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Comparing with traditional Boost PFC circuit,bridgeless Boost PFC circuit can improve efficiency and has advantage in medium and high power applications.

与传统Boost PFC电路相比，无桥Boost PFC电路能提高整机效率，特别适用于中大功率电路中。

The main circuit carries on the basic function of the digital electronic calculagraph and the expanded circuit carries on the expanded function of it.

论文 字数：5050 页数：16）摘要：本系统由石英晶体振荡器、分频器、计数器、译码器、LED显示器和校分电路组成，采用了中小规模集成芯片。

Based on introduction of the development for camera module used in mobile, the framework of SMIA was described, including its functionality, structure and electrical interface, emphatically on the compact camera port2.0 (CCP2.0) and the cameral control interface.Major circuit was implemented in design, using 0.18 um technology of smic. The transmitter can work at 650 MHz steadily,and digital circuit contains about 3 k gates.

在介绍了手机照相模块发展的基础上，描述了标准移动图像处理体系结构的总体架构，包括照相模块的功能、结构设计、电气特性等，尤其对密集型照相端口（CCP2.0）和照相控制端口作了详细的阐述，并实现了具体的电路设计，采用smic 0.18 um工艺，数据传输电路可以稳定地工作在650 MHz，数字电路部分约为3 k门。

for carrying out a small physical volume and high reliability of the motor driving and control,by using hip4081 chip and aln hybrid integrated technology,a hybrid integrated technology h bridge circuit based on hip4081 is designed to control bidirectional circumrotation and speed regulation of the motor.by practical application,the bidirectional circumrotation/speed adjustment of motor are realized safely and reliably.the products has a small physical volume,fast heat transmission,high efficiency and can operate properly in severe environment.it can enhance the reliability of the drive circuit and the system,and adapt to both military and commercial usage.

摘 要：为了实现小体积、高可靠的电机驱动与控制，利用hip4081专用芯片和aln厚膜混合集成技术，设计一种基于hip4081的厚膜h桥电机驱动电路，完成了h桥式驱动电路对电机双向转动和调速的控制。经实际应用，该电路不仅安全可靠地实现了电机的双向转动和调速功能，且产品体积小，导热性能好，效率高；还能在恶劣的使用环境下安全工作，提高了驱动电路和系统的可靠性，适合军、民两用。

This article mainly elaborated the current cut negative feedback cocurrent velocity modulation system main circuit and the triggering electric circuit design.

本文主要论述了电流截止负反馈直流调速系统主电路和触发电路的设计。

Carry on a mold piece to turn analysis to the UPS, among them, the point introduced to carry out the design and realization which flaps to concuss an electric circuit mold piece and goes against to change an electric circuit mold piece and SG3524 mold piece of the related sine wave with topic.

对UPS进行模块化分析，其中，重点介绍了与课题实现相关的正弦波发生器模块、逆变电路模块和SG3524模块的设计与实现。

It introduces a kind of novel loading test system, based on the operation principle of damper. this loading system is operated by the driving motor. it realizes the loading, in that the damper has a negative drive force that puts on the motor. Based on the ordinary electromagnetic damper, the thesis presents a novel hybrid excitation electromagnetic damper which has adjustable work characteristic, analyses the working principle and structural feature of the electromagnetic damper, deduces the formulas to calculate the eddy current density through the Electromagnetic theory, analyses the distribution of the eddy current in the cotyloid rotor, and also studies the method of calculating the damp torque, establishes the mathematical model of the electromagnetic damper, analyses the relationship between the electromagnetic damper structural parameter and damp torque, researches the engineering design and analysis method of the electromagnetic damper, provides theory foundation for the design and analysis of the electromagnetic damper, contrives a hybrid excitation electromagnetic damper that satisfies the target request, designs a set of compound excitation electromagnetic damping loading control system whose control core is AT89C51 monolithic integrated circuit, analyses the electric circuit part, and carries on the experimental test to this set of electric circuits. Finally it debugs this electromagnetic damping loading system, this system satisfies the target request proposed.

论文提出了一个全新的加载测试系统种类，该加载系统是在阻尼器工作原理基础上，利用电动机拖动阻尼器运转，从而阻尼器产生一个与运动方向相反的阻尼力矩，该力矩作用在电动机上实现对电动机加载测试；同时，论文在一般电磁阻尼器基础上提出了一种新型的可调式复合励磁电磁阻尼器结构，该种阻尼器的工作特性在一定范围内可进行调节；论文分析了电磁阻尼器的工作原理和结构特点，运用电磁场理论分析推导了电磁阻尼器的涡电流密度公式，分析了涡电流在转子杯内的分布图，并对阻尼力矩计算方法进行了研究，建立了电磁阻尼器的数学模型，分析了电磁阻尼器结构参数和阻尼力矩之间的关系，对电磁阻尼器的设计和分析方法进行了研究，为电磁阻尼器的工程设计建立了理论基础；设计了满足技术指标要求的复合励磁电磁阻尼器和一套以AT89C51单片机为控制核心的复合励磁电磁阻尼加载控制系统，对该控制系统硬件电路各部分进行了分析和设计，对软件进行了设计，并对控制电路进行了试验调试，该系统满足所提出的加载指标要求。

Finally we design power circuit, through the design of a stable current circuit , we solve the disaffiliate luminance in OLED

另外，还设计了后端的功率电路，通过对恒流源电路的设计很好的解决了显示屏亮度不均匀的问题。

In the part of the displayer hardware design, the I/V convert circuit and the flame intensity signal processing circuit are introduced.

在介绍数据采集和频率测量原理后，给出软件设计和数据处理子程，频率信号处理子程，键盘子程等。

Finally, the thesis, according to the laboratory condition, analyses thecontrollable circuit, drivable circuit via 80C196MC single chip,and presents someadvertent questions.

最后结合实验室具体条件，采用80C196MC单片机，分析了控制电路、驱动电路设计思路，提出需要注意的问题。

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。