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
上传用户：
The GL823K integrates a high speed 8051 microprocessor and a high efficiency hardware engine for the best data transfer performance between USB and flash card interfaces. Its pin assignment design fits to card sockets to provide easier PCB layout. Inside the chip, it integrates 5V to 3.3V regulator, 3.3V to 1.8V regulator and power MOSFETs and it enables the function of on-chip clock source (OCCS) which means no external 12MHz XTAL is needed and that effectively reduces the total BOM cost.
上传时间： 2022-04-27
上传用户：qdxqdxqdxqdx
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
上传用户：
基于TMS320F28335的超声波流量计硬件原理图+软件源码本文以TMS320F28335 处理器为核心，设计一种用于管道流量测量的超声波流量计。系统硬件由核心板，超声波发射和接收电路，切换电路，超声换能器，基于ADS805 的高速信号采集电路，人机交互以及电源等模块构成。采用时差法进行管道流量测量，时差测量采用SCOT 加权的广义互相关时延估计算法。本论文设计的超声波流量计具有测量速度快、准确性好、成本低等优点。关键字：C2000，超声波，流量，广义互相关算法AbstractA kind of ultrasonic flowmeter using for the pipe flow measurement is designed based onTMS320F28335 in this paper. The system hardware consists of the following parts: the core board,ultrasonic signal transmitter and receiver circuits, switch circuit, ultrasonic transducer, signalacquisition circuit based on ADS805, human-computer interaction module and power supplymodule, etc. The system use the method of time difference for pipeline flow measurement and thetime difference is calculated by the time-delay algorithm of SCOT weighted generalizedcross-correlation. The ultrasonic flowmeter has the features of high testing speed, high precisionand low cost, etc.Keywords: C2000,Ultrasonic, Flow, Generalized Cross-Correlation Algorithm
标签： tms320f28335 超声波流量计
上传时间： 2022-05-06
上传用户：
CH7525 is a low-cost, low-power semiconductor device that translates the DisplayPort signal to HDMI/DVI. This innovative DisplayPort receiver with an integrated HDMI Transmitter is specially designed to target the notebook/ultrabook, tablet device and PC market segments. Through the CH7525’s advanced decoding / encoding algorithm, the input DisplayPort high-speed serialized multimedia data can be seamlessly converted to HDMI/DVI output.
上传时间： 2022-06-02
上传用户：
RTL9047A 为车用乙太网single chip 交换机方案,如下图port0~port3 总共提供4ports 100BASE-T1,不用外挂PHY可节省cost 及PCB空间;port4为 selection port可选择设定100BASE-T1或SGMII,其SGMII个外接CPU或对接相同型号switch做cascade扩充;port5为 selection port可选择设定传统100base-TX FE PHY, SGMII或 RGMII/MII/RMII,其100base-TX 界面作为车载Diagnostic界面;port6为RGMII/MII/RMII 界面,可用来外接CPU或扩充网路界面等应用。
上传时间： 2022-06-07
上传用户：
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
上传用户：
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
上传用户：
German universities and scientists have repeatedly set the intermational standard in drive technology. Identification and active compensation of natural frequencies in oscillatory mechanics, status controls with monitoring structures incorporating acceleration sensors, adaptive compensation of measurement system deficiencies, self-adjusting detent torque compensation… everything invented with only a single aim in mind: to continue improv-ing the motion control, dynamics, precision and processing speed of your machines. For the industrial applicabability of this technology scientific publications in proceedings and laboratory test rigs are not enough. These features consequenty need to be converted into cost-efficient and easily manageable products. That 's exactly what we have done.So in future, if you should need more than today ' smarket can offer you, now everything isgoing to be alright. With our new high-performance ServoOne drive series you will experi-ence
标签： servoone
上传时间： 2022-06-24
上传用户：kingwide
摘要：本系统以ICL8038集成块为核心器件，制作一种函数信号发生器，制作成本较低。适合学生学习电子技术测量使用。ICL8038是一种具有多种波形输出的精密振荡集成电路，只需要个别的外部元件就能产生从0.001Hz~30KlHz的低失真正弦波、三角波、矩形波等脉冲信号。输出波形的频率和占空比还可以由电流或电阻控制。另外由于该芯片具有调制信号输入端，所以可以用来对低频信号进行频率调制。关键词：函数信号发生器频率调制Abstract：The system ICL8038 integrated block as the core device，producing a kind of function signal generator，producing low cost.Suitable for students to learn the use of electronic technology measurement.ICL8038 is a kind of multi-precision oscillator waveform output integrated circuits，a separate external components only need to be able to generate from the 0.001Hz ~30KHz low-distortion sine wave，triangle wave，square wave pulse signal，etc..Output waveform of the frequency and duty cycle can also be controlled by a currentor resistance.In addition，as the chip has a modulated signal input terminal，it can be used to low-frequency signal is frequency modulation.
上传时间： 2022-07-04
上传用户：zhanglei193
