查询词典 circuit

A method for decreasing energy consumption includes obtaining relevant configuration parameter from system master control unit by user circuit management unit when device is started up and dynamically controlling operation mode of user circuit by user circuit management unit according to relevant configuration parameter as per preset configuration requirement when cyclic-scanning of user circuit is executed.

本发明提供了一种通过动态控制用户电路的工作模式来降低能耗的方法和系统，其中，该方法可以包括以下步骤：步骤一、当设备启动或相关配置参数发生更改时，用户电路管理单元从系统主控单元获取相关配置参数；以及步骤二、当执行用户电路的周期扫描时，用户电路管理单元按照预定配置要求，根据相关配置参数来动态控制用户电路的工作模式。

Small signal equivalent circuit analysis shows that the small signal output resistance in the accurate proportional current sampling mode circuit is much larger than that in a traditional proportional current sampling mode circuit, and circuit stability could be assured.

通过电路的小信号模型分析，得到精密比例采样模式的小信号等效输出电阻远大于传统比例采样模式，同时保证了系统的稳定性。

However, the CMOS image sensors can provide stronger anti-radiation capacity than CCD as well as Single Chip Integrating with image sensors array, drive and control circuit, signal processing circuit, A/D conversion circuit and Completely Digital Interface Circuit. The CMOS image sensors also possess high quantum efficiency, wide spectral response, good response uniformity, low supply voltage and low request of clock. At the same time, the small bulk, high reliability, low power consumption and low cost are the prominent advantages of the CMOS image sensors too, thus CMOS image sensor has more exploiture foreground in X-ray real-time radioscopy imaging system.

由于CMOS 图像传感器比CCD 具有更强的抗辐射能力，还具有将图像传感器阵列、驱动和控制电路、信号处理电路、模数转换电路、全数字接口电路等实现单片集成以及量子效率高、光谱响应宽、响应均匀性好、工作电压低、对时钟脉冲要求低、体积小、重量轻、功耗低、高可靠、低成本等优点，因此在X 射线实时检测中更具有开发前景。

This literary grace uses to divide a piece modes, proceeding the analysis to the hardware design of whole system, and System diagram, dial up circuit , hang up circuit , ring detecting circuit, voice unit circuit are provided .The system makes use of serial communication .

本文采用分块的模式，对整个系统的硬件设计进行分析，分别给出了系统总体框图、振铃检测电路、摘/挂机控制电路、DTMF信号转换电路、语音单元的电路，并对相应电路设计进行相关的阐述。

By the research of the RLC series circuit, RLC Parallel circuit, and the starat of Fourier Series, get the further understanding and grasp the characteristics of the resonant of RLC circuit. Even more, on the basis of the RLC series resonance, the other circuit structures selected frequency wave frequency analysis of the election.

本实验通过对RLC串联电路、并联电路及方波的傅立叶级数展开的实验现象的测量及研究，进一步了解和掌握RLC谐振电路的特点，并在RLC串联谐振的基础上，搭建选频电路对方波进行选频分析。

This circuit made up by the launch circuit, data encoding, superheterodyne receivers, data decryption, data processing, warning circuit, output display, and power supply circuit warning.

其电路主要是由发射电路、数据编码、超外差接收器、数据解码、数据处理、报警电路、输出显示、断电报警和电源电路组成。

The main content of this dissertation includes: 1. Research on the theory of ultrasonic power supply, introduce its development process. On the basis of these, fix on the scheme of medical ultrasonic low-power supply. 2. According to the principle of modularized design, divide medical ultrasonic low-power supply into four parts. They are power amplify circuit, power control circuit, frequency automatic tracking circuit and matching circuit. Separately research on their theories and design their circuits and necessary programs, especially, effectively resolve the problem tracking the supersonic vibration system with a narrow syntony frequency bandwidth and a high swing. 3. The matching experiments gain good result, and prove that medical ultrasonic low-power supply is entirely up to the mustard on intellectualization, wide band of working frequency, steady output and high efficiency.

本文工作的主要内容包括： 1、研究了超声功率电源的原理，并回顾了它的发展过程，在此基础之上确定本文医用小功率超声电源的设计方案； 2、按照模块化的设计原则，将医用小功率超声电源的设计分解为功率放大电路、功率控制电路、频率自动跟踪电路和匹配电路等四个部分，分别研究了各部分的原理，在此基础之上进行了具体的电路设计和程序设计，尤其是有效地解决了对谐振频率带宽窄振幅高的超声振动系统的频率跟踪问题； 3、通过与超声振动系统的各项配合实验，取得了很好的实验结果，验证了医用小功率超声电源完全满足智能化、工作频带宽、输出功率稳定、输出效率高的设计要求。

The design for impedance converting circuit of input current,transistor amplifying circuit and converting circuit of output current is presented.The telegrapher equations are adopted to determine the impedance of transmission-line transformer,which is used to convert circuit impedance between signal source and transistor.

讨论了放大器输入回路阻抗变换电路、晶体管放大电路以及输出回路阻抗变换电路的设计思想，运用电报方程从理论上推导出用于信号源和晶体管之间阻抗变换的传输线变压器输入输出阻抗计算公式，由此设计出模拟信号处理电路中非常重要的AB类高功率放大器。

The paper reviews the phylogeny of the LCD, describes the recent development situation of LCD-TV and several authority investigation institution do its prospective forcast. The research of the switching power supply, future development t rend is given in the paper. Outlines of LCD-TV technology, introduce the sort of topological structure. The BUCK type converter topological structure and the systematical basictheory were put emphasis on; the PFC, the reasons of power factor simply and the core of L6562 were analyzed, emphatically on the application circuit of this core, and account the design parameter of the application circuit. The sort and control mode of PWM, the control core of UC3846 and OB2262 were explained, the application circuit of this core were specific analyzed, practice picture in the real circuit uses oscilloscope were educed and contrastive analysis in this research.

本文回顾了LCD的发展史，介绍了LCD-TV发展的近况和一些权威调查机构对其未来的预测；对开关电源的研究概况和它的发展趋势作了总结；总体介绍了LCD-TV电源的结构及工作原理、拓扑结构的分类，着重研究了BUCK型变换器的拓扑结构及工作原理；对PFC作了综述，研究了功率因数降低的原因，重点介绍了L6562芯片，对此芯片的应用电路作了具体分析，并对芯片外围的设计参数作了分析研究；研究了PWM的分类和控制模式，对控制芯片UC3846和OB2262分别进行了重点说明，详细研究了基于UC3846的PWM设计，用示波器对其实际电路进行了抓图，并对比分析实际波形。

Buck and Boost topology switching power conversion circuits as the core of this system, ultra low power MSP430F1222 microcontroller-based controller, microcontroller produced by the PWM pulse width modulation signals, respectively, two-way control switch voltage conversion circuit the turn-on and turn-off in order to achieve the above two kinds of topology switching power conversion circuit, and then to draw power from the flow of electrical energy has been filled into the rechargeable battery, and using microcontroller A / D input voltage implementation of the monitoring, according to the input voltage switching buck - circuit at a lower cost to achieve a highly efficient energy transfer, and the circuit is simple, the parameter to determine easy, self-low power consumption,to achieve full-featured.

本系统以Buck降压和Boost升压拓扑结构开关电源变换电路为核心，以超低功耗单片机MSP430F1222为主控器，由单片机产生PWM脉宽调制信号，分别控制两路电压变换电路中开关管的导通与关断从而实现以上两种拓扑结构开关电源变换电路，进而从一直流电源中吸取电能充入可充电电池，并利用单片机A/D对输入电压实施监测，根据输入电压切换升降压电路，以较低的成本实现了高效率的电能转移，并且电路简单、参数确定容易，自身功耗低，实现功能完整。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了