loop circuit中文什么意思

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1. The basic operation principle of phase - locked frequency synthesizer and the type of circuits are expatiated systematicly in this paper . the principle of operation on sampling phase detector and some characteristics including the linear tracking and phase noise in phase loop circuits are analyzed deeply . the research is emphased on the theory and design method of circuits in the sampling phase - locked frequency synthesizer . then , the expansion capturing circuit is analyzed and designed for better performance of capturing loop circuits . at last , the loop filter is also analyzed and contrived taking account of effection of additional phase shift by the sampling - holder . the general research on the theory and technology of sampling phase lock in the paper will make a basement for the development of new product
   本文系统的阐述了锁相频率合成器的基本工作原理及电路类型；较深入地分析了取样鉴相工作原理及电路、锁相环路的线性跟踪特性和相位噪声特性；重点对取样锁相频率合成器电路理论和设计方法进行了研究；为了改善环路的捕获性能，对扩捕电路进行了分析和设计，并用wewb32软件对电路进行了仿真；考虑到取样保持器的附加相移影响，对环路滤波器进行了分析和设计。
2. An approximate analysis of medium frequency parallel converter used in power supply controlled by microcomputer is presented in this work . the proposed approach may be applied to converters whose industrial applications are induction heating and metal melting installations . it is shown that closed loop circuit feedback control and opened loop circuit control are separated during the zero - power start - up process
   通过阅读资料和文献，在对中频感应加热及其相关技术的发展、现状和趋势作了一个比较全面而深刻的研究基础上，论文分析了并联感应加热电源闭环控制的控制策略，并采用闭环开环分离的方法，解决了零电压启动问题；设计了中频感应加热电源的微机控制系统。
3. The computer data structure of branch circuit element type and its linear list is defined ; the problem describing a complicated circuits whth data structure is solved . kirchhoff branch element type , kirchhoff colosed loop circuit element type and the set of kirchhoff closed loop circuits are defined ; the computer algorithm for getting a set of kirchhoff closed circuits is given out . and so , using computer for automaticly analysing and solving complicated linear circuit problem can be realized
   针对一般的线性电路，用数据结构中关于定义抽象数据类型的方法定义了电路支路数据元素类型及相应的线性表，解决了用数据结构描述任一复杂电路的问题.定义了基尔霍夫支路数据元素类型、基尔霍夫回路元素类型和基尔霍夫回路集，给出了求基尔霍夫回路集的算法.从而实现了计算机自动分析、求解复杂线性电路的问题
4. With promulgation and obliging actualization of iec 1000 - 3 - 2 etc . international standards , power factor correction ( pfc ) technique become a hotspot of research in power electronics field . based on average current mode , the paper introduce the design and implementation of a fully digital controlled single - phase boost power factor corrector with fast response . the control - loop circuit is realized using digital control and the corrector can tend to unity power factor , lower current harmonics and high transfer efficiency
   本文在平均电流模式控制的有源功率因数校正技术的基础上，设计了一种控制电路基于数字信号处理器( dsp ) 、主电路采用boost变换器拓扑结构的全数字单相功率因数校正器，用数字电路代替传统的模拟电路来实现对整个回路的控制，最终使得校正器具有输入功率因数接近于1 、低电流谐波以及高转换效率的特性。
5. On the promise of holding the control means of pll , introducing the control ways of wnn optimized by immune algorithms into the control of induction heating power , the author brought forward a multiple control strategies , that is , combined a wave neural networks which optimized by means of immune algorithms with digital phase locked loop circuit . simulation results show that it is feasible and effective
   在保留锁相环控制的基础上，引入了基于免疫优化的小波神经网络，提出了把小波网路控制和数字锁相环控制相结合的控制策略，并以感应加热电源为控制对象，仿真结果表明了该控制策略的有效性与可行性。