It all started rather innocuously. I walked into Dr GT Murthy’s office one fine day, andchanged my life. “Doc” was then the General Manager, Central R&D, of a very largeelectrical company headquartered in Bombay. In his new state-of-the-art electronics center,he had hand-picked some of India’s best engineers (over a hundred already) ever assembledunder one roof. Luckily, he too was originally a Physicist, and that certainly helped me gainsome empathy. Nowadays he is in retirement, but I will always remember him as athoroughly fair, honest and facts-oriented person, who led by example. There were severalthings I absorbed from him that are very much part of my basic engineering persona today.You can certainly look upon this book as an extension of what Doc started many years agoin India … because that’s what it really is! I certainly wouldn’t be here today if I hadn’t metDoc. And in fact, several of the brash, high-flying managers I’ve met in recent years,desperately need some sort of crash course in technology and human values from Doc!
標(biāo)簽： 開關(guān)電源
上傳時間： 2021-11-23
上傳用戶：
電子書-RTL Design Style Guide for Verilog HDL540頁A FF having a fixed input value is generated from the description in the upper portion of Example 2-21. In this case, ’0’ is output when the reset signal is asynchronously input, and ’1’ is output when the START signal rises. Therefore, the FF data input is fixed at the power supply, since the typical value ’1’ is output following the rise of the START signal. When FF input values are fixed, the fixed inputs become untestable and the fault detection rate drops. When implementing a scan design and converting to a scan FF, the scan may not be executed properl not be executed properly, so such descriptions , so such descriptions are not are not recommended. recommended.[1] As in the lower part of Example 2-21, be sure to construct a synchronous type of circuit and ensure that the clock signal is input to the clock pin of the FF. Other than the sample shown in Example 2-21, there are situations where for certain control signals, those that had been switched due to the conditions of an external input will no longer need to be switched, leaving only a FF. If logic exists in a lower level and a fixed value is input from an upper level, the input value of the FF may also end up being fixed as the result of optimization with logic synthesis tools. In a situation like this, while perhaps difficult to completely eliminate, the problem should be avoided as much as possible.
標(biāo)簽： RTL verilog hdl
上傳時間： 2022-03-21
上傳用戶：canderile
配電網(wǎng)中,各種配電終端的電流、電壓、有功功率及無功功率等模擬量的采集是配電網(wǎng)自動化的重要環(huán)節(jié)。這些模擬量的采集也是各種儀器和家用電器的必要功能。因此,設(shè)計(jì)了基于嵌入式STM32F103單片機(jī)的交流電壓、交流電流及有功功率的采集系統(tǒng),通過電壓互感器TV1005M和電流互感器TA1005M分別檢測交流電壓和交流電流值;屏幕或者手機(jī)APP和WiFi模塊互聯(lián)后,可以實(shí)時顯示交流電壓、交流電流、功率及電量值;通過設(shè)定閾值功率,可以實(shí)現(xiàn)對電流的監(jiān)控和對電路的保護(hù)。In the distribution network,the collection of analog,such as current,voltage,active power,and reactive power at various distribution terminals is a very important part of distribution network automation. These analog acquisitions are also for various instruments and household appliances. Very important technology. Therefore,an AC voltage,AC current and active power acquisition system based on embedded STM32 F103 machine is designed,and AC voltage and AC current values are detected by voltage transformer TV1005 M and current Transformer TA1005 M respectively;After the screen or mobile phone APP and WiFi modules are interconnected,AC voltage,AC current,power,and power values can be displayed in real time;By setting the threshold power,the current can be monitored and the circuit can be protected.
標(biāo)簽： stm32f103 單片機(jī) 電流電壓采集
上傳時間： 2022-03-27
上傳用戶：shjgzh
設(shè)計(jì)了自動控制系統(tǒng)綜合實(shí)驗(yàn)案例“基于LabVIEW和單片機(jī)的溫度控制系統(tǒng)設(shè)計(jì)”。實(shí)驗(yàn)系統(tǒng)硬件部分由單片機(jī)、溫度傳感器、D/A轉(zhuǎn)換模塊、調(diào)壓模塊和電烤箱組成,設(shè)計(jì)了單片機(jī)與各個模塊之間的接口電路。軟件部分采用LabVIEW軟件實(shí)現(xiàn)控制算法,并設(shè)計(jì)監(jiān)控界面實(shí)現(xiàn)參數(shù)設(shè)定、溫度數(shù)據(jù)實(shí)時監(jiān)控等功能。設(shè)計(jì)了單片機(jī)與LabVIEW軟件之間的串口通信程序,實(shí)現(xiàn)了輸入、輸出數(shù)據(jù)的傳輸。通過綜合實(shí)驗(yàn)系統(tǒng)設(shè)計(jì),使學(xué)生得到控制系統(tǒng)設(shè)計(jì)和實(shí)驗(yàn)調(diào)試等綜合能力的訓(xùn)練。A comprehensive experimental case of the automatic control system is presented,which is the design of the temperature control system based on LabVIEW and SCM.The hardware part of the experimental system is composed of the SCM,temperature sensor,D/A conversion module,voltage regulating module and electric oven.The interface circuit between the SCM and each module is designed.In the software part,LabVIEW software is used to realize the control algorithm,and the monitoring interface is designed to realize the functions of parameter setting,temperature data real-time monitoring,etc.The serial communication program between the SCM and LabVIEW software is designed to realize the transmission of input and output data.Through the design of this comprehensive experimental system,students can get the comprehensive ability training for the control system design,experiment debugging,etc.
標(biāo)簽： labview 單片機(jī) 自動控制系統(tǒng)
上傳時間： 2022-03-27
上傳用戶：qdxqdxqdxqdx
多功能智能遙控窗簾系統(tǒng)廣泛地應(yīng)用于家居、辦公室等場合,同時也是智能家居的一部分。該設(shè)計(jì)主要利用STC89C52單片機(jī)核心電路、光敏電阻電路、步進(jìn)電機(jī)電路、溫濕度傳感器、紅外線控制電路、AD轉(zhuǎn)換電路、LCD1602液晶顯示屏等模塊完成精確控制窗簾的開和關(guān)。multi-functional intelligent remote control curtain system is widely used in home,office and other occasions,and is also part of intelligent home.The design mainly uses STC89 C52 single-chip core circuit,photosensitive resistor circuit,stepping motor circuit,temperature and humidity sensor,infrared control circuit,AD conversion circuit,LCD1602 LCD display and other modules to achieve accurate control of the curtain opening and closing.
上傳時間： 2022-03-28
上傳用戶：
無線充電Qi協(xié)議，版本：1.2.4，全冊：part 1、2、3&4；全冊齊全。
上傳時間： 2022-04-01
上傳用戶：ttalli
電學(xué)中的測量技術(shù)涉及范圍非常廣,電流測量在電學(xué)計(jì)量中占有非常重要的位置。如何精確地進(jìn)行電流測量是精密測量的一大難題。傳統(tǒng)的電流檢測電路多采用運(yùn)算放大芯片與片外電流檢測電路相結(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電路的檢測。本文把所有電路部分都集成在一塊芯片上,包括檢測電阻,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,使電路更好的集成化。前置電路使用二級共源共柵結(jié)構(gòu)的運(yùn)算放大器,減小溝道長度調(diào)制效應(yīng)造成的電流誤差。10位SAR ADC中采用電容驅(qū)動能力強(qiáng)的傳輸門保證了模數(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量的問題。本設(shè)計(jì)可以作為嵌入芯片內(nèi)的一小部分而檢測芯片中的微小電流1mA~100mA,工作電壓在1.8v左右,電流檢測精度預(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 電路 運(yùn)算放大器 adc
上傳時間： 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、限幅放大器、控制器以及時鐘恢復(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)動和限幅放大器單元的限幅放大器部分之間接入濾波器來提高模塊的靈敏度及信號質(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)光的故障問題。該研究結(jié)果為下一代SFP-DD光模塊設(shè)計(jì)與開發(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.
上傳時間： 2022-04-03
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,對培養(yǎng)學(xué)生的動手能力,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,無法統(tǒng)一問題,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,NI Eiviss II作為實(shí)物電路實(shí)驗(yàn)硬件平臺,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)。同時運(yùn)用LabVIEW開發(fā)出實(shí)驗(yàn)過程人機(jī)交互操作接口界面,使用過程中效果良好。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.
上傳時間： 2022-04-05
上傳用戶：
INTERNATIONAL STANDARD NORME INTERNATIONALEPart 4-2: Testing and measurement techniques – Electrostatic discharge immunity test.About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might have been published.
標(biāo)簽： IEC
上傳時間： 2022-04-19
上傳用戶：fliang
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