文章提出了一种基于AT89S51单片机的智能家居系统的设计,该系统具有室内煤气以及烟雾的检测、家庭室内防盗等功能。文章详细分析了系统的总体设计,详尽分析并设计了煤气传感器模块、烟雾传感器模块、人体红外感应传感器模块、报警模块等各硬件部分,并利用PROTUES软件进行了系统仿真。仿真结果证明:系统具有成本低、效率高、操作方便等优点,达到了预期设计的效果。This paper presents the design of an intelligent home system based on AT89S51 microcontroller.The system has the functions of detecting indoor gas and smoke,guarding against theft in the home,and so on.The overall design of the system is analyzed in detail.The gas sensor module,smoke sensor module,human infrared sensor module,alarm module and other hardware parts are analyzed and designed in detail,and the system simulation is carried out using PROTUES software.The simulation results show that the system has the advantages of low cost,high efficiency,convenient operation and so on,and achieves the expected design effect.
上传时间： 2022-03-28
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为设计高效率、低损耗的PFC电路,本文基于UCC28019进行电路设计。以UCC28019输出的PWM波形来控制Boost升压斩波为核心电路,使电路中的电容交替地充放电、电感交替的储存和释放能量,最后实现在输入AC20V~24V电压情况下稳定输出DC38V。测试结果表明,系统实现效率为95%左右,电压调整率小于1%,电源功率因数0.99。交流输入电压为19.0-25.8 V时,输出直流电压稳定性较好,电感无明显啸叫且纹波小,具有一定的带负载能力和实用性。In order to design the PFC circuit with high efficiency and low loss,this paper designs the circuit based on UCC28019.The PWM waveform output by UCC28019 is used to control boost chopper as the core circuit,which alternately charges and discharges capacitors,stores and releases energy by inductors,and finally achieves stable output of DC38 V under the input voltage of AC20 V~24 V.The test results show that the system achieves about 95% efficiency,the voltage adjustment rate is less than 1%,the power factor is 0.99,and the AC input voltage is 19.0-25.8 V.The output DC voltage stability is good,the inductance has no obvious whistle and the ripple is small,so it has certain load capacity and practicability.
上传时间： 2022-04-03
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本文首次设计并验证了基于macom三合一芯片设计的光模块电路,该电路旨在提供一种满足SFF-8472中规定的数字诊断功能的低成本SFP+模块。电路采用激光器驱动、限幅放大器、控制器以及时钟恢复单元集成的单芯片,在保证高精度数字诊断功能基础上,实现了低成本高可靠的特点。该电路在光接收接口组件与激光器驱动和限幅放大器单元的限幅放大器部分之间接入滤波器来提高模块的灵敏度及信号质量。在控制器单元的数字电位器的引脚上采用外加电阻的方式避免出现上电不发光的故障问题。该研究结果为下一代SFP-DD光模块设计与开发工作,奠定了一定的理论与实践基础。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.
上传时间： 2022-04-03
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本文设计了一种磁致伸缩位移传感器,介绍了该磁致伸缩位移传感器的测量原理,通过结构优化设计提高了仪器的性能,详述了硬件电路设计及实现方法,完成了软件设计,实现了高压充电、问询脉冲加载、时间测量及滤波等功能,并通过实验对其性能进行了验证。所研制的磁致伸缩位移传感器具有测量精度高、长期稳定性好等特点,满足了大量程、高精度、恶劣环境等测量的要求。A kind of sensor based on magnetostrictive principle is designed.The measuring principle of the magnetostrictive displacement sensor is introduced,the performance of the instrument is improved by the structural optimization design,and introduced the hardware circuit design and the realization method,completed the software design,realized the functions of the high voltage charging,inquiries pulse loading,time measurement and filtering,and its performance is verified through the experiment.The magnetostrictive displacement sensor has the characteristics of high measuring precision.The sensor meets the requirements of large range,high precision,poor environment and so on.
标签： 位移传感器
上传时间： 2022-04-06
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高通蓝牙芯片QCC5144 详细规格手册datasheet （共99页）含各个接口说明，应用原理图等信息。 QualcommTrueWireless™ stereo earbuds (无线双耳） Features（特点） ■ Qualifiedto Bluetooth v5.2 specification （蓝牙协议标准5.2） ■ 120 MHz Qualcomm ® Kalimba ™ audio DSP （120MHz 的音频DSP处理器） ■ 32 MHz/80MHz Developer Processor for applications ■ Firmware Processor for system ■ Flexible QSPI flash programmable platform （可编程的QSPI外挂存储器） ■ High-performance 24‑bit audio interface （高性能的24位音频接口） ■ Digital and analog microphone interfaces （含 数字 及模拟 MIC接口） ■ Flexible PIO controller and LED pins with PWM support ■ Serial interfaces: UART, Bit Serializer (I²C/SPI), USB 2.0 （支持串口，I2C， SPI，USB 接口） ■ Advanced audio algorithms （高级的音频算法） ■ ActiveNoise Cancellation: （支持ANC 主动降噪功能） Hybrid, Feedforward, and Feedback modes, using Digital or Analog Mics, enabled using license keys available from Qualcomm® ■ Qualcomm ® aptX ™ and aptX HD Audio （支持独特的aptx 功能）
上传时间： 2022-04-07
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高通蓝牙芯片QCC3040 详细规格手册datasheet （共96页）QualcommTrueWireless™ stereo earbuds (无线双耳）Features（特点）■ Qualifiedto Bluetooth v5.2 specification （蓝牙协议标准5.2）■ 120 MHz Qualcomm ® Kalimba ™ audio DSP （120MHz 的音频DSP处理器）■ 32 MHz Developer Processor for applications （32MH的 应用处理器）■ Firmware Processor for system■ Flexible QSPI flash programmable platform （可编程的QSPI外挂存储器）■ High-performance 24‑bit audio interface （高性能的24位音频接口）■ Digital and analog microphone interfaces （含 数字 及模拟 MIC接口）■ Flexible PIO controller and LED pins with PWM support■ Serial interfaces: UART, Bit Serializer (I²C/SPI), USB 2.0 （支持串口，I2C， SPI，USB 接口）■ Advanced audio algorithms （高级的音频算法）■ ActiveNoise Cancellation: （支持ANC 主动降噪功能）Hybrid, Feedforward, and Feedback modes, using Digitalor Analog Mics, enabled using license keys available from Qualcomm®■ Qualcomm ® aptX ™ and aptX HD Audio （支持独特的aptx 功能）
上传时间： 2022-04-09
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随着电磁阀在工业和日常应用的增多,其功耗越来越被人们所重视。通过对电磁阀驱动电路的研究,设计一套电磁阀节能驱动电路。不仅提高了电磁阀的响应时间,更重要的是降低了功耗,使电磁阀由工作在大电流状态下,变成大电流启动小电流维持的工作状态。减少了由电流过大引起的电磁阀线圈过热,增加了电磁阀的安全性。The power consumption of an electromagnetic valve is drawing increasingly more attentiori as it is widely used in industrial production and daily life. In this study, an energy - saving driving circuit of electromagnetic valves was designed. It can make an electromagnetic valve to start with a high current while work with a low current; thereby the power consumption can be reduced. Besides, it can shorten the response time of an electromagnetic valve and improve the security of the valve.
上传时间： 2022-04-16
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HC-SR501 High Sensitivity Human Infrared Sensor Module Pyroelectric PCB.doc人体红外感应原理图
标签： 红外感应
上传时间： 2022-04-18
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Springer模拟电路设计丛书，《清华版双语教学用书·模拟集成电路设计精粹》作者首先对MOST和BJT两种器件模型进行了分析和比较，然后以此为两条线索，分别介绍了相应的基本单元电路和各类放大器的详细分析，随后的章节分别研究噪声、失真、滤波器、ADC／DAC和振荡器电路，每一章都结合MOST和BJT两种类型电路进行分析比较。《清华版双语教学用书·模拟集成电路设计精粹》一方面侧重于基础知识，对模拟和混合信号集成电路中的许多重要概念以直观形象的语言进行了描述。另一方面又侧重介绍与现代集成电路工艺相关的最新电路的研究方向和热点。Next-Generation ADCs, High-Performance Power Management, and Technology Considerations for Advanced Integrated Circuits
上传时间： 2022-04-19
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HDMI-Definition Multimedia Interface Specification Version 2.0This document constitutes the Version 2.0 specification for the High-Definition Multimedia Interface (HDMI Specification Version 2.0). This Specification incorporates HDMI Specification Version 1.4b by reference and defines additional and improved functionality. Mechanical, behavioral, and protocol requirements necessary for compliance are described for Sources, Sinks, Repeaters, and Cables.
标签： hdmi
上传时间： 2022-04-22
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