和电路

Emphatically Improving circuit steady degree and linear degree、 reducing noise coefficient and improving characteristic of input and output is analysed and researched.

着重对提高电路稳定度和线性度、降低噪声系数和改善输入输出特性进行了分析研究。

The readout system can efficiently reduce the influences from leakage current, input offset, process parameter instability, and other causes. The value of input weak current signal can be obtained simply through demarcation.

读出电路系统可以有效地减小漏电流、输入失调、外来干扰和工艺参数不稳定等带来的影响，通过简单的标定和换算即可得到微弱电流信号的大小。

To avoid the serious electromagnetic interferer, the analog signals are transformed to frequency pulses which are transferred to the kernel of the system. In the measure of the groove voltage, the method of float-ground is adopted to avoid the high common signal and the range switch circuit is designed to solve the conflict of the wide dynamic range and the high precision. least square Curvefit is adopted to reduce the system error.

铝电解生产现场电磁干扰非常严重，为此我们将需要测量的模拟信号就近转换为频率脉冲后再传送到控制核心；采用浮地接入方式消除槽电压信号中的共模成分；设计了量程自动切换电路以解决槽电压的动态范围宽和测量精度高的矛盾；用最小二乘法进行曲线拟和以降低测量的系统误差。

On this basis, the prccesses of interrupting small inductive current by the vacuum interruptor were modelled in a computer program, and the effects of the circuit conditions on the vacuums ...

通过试验和模拟计算，获得了ZN—6/600真空开关有关截流、触头间隙击穿和电流高频过零熄弧的随机特性，分析了一些电路条件对真空开关开断感性小电流时的操作过电压的影响。

The invention discloses a DC/DC circuit, comprising a PWM controller, a current amplifier, a peak current comparator, an error amplifier, a main switch, a synchronous switch and also an operational amplifier. The non inverting input end of the operational amplifier is used for coupling with input voltage or voltage reference, or used for coupling with the input voltage and the voltage reference; the inverting input end of the operational amplifier is used for coupling with the voltage reference or ground, and the output end thereof is connected with the non inverting input end of the error amplifier.

本发明公开了一种DC/DC电路，包括PWM控制器、电流放大器、峰值电流比较器、误差放大器、主开关和同步开关；还增设运算放大器，其同相输入端用于与输入电压或基准电压耦合，或用于同时与输入电压和基准电压耦合；其反相输入端用于与基准电压或地耦合，其输出端与所述误差放大器的同相输入端连接。

Through the reorganization, the students may have grasped this method easily, moreover they can understand and grasp the electric circuit equivalent transformation and the Kirchhoff's electric current law.

通过整理，有助于学生掌握该方法，而且更深入地理解和掌握电路等效变换和基尔霍夫电流定律。

His article concisely introduces the basic principle which single-chip micro-computer MCS-51 make application for the measurment of time difference and display-ing circuit in Loran A navigator,the design 0 f hardware and software in system.

本文简明地介绍MCS－51单片机应用于劳兰A定位仪时差测量和显示电路的基本原理、系统硬件结构和软件设计。

His article concisely introduces the basic principle which single-chip micro-computer MCS-51 make application for the measurment of time difference and display-ing circuit in Loran A navigator,the design 0f hardware and software in system.

MCS－51单片机在劳兰A定位仪中的应用阮金珍（厦门水产学院机电工程系，厦门361021）摘要：本文简明地介绍MCS－51单片机应用于劳兰A定位仪时差测量和显示电路的基本原理、系统硬件结构和软件设计。

The research results have shown that the configuration of the magnetic bearing reduces overall system size, and has high efficiency. The axial and radial suspension forces have great linearity. The symmetrical characteristic strenuously, and movement of every degree of freedom around balanceable position has no coupling and the control flux of every degree of freedom is independent. It is beneficial to simplify and design the controller and the circuit power amplifier. The magnetic bearings operate stably with decentralized PID controllers.

研究结果表明：这种磁轴承结构合理紧凑，效率高；磁轴承轴向、径向悬浮力具有较好的线性和对称性，有利于控制器及功放电路的简化与设计，并获得良好的拉制性能；各自由度运动和磁路几乎没有耦合，采用分散独立的PID控制器实现了磁轴承的稳定工作。

This technology continued to be tested and improved into the 1950's when magnetic core memory and a transistor circuit element were discovered.

这种技术不断得到实验和改进，直到20世纪50年代出现了磁芯存储器和一种晶体电路元件。

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。