为适应双向DC/DC功率变换的电流采样需求,一种高精度高边电流采样电路被提出。其基本思想是在功率电路的高边串入采样电阻,借助电流镜原理并引入偏置电流电路,将双向电流均转换为正向电压输出。通过理论分析与仿真结合的方法对电流镜采样原理及4种不同的偏置电流电路方案进行对比,最后通过实验数据验证了高精度高边电流采样电路的有效性。实验数据表明,该采样电路可在-25~75℃的温度工作范围内,针对-10~+10 A范围内的电流采样实现优于5%的采样精度。Current sensing plays an IMPORTANT role in controlling,monitoring or protection functions of power systems.To meet the current sensing requirement of bidirectional DC/DC converters,a high-accuracy bidirectional current sensing circuit is proposed.The proposed current sensing circuit inserts a resistor in the path of the current to be sensed,while the current mirror and biased current circuit are introduced.Therefore,the bidirectional current can be expressed by positive voltage.By theoretical analysis and simulation,the sampling theory is analyzed and four biased current circuits are compared.At last,experimental results verified the proposed method.It is demonstrated that the proposed current sensing circuit can achi...
上传时间: 2022-04-22
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随着科技的发展,人们在日常生活中使用的电器越来越多,电子设备的电磁兼容性(EMC)也越来越重要。所以,人们对电子设备的电磁兼容性的要求也越来越严格,越来越规范。而在市场竞争中,如何降低成本、减少设备体积,是各电子设备制造厂家重点研究的课题。通过对开关电源的EMI滤波电路的类别和相应的技术特点进行分析,设计出一种既能提高性能,又能降低成本的滤波电路。With the development of technology, appliances people use in their daily lives, more and more electronic devices electromagnetic compatibility ( EMC ) has become increasingly IMPORTANT. So, people electromagnetic compatibility requirements of electronic devices have become increasingly stringent, more and more standardized. The competition in the market, how to reduce costs, reduce equipment size, is the subject of the electronic equipment manufacturer focused on research. Through the technical characteristics of the respective category and the EMI filter circuit switching power supply is analyzed both designed to improve a performance of the filter circuit can reduce the cost.
上传时间: 2022-04-23
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历时四年,在好评如潮的《你好,放大器》之后,西安交通大学电气工程学院杨建国老师携模电力作《新概念模拟电路》再度归来!一样的风趣幽默,一扫模电的枯燥无趣;一样的生活化语言,深入浅出让深奥的模电简单易懂。不一样主题,更深入详细的阐述和丰富的电路案例,杨教授要将每一个技术主题讲透讲明白。新的模电经典已出,模拟的江湖从此波澜壮阔!
标签: 模拟电路
上传时间: 2022-04-28
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超声波换能器作为一种实用的检测手段,能实现声波所携带的信息和电能之间转换。它的性能优良,价格低廉,操作方便,易于调试,因此在工农业生产中发挥着重要的作用。但目前换能器驱动电路的发射频率多为40 kHz,本文针对1 MHz的超声波换能器电路进行了设计,主要介绍了它的发射驱动电路和接收驱动电路的设计方案,并对它们的功能进行了详细地说明。最后搭建实验平台,并对电路的输入、输出模块进行了测试。实验结果表明,换能器电路运行良好,可以为超声波高精度测量领域的应用提供参考。As a practical means of detection, ultrasonic transducer can realize the conversion between theinformation carried by sound wave and electric energy.It has the advantages of excellent performance,low cost, convenient operation and debugging, so plays an IMPORTANT role in industrial and agriculturalproduction.However, the transmitting frequency of the driving circuit for most transducer is 40 kHz.Thecircuit of 1 MHz ultrasonic transducer is designed In this paper. It mainly introduces the emissive drivingcircuit and the receiving circuit design and the detailed function of them. Finally, the experimentalplatform is built, and the circuit of input and output were tested. Experiments show that the transducer' s...
上传时间: 2022-04-28
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This manual documents the Microcontroller profile of version 7 of the ARM® Architecture, the ARMv7-M architecture profile. For short definitions of all the ARMv7 profiles see About the ARMv7 architecture, and architecture profiles on page A1-20.ARMv7 is documented as a set of architecture profiles. The profiles are defined as follows: ARMv7-A The application profile for systems supporting the ARM and Thumb instruction sets, and requiring virtual address support in the memory management model. ARMv7-R The realtime profile for systems supporting the ARM and Thumb instruction sets, and requiring physical address only support in the memory management model ARMv7-M The microcontroller profile for systems supporting only the Thumb instruction set, and where overall size and deterministic operation for an implementation are more IMPORTANT than absolute performance. While profiles were formally introduced with the ARMv7 development, the A-profile and R-profile have implicitly existed in earlier versions, associated with the Virtual Memory System Architecture (VMSA) and Protected Memory System Architecture (PMSA) respectively.
标签: arm
上传时间: 2022-06-02
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sscom是一款主要是用于蓝牙的调试的专业串口调试软件。用户可以通过该多串口调试工具来调试蓝牙,检测串口的状况。该软件可以及时显示存在的串口号,如果用户增加了usb转串口设备,串口号就会出现在列表内。能够支持110-256000bps波特率,设置数据位(5678),校验(odd,even,mark,space)、停止位(1,1.5,2),并发送任意的字符串。对于dtr,rts信号线也能自由控制输出状态。功能介绍 1.显示流畅,不容易丢数据.中文显示无乱码. 2.USB串口误拔不易死机,大部分型号的USB芯片插回能自动恢复(pl2303除外). 3.通讯方面支持串口和网卡TCP/IP,UDP通讯. 4.波特率支持自定义,最 5.可以实现“帧头+数据+校验+帧尾”的 6.支持字符串和十六进制方式显示,和加时间戳分数据包显示,支持数据波形(示波器)显示. 7.支持字符串和十进制方式发送,支持预定义99组数据串发送.支持发送数据包加校验.支持转义符号输入. 8.支持接收数据直接保存到文件,也可保存窗口数据和原始接收数据. 9.支持终端仿真,STM32的ISP程序下载功能. 10.窗口大小位置,接收窗口的字体颜色背景色均可保存.
上传时间: 2022-06-12
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Mathematical modeling has become an IMPORTANT part of the research and devclopment work in engineering and scicnce. Retaining a competitive edge requiresa fast path between ideas and prototypes, and in this regard mathematical modeling and simulation provide a valuable shortcut for understanding both qualitative and quantitative aspects of scientific and engineering design. To assist you in gaining this edge, COMSOL Multiphysics offers state-of-the art performance, being built from the ground up with a Java3D interface and C/C++ solvers.The Acoustics Module is an optional package that extends the COMSOL Multiphysicsmodcling cnvironment with customized user interfaces and functionality optimizcd for the analysis of acoustics. Like all modules in the COMSOL family, it provides a brary of prewritten ready-to-run models that make it quicker and casier to analyze disciplinc-specific problcms.
上传时间: 2022-06-19
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2011年,Realtek(瑞昱)开发出了业界公认的低功耗,高性能的USB3.0 Hub 主控,RTS5401-GR。它超小的体积(QFN76)和规范化的设计(USB IF认证,BC1.2和支持苹果设备快充),赢得了行内一致认可。如今,打磨再打磨,瑞昱在原有的优势基础上,又新推一款更具性价比的USB3.0 Hub 主控IC,RTS5411-GR。此款IC的推出目的就是优化功耗,提高性能,降低客户Bom成本。那么,此款主控到底有何改善和更新呢? 众所周知,目前世面上的Hub 主控,诸如创唯(GL3520) 威盛(VL812) 等等,都需要外挂一颗Flash,把配置文件(Bin文件)烧录其中,才能控制各个下行端口的设置。 而且,还需要一颗降压IC(5.5~3V to 1.2V)。 如此才能是整块板子正常工作,达到设计要求。 而现在,RTS5411-GR内置Efuse功能,可把Bin程序烧录到IC内部,这样就省去外挂SPI FLASH,使客户再次Cost Down. 另外,该IC已内置降压IC(5.5~3V to 1.2V) 因此,在整个Bom设计中,无需再加一颗降压IC。 上述两点,可以让整个Bom节省大约RMB1.00的成本,这使得客户的Hub产品更具价格优势!
上传时间: 2022-06-22
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RTS5411 USB3.0 HUB Controller v1.22011年,Realtek(瑞昱)开发出了业界公认的低功耗,高性能的USB3.0 Hub 主控,RTS5401-GR。它超小的体积(QFN76)和规范化的设计(USB IF认证,BC1.2和支持苹果设备快充),赢得了行内一致认可。如今,打磨再打磨,瑞昱在原有的优势基础上,又新推一款更具性价比的USB3.0 Hub 主控IC,RTS5411-GR。此款IC的推出目的就是优化功耗,提高性能,降低客户Bom成本。那么,此款主控到底有何改善和更新呢? 众所周知,目前世面上的Hub 主控,诸如创唯(GL3520) 威盛(VL812) 等等,都需要外挂一颗Flash,把配置文件(Bin文件)烧录其中,才能控制各个下行端口的设置。 而且,还需要一颗降压IC(5.5~3V to 1.2V)。 如此才能是整块板子正常工作,达到设计要求。 而现在,RTS5411-GR内置Efuse功能,可把Bin程序烧录到IC内部,这样就省去外挂SPI FLASH,使客户再次Cost Down. 另外,该IC已内置降压IC(5.5~3V to 1.2V) 因此,在整个Bom设计中,无需再加一颗降压IC。 上述两点,可以让整个Bom节省大约RMB1.00的成本,这使得客户的Hub产品更具价格优势!
上传时间: 2022-06-22
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STM32CubeMX是一个图形化的软件配置工具,使用图形向导可以生成STM32初始化代码工程。STM32CubeMX这个工具是ST目前重点打造的工具,目的就是为了方便开发者,节约时间,提高开发效率STM32CubeMX特性:1.直观的选择 STM32 微控制器(MCU)和微处理器(MPU)。2.丰富易用的图形化界面:3.生成初始化代码工程,包含:EWARM、 MDK-ARM、 TureSTUDIO、 SW4STM32等。4.针对部分MPU生成Linux设备树。5.可独立运行在Windows、Linux和macOS上使用,或作为 Eclipse 插件使用。
标签: stm32cube
上传时间: 2022-06-29
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