查询词典 circuit

Circuit system used varistor constitute the Wheatstone bridge to collect small changes in voltage, After amplification circuit amplified into A / D converter circuit, the input voltage digital signal after the conversion output AT89S52 conducted by the control and data processing and results in the LCD display.

系统电路采用压敏电阻构成惠斯登电桥来采集电压的微小变化，经过放大电路放大后送入A/D转换电路，对输入电压信号进行数字量的转换后输出，由AT89S52进行系统的控制和对数据的处理并将结果显示在液晶显示器上。

This article introduced in detail does not have the electric cable to coordinate the controller the overall design and its hardware electric circuit, the software procedure: Voltage comparator, 2 frequency multipliers, synchronized clock electric circuit, 6 7SEDLED nixietube display circuit.

本文详细介绍了无电缆协调控制器的整体设计和其硬件电路软件程序其硬件电路组要有：电压比较器2倍频器同步时钟电路6位7SEDLED数码管显示电路系统软件包括：主程序子程序实现控制程序等实验表明：该无电缆协调控制器系统可以准确的对信号灯进行监控和教正，可以在一定程度上解决混合交通流的问题

This paper also introduces the design of hardware in detailed. And introduces MCU model, the choice of detector, the choice of the wireless receiving- dispatching module , the repeater, circuit control remotely, electric circuit of the watch-dog, the design of acousto-optics alarm circuit, and gives some program design methods.

本文对各部分硬件设计作了详细的阐述，并介绍了核心芯片的选型，探测器的选择、无线收发模块的选择、中继器、遥控电路、看门狗电路、声光报警电路设计，给出了主要程序的设计方法。

The discussion covers: 1、By theoretical analysis on the measurement circuit of the piezoelectric accelerometer, a optimization design for charge amplifier is proposed which uses TL081 to replace a largenumber of discrete components. The design not only improve the integration of the circuit, but also have some extra merits, including smaller volume, lower consumption, less autoeciousness and stronger resistance to interruption. 2、Affiliated conditional circuit and filter to the devised charge amplifier, the signal is normalized and the noise ( generally, high frequency signal and DC signal) are restrained.

论文完成的主要工作如下： 1、通过对压电加速度传感器测量电路的理论研究，提出用TL081芯片取代大量的分离元件进行电荷放大器的优化设计方案，从而提高了电路的集成度，使其具有体积小、功耗低、寄生因素少和抗干扰性能强的优点。

Bachel degree above, majing in Electronics, with over 2 years related wk experience; over 1 year wk experience in EMC design of board /card products; familiar with EMC testing stards the technical requirements of EMC EMS testing items; familiar with theetical knowledge in analog circuit, digital circuit, high-frequency electronic circuit, signal system electromagnetic field.

电子类专业本科以上学历，2年以上相关工作经验，有1年以上板卡类产品EMC设计工作经验，了解EMC测试标准，熟悉EMC，EMS的各项测试项目的技术要求，熟悉模拟电路，数字电路，高频电子线路，信号与系统，电磁场的理论知识。

Digital clock is a kind of modern calculagraph which is composed of digital integrated circuit and can show decimal digital. Compared with mechanical clock, it is exact and can be see frankly. It is very popular in some public places, such as station, airport.Keywords: Multisim2001; Circuit Simulation; Digital Circuit; Answer Bell

数字钟是用数字集成电路构成的、用数码显示的一种现代计时器，与机械表比，它走时准、显示直观、无机械传动装置等特点，广泛应用于车站、码头、机场等公共场所。

This article first introduced designs the high efficiency cocurrent voltage-stabilized source's composition structure and the control principle, and on the power source main circuit, the control circuit, the protection circuit as well as the control system software's design did have analyzed in detail.

本文首先介绍了所设计的大功率直流稳压电源的组成结构和控制原理，并就电源主电路、控制电路、保护电路以及控制系统软件的设计做了详细地分析。

This article first introduced designs the high efficiency cocurrent voltage-stabilized source's composition structure and the control principle, and on the power source main circuit, the control circuit, the protection circuit as well as the control system software's design did have analyzed in detail.

但是，上述这些新型功率开关器件也存在一些弱点，如电压与电流的过载能力弱，当工作参数超过其安全范围是，非常容易损坏。因此给电路结构的设计与制造提出了新的要求，并且需要快速而有效的保护措施

The concerned research works of VFTO is investigated.A new transient circuit model to the question of the steep front and high amplitude value of VFTO is proposed based on general transient circuit model. The numeric simulation that disconnector switched off short bus has been proceeded by using above circuit model and the comparison of results with the one based on EMTP are given.

首先针对操作GIS中隔离开关所产生的快速暂态过电压上升时间短及幅值高的特点，在一般暂态电路模型的基础上提出了新的暂态电路模型，并利用该模型，对GIS中隔离开关切断短母线的等值电路进行了数值模拟，并与电磁暂态程序的计算结果进行了比较。

Time graded schemes such as over-current or distance protection schemes are examples of those providing inherent back-up protection; the faulty section is normally isolated discriminatively by the time grading, but if the appropriate relay fails or the circuit breaker fails to trip, the next relay in the grading sequence will complete its operation and trip the associated circuit breaker, thereby interrupting the fault circuit one section further back.

过流保护或距离保护可作为前一种方案的例子，通常采用分时限区别来隔离故障段，如果相应的继电器拒动或断路器拒跳，按时限下一个继电器动作跳开有关的断路器，这样就断开了故障回路的下一段。采用这种方法就获得了完整的后备保护。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。