查询词典 driving circuit

Recently, CMOS Image Sensor which is solid-state circuit the same as CCD has developed quickly. Because it has a lot of advantages, such as high integrity, low power, simple technics, and short developing cycle that are different from the intrinsic disadvantages of CCD as complicated driving circuit, low data and frame rate, low integrity and high power, CMOS Image Sensor is widely used in industry, surveillance, avigation and spaceflight affairs. The developed countries have used CMOS Image Sensor in the domain of space exploration and navigation such as star trackers and cameras for remote sensing images.

中文摘要近年来快速发展的CMOS图像传感器与CCD一样都属于固态成像器件，但CMOS图像传感器具有高集成、功耗低、工艺简单和开发周期短等优点，克服了CCD器件驱动设计复杂、数据读取效率低、帧频低、集成度低、功耗大的固有缺点，已被广泛应用在工业、监控、航空和航天等众多领域，发达国家已经将CMOS图像传感器应用于星敏感器、遥感成像等空间探测、导航领域。

One of the driving circuit switching power supply, buffer circuit, the main control circuit and magnetic components to optimize the design.

其中，对开关电源的驱动电路、缓冲电路、控制电路及主要磁元件进行优化、设计。

In this topic, the dynamic analysis methods for piezoelectric vibrator are studied systematically based on the theoretical model, FEM numerical experimentation and FEM governing equation for given compound-mode vibrator, and some valuable conclusions are obtained. The main work accomplished is summarized as follows: 1.Elaborate the main modeling methods for piezoelectric vibrator and the significance and necessity to study the dynamic characteristics of piezoelectric vibrator which emphasize the urgency of this paper. 2.Take the bending deformation induced by piezoelectric ceramic as example, the energy transfer mechanism of electric energy to mechanical energy are analyzed; the motion and force transfer mechanism are analyzed for the longitudinal-bending vibrator. 3.Based on mode assumption and Hamilton principle, the coupling model of piezoelectric vibrator of linear USM is built; moreover, the equivalent circuit model is obtained and a coupling equation represents the relation between electric parameters and mechanical parameters is derived which provides foundation to match the vibrator and driving circuit. 4.Combine the constitutive equation of piezoelectric ceramic with elastic-dynamical equation, geometric equation in force field and the Maxwell equation in electric field and the corresponding boundary condition equation, the FEM control equation for piezoelectric vibrator of USM to solve dynamic electro-mechanical coupling field is established by employing the principle of virtual displacement. The equation lays the foundation to study the non-linear constitutive equation of piezoelectric ceramic driven by high-power. 5.Define the dynamic indexes of characteristic of vibrator and carry out variable parameters simulation by calculating the model parameters and the electric characteristics of vibrator are simulated according to the equivalent circuit model. By numerical experimentation, the working mode of vibration of vibrator and the shock excitation results of the working frequency band which provides the mode frequency to realize bimodal are analyzed. Detailed calculation of the electro-mechanical coupling field parameters is made by programming the FEM control equation.

本课题从理论模型、有限元数值试验、有限元控制模型等方面以复合振动模式振子为例对超声电机压电振子的动力学特性及其分析方法进行了全面系统地研究，得出了许多有价值的结论，主要概括如下： 1、阐述了目前针对超声电机压电振子的主要建模方法，对压电振子动态特性的研究意义和必要性进行了论述，突出了本文研究内容的迫切性； 2、以压电陶瓷诱发弹性体发生弯曲变形为例，分析了压电陶瓷通过诱发应变来实现机电能量转换的机理；对基于纵弯模式的压电振子的运动及动力传递机理进行了分析； 3、基于模态假定，利用分析动力学的Hamilton原理，建立了面向直线超声电机压电振子的机电耦合动力学模型，并据此建立了压电振子的等效电路模型，导出了电参量与动力学特性参量的耦合方程，为压电振子与驱动电路的匹配提供了依据； 4、从压电陶瓷的本构方程出发，综合力场的弹性动力学方程、几何方程、电场的麦克斯韦方程以及相应的边界条件方程，采用虚位移原理，建立了压电振子动态问题机电耦合场求解的有限元控制方程，为研究其大功率驱动下的非线性本构模型奠定了基础； 5、界定压电振子的动力学特性指标，对压电振子的机电耦合动力学模型参数进行计算及变参数仿真；依据等效电路模型，对压电振子的电学特性进行了仿真分析；通过有限元数值实验，对压电振子工作模态附近的模态振型及工作频率附近的频段进行了激振效果分析，找出了实现模态简并的激振频率；利用有限元控制方程，通过编程计算，对压电振子的力电耦合场参数进行了详细计算，得出了一些有价值的结论。

High-frequency continuous modulation on the high-power semiconductor laser is required in our ladar system. The theory and driving methods of the semiconductor laser is summarized in this article. Two kinds of driving circuit including linear power amplifier and resonance power amplifier are designed for continuous and quasi continuous modulated laser.

针对研制的无扫描激光雷达系统，需要对大功率半导体激光器进行高频连续调制，本文总结了半导体激光器的原理和驱动方法，并针对连续和准连续调制大功率激光器的特点分别设计了两套驱动电路，包括线性功率放大驱动电路和谐振功率放大驱动电路。

A top-plane side driving portion is structured by a row electrode driving circuit, a reversing portion, and a reversing switch.

顶面侧驱动部分包括行电极驱动电路、换向部分和换向开关。

The backplane side driving portion is structured by a column electrode driving circuit, a reversing portion, and a reversing switch.

背面侧驱动部分包括列电极驱动电路、换向部分和换向开关。

Propagational delay of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side.

Propagational延迟开关时，巴士在一个系统中使用，是由开关的驱动侧及其与驱动端上的负载驱动电路的相互作用决定的。

Thereinto, the analog receiver, the main body of the UATS preprocessor, conditions the output signals of the receiving transducer, which are amplified and filtered.And the driving circuit implements the low-pass filtering of the D/A converters output signals and offers the result to the power amplifier circuit as its input.In addition, the fathoming circuit acquires the depth information of the underwater electronic equipment cabin to ensure a relatively convenient way to adjust and recover the underwater parts of the system.

其中，模拟接收机完成对接收换能器输出信号的放大、滤波等调理工作，是水声靶标系统预处理机的主体部分；驱动电路实现对D/A转换器输出信号的低通滤波，用以产生功率放大电路的输入信号；测深电路用来获取水下电子舱的深度信息，便于系统水下部分的调整和回收。

By using VDMOS field-effect transistorsas the switch elements, the electronic controlling circuits of the PM brushless DC motor, including the main power switch circuit , power driving circuit, absorption circuit, and logic controlling circuit, are designed.

用 VDMOS场效应晶体管作为开关元件，设计了稀土永磁无刷直流电机的电子控制线路，主要包括：功率开关主回路，功率驱动回路，吸收回路，逻辑控制电路。

A new kind of driving circuit is designed, it realizes driving and frequency tracking of USM.

本文研究并设计了一种新型的驱动电路，用以实现超声波电机的驱动和频率的自动跟踪。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。