù)碼管實(shí)現(xiàn)電路顯示;方案二采用CD4511BCN和LMC555CM集成電路及數(shù)碼管實(shí)現(xiàn)搶答器的控制和顯示。本文設(shè)計(jì)用的器件簡(jiǎn)單,容易理解,適用于初學(xué)電子技術(shù)的人員。Answer scrambler is a common device in intelligence competition, and its design methods vary greatly. This paper designs the whole process of design, simulation and Realization of the circuit of eight-way answer scrambler by using common digital electronic devices, and puts forward two feasible design schemes: scheme 1 uses 74 ls373 to realize circuit latching, 74 ls148 to realize circuit coding,74 ls74 and digital tube to realize circuit. The second scheme uses CD4511 BCN, LMC555 CM integrated circuit and digital tube to control and display the answerer. The device designed in this paper is simple and easy to understand, and it is suitable for the beginners of electronic technology.
標(biāo)簽： 搶答器
上傳時(shí)間： 2022-04-05
上傳用戶：
實(shí)驗(yàn)教學(xué)一直是工科教學(xué)中不可或缺的組成部分,對(duì)培養(yǎng)學(xué)生的動(dòng)手能力,獨(dú)立思考能力,創(chuàng)新思維與發(fā)散思維具有重要的作用。針對(duì)目前電路教學(xué)實(shí)驗(yàn)中電路仿真實(shí)驗(yàn)與實(shí)物電路實(shí)驗(yàn)各自獨(dú)立,無(wú)法統(tǒng)一問(wèn)題,提出將仿真電路實(shí)驗(yàn)與實(shí)物電路實(shí)驗(yàn)有機(jī)的結(jié)合同步操作,并使用Web發(fā)布實(shí)現(xiàn)遠(yuǎn)程實(shí)驗(yàn)操作。采用Multisim作為電路實(shí)驗(yàn)仿真平臺(tái),NI Eiviss II作為實(shí)物電路實(shí)驗(yàn)硬件平臺(tái),運(yùn)用LabVIEW整合Multisim電路仿真實(shí)驗(yàn)與實(shí)物電路實(shí)驗(yàn),實(shí)現(xiàn)仿真與實(shí)物實(shí)驗(yàn)有機(jī)結(jié)合,兩種實(shí)驗(yàn)可同步進(jìn)行。學(xué)生在仿真實(shí)驗(yàn)中先可探索實(shí)驗(yàn),然后做實(shí)物實(shí)驗(yàn)。同時(shí)運(yùn)用LabVIEW開(kāi)發(fā)出實(shí)驗(yàn)過(guò)程人機(jī)交互操作接口界面,使用過(guò)程中效果良好。Experimental teaching has always been an indispensable part of engineering education.And it always plays an important role in cultivating students'practical ability,independent thinking ability,innovative thinking and divergent thinking.But simulation experiment and physical experiment cannot be unified in the circuit teaching experiment at present.In order to solve this problem,this paper proposes to combine organically the simulation circuit experiment with physical circuit experiment,and synchronously operate them.This paper uses the WEB publishing to achieve remote experimental operation.Multisim is used as the circuit simulation platform,and NI Eiviss II is used as the physical circuit hardware platform.Multisim circuit simulation experiment and physical circuit experiment are implemented by LabVIEW to realize the combination of simulation experiment and physical experiment.Students do explore experiments in simulation experiment firstly,and then do physical experiment.And this paper uses LabVIEW to develop the experimental man-machine interface.
上傳時(shí)間： 2022-04-05
上傳用戶：
VIP專區(qū)-嵌入式/單片機(jī)編程源碼精選合集系列（65）資源包含以下內(nèi)容：1. DM9161應(yīng)用電路原理圖來(lái)自DAVICOM網(wǎng)站。需要的可以自由下載.2. ALTERA CPLD器件的配置與下載,貢獻(xiàn)給初學(xué)習(xí)者,非長(zhǎng)有用.3. This design package includes reference materials for creating a USB - PS/2 combination mouse that a.4. 字符表示的十六進(jìn)制數(shù)轉(zhuǎn)化為相應(yīng)的整數(shù) 錯(cuò)誤則返回 -1 .5. C51的12864m.6. 8個(gè)字LED點(diǎn)陣的顯示程序.7. 51＋ch375超級(jí)經(jīng)典的U盤(pán)讀寫(xiě)程序嘿嘿趕快下載把.8. PWM控制電機(jī)C程序-已通過(guò)實(shí)驗(yàn)測(cè)試 PWM控制精確控制電機(jī)的轉(zhuǎn)動(dòng)..9. C51串口單工通訊程序一成功通過(guò)測(cè)試,請(qǐng)放心下載.10. 來(lái)自網(wǎng)上好心人的好東東,關(guān)于SD卡讀寫(xiě)的,內(nèi)附protel原理圖.11. 設(shè)計(jì)輸入 ! 多種設(shè)計(jì)輸入方法 – Quartus II • 原理圖式圖形設(shè)計(jì)輸入 • 文本編輯 – AHDL, VHDL, Verilog • 內(nèi)存編輯 .12. 全是FPGA的例子 對(duì)大家應(yīng)該有好處 大家趕快下把 知識(shí)不等人.13. 此為編程代碼示例.14. 此為編程代碼示例.15. 我在spartan-3e starter kit 的板上實(shí)現(xiàn)了mc8051.16. 完成MP3播放功能.17. 一個(gè)關(guān)于實(shí)時(shí)時(shí)鐘驅(qū)動(dòng)方面的程序（ARM7）.18. 遍歷二叉樹(shù)的4個(gè)非遞歸算法 vc編程基礎(chǔ).19. 快速排序的非遞歸算法 vc編程練習(xí).20. 雷達(dá)高頻接收機(jī).21. 我的開(kāi)發(fā)板的所有測(cè)試程序.22. ps2的驅(qū)動(dòng).23. 密度測(cè)試儀的源碼.24. 本程序主要內(nèi)容18b20+s52+uart單點(diǎn)測(cè)溫詳細(xì)c51程序.25. CPLD 9536 程序 我自己用的代碼. VHDL語(yǔ)言.26. AMD嵌入式處理器AU1200開(kāi)發(fā)板原理圖.27. cpld3128開(kāi)發(fā)板的原理圖 很有用,已經(jīng)做成PCB,需要的話可以聯(lián)系我.28. ertfs文件系統(tǒng)里面既有完整ucos程序.29. 基于atmega128的交通信號(hào)燈控制程序.30. 利用軟件編寫(xiě)的I2C傳輸界面程序,適用于現(xiàn)有4位機(jī)等匯編語(yǔ)言中!.31. I2C控制程序,供大家學(xué)習(xí)參考,使用時(shí)根據(jù)自己的系統(tǒng)修改..32. This designs uses a Nios II system to demonstrate how to read from the SD card. The software reads W.33. his design is the initial design when the board is powered-up. It increments a counter and displays.34. 用于多于9個(gè)串口的ce驅(qū)動(dòng)程序。時(shí)間倉(cāng)促?？梢詤⒖?35. CSD卡的dos驅(qū)動(dòng)程序源碼.36. ADT700的小程序.37. 嵌入式的小程序.38. 基于cpld的hdb3編碼器 基于cpld的hdb3編碼器.39. 基于cpld的交通燈設(shè)計(jì) ?赾pld的交通燈設(shè)計(jì).40. 用于ARM9系列的S3C2440A的bootloader,Linux平臺(tái).
標(biāo)簽： 固件
上傳時(shí)間： 2013-04-15
上傳用戶：eeworm
VIP專區(qū)-嵌入式/單片機(jī)編程源碼精選合集系列（160）資源包含以下內(nèi)容：1. i2c ipcore of altera fpga that uses ahdl lauguage..2. 嵌入式C編程與Atmel AVR 美 Richard Barnett等著 清華 周俊杰 等譯.3. 一個(gè)POWERPC的原理圖,包括ORCAD格式的原理圖等.4. 51s系列單片機(jī)入門(mén)的最佳編程器制作資料.5. 一個(gè)開(kāi)源的嵌入式flash播放器的源代碼.6. 一個(gè)用LINUX GTK開(kāi)發(fā)的嵌入式瀏覽器.7. 用C語(yǔ)言編的帶數(shù)碼管顯示的電子琴.8. 希望從事C/C++嵌入式開(kāi)發(fā)的朋友.9. 步進(jìn)電機(jī)的單片機(jī)控制.10. 小波變換及濾波 小波變換及濾波.11. 基于單片機(jī)實(shí)現(xiàn)遙控編碼器PT2262的軟件解碼.12. c_c++嵌入式系統(tǒng)編程.13. spi driver code one marve.14. 正弦波表生成工具.15. 多級(jí)抽取程序,適用于軟件無(wú)線電系統(tǒng).16. keil和Proteus聯(lián)調(diào)所必須的一個(gè)文件.17. 用比較器實(shí)現(xiàn)AD轉(zhuǎn)換.18. FLASH讀寫(xiě)操作.19. 51單片機(jī)的串行通信仿真例子.20. armok01100828.21. 主要介紹了使用MTV230芯片的開(kāi)發(fā).22. MinGW5 在線安裝程序.23. 這是本人調(diào)用small rtos51的函數(shù)來(lái)仿真寫(xiě)的基本代碼.24. s3c2440開(kāi)發(fā)板原理圖 s3c2440開(kāi)發(fā)板原理圖.25. AT89c51單片機(jī)下,液晶顯示LCD1602的c語(yǔ)言驅(qū)動(dòng)程序,原創(chuàng)代碼.26. 這是我的開(kāi)發(fā)板的原理圖.27. 51單片機(jī)SPI讀取SCA100角度值,帶溫度補(bǔ)償,精度達(dá)到0.008度..28. motorala模式對(duì)CPLD的讀寫(xiě)和譯碼.29. 關(guān)于nucleus系統(tǒng)的教程文檔.30. 單片機(jī) 嚴(yán)青新板調(diào)試程序 單片機(jī)最小系統(tǒng)及流水燈程序 更新時(shí)間：2006-12-29 執(zhí)行結(jié)果：在單片機(jī)的P1口上的8個(gè)發(fā)光二極管按流水燈順序而跑動(dòng).31. 實(shí)現(xiàn)利用8051單片機(jī)透過(guò)軟體I2C驅(qū)動(dòng)TSEM0108L感測(cè)器之程式庫(kù).32. 20060531am--Windows嵌入式開(kāi)發(fā)系列課程(1)：Windows CE系統(tǒng)定制開(kāi)發(fā)入門(mén).33. s3c2410 tesy program.34. s3c2440開(kāi)發(fā)板元件庫(kù),希望對(duì)初學(xué)者有用.35. s3c2440開(kāi)發(fā)板元件庫(kù),希望對(duì)初學(xué)者有用.36. 能夠較好地實(shí)現(xiàn)大多數(shù)車牌的識(shí)別.37. 計(jì)算機(jī)主板pcb文件,可以拿來(lái)學(xué)習(xí)一下..38. wince操作系統(tǒng)下USB設(shè)備的驅(qū)動(dòng)程序源碼.39. 一本介紹嵌入式OS原理及編程的英文書(shū)籍.40. 【cacti】Weathermap使用手冊(cè).
標(biāo)簽： 強(qiáng)激光 傳輸 控制
上傳時(shí)間： 2013-04-15
上傳用戶：eeworm
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