基尔霍夫电压定律在电路分析中的应用

结合直流电路、正弦交流电路、放大电路等具体电路,运用基尔霍夫电压定律分析问题,得出了运用基尔霍夫电压定律在列回路电压方程中,计算任意两点间电压、电路开口处电压以及计算电路中某点电位等方面的分析思路,使得基尔霍夫电压定律的应用更加广泛。     

基于场论谈基尔霍夫定律新的表达式推导

基尔霍夫定律是电路基本定律,而麦克斯韦方程组则是电磁场基本定律。为了研究传输线所要用到的理论基础,采用场论思想（又称电网络理论）,通过推导和研究得到了基尔霍夫电流定律和电压定律的新表示式,该新表示式对探讨基尔霍夫定律与场论（电网络理论）之间的关系,进一步研究传输线理论、信号在PCB的传播、反射及应用有一定的借鉴作用。     

《电路理论基础》自学考试大纲

第一部分电路基本定律和电元件(一)基尔霍夫定律电路及电路模型电路变量电压、电流及参考方向基尔霍夫电压定律(KVL)和基尔霍夫电流定律(KCL) 图论基础、支点、节点、树及其性质,树文和联支,回路和基本回路,割集和基本割集,电压图和电流图,电路独立KVL方程,电路独立KCL方程,关联矩阵,KVL和KCL的矩阵表示     

受控源的电阻性在电子技术中的应用

基本放大电路的输出电阻计算较为复杂,常常要用到基尔霍夫电流定律和基尔霍夫电压定律,涉及的电路知识较多。文章采用的利用受控源的电阻性求解输出电阻的方法,只需要欧姆定律和简单的电阻串并联知识就可以解决。     

一种基于外部特性的晶体管电路模型的构建方法

晶体管外部特性是指输入侧电压与电流间的关系和输出侧电压与电流间的关系.对晶体管放大电路中的晶体管输入/输出端口及其外部电路的电压-电流间关系进行图解分析,得到解的数学描述,再对微变增量用微分量代替,从而获得晶体管端口电压电流间的线性描述.使用基尔霍夫电压定律及电流定律对该线性描述进行解读之后,选用线性电阻、恒压源和受控电流源作适当连接,形成与解读结果相一致的反映放大电路中晶体管端口实际变量关系的电路模型.用于晶体管放大电路静态分析和动态分析的晶体管电路模型是这一模型的特殊情况.     

基于基尔霍夫定律的电路分析的序列方法

提出基于基尔霍夫定律的电路分析的序列方法,其优点是独立变量个数少,且适用于含非线性元件、可变元件或未定元件的电路。     

含受控源典型支路方程的讲解

基尔霍夫定律和元件特性是电路分析的两个基本依据,支路方程是元件特性的具体体现形式.随着计算机技术在电路分析和电路设计中的广泛应用,用系统法建立电路方程这一内容在电路理论课程的教学中日显重要.正确地理解和列写矩阵形式的含受控源支路的特性方程是学习系统法的重点和难点之一.本文就电路中典型支路特性方程的讲解进行了较为深入的讨论,对矩阵形式支路方程的列写方法和步骤以及对方程中各项含义的正确理解进行了详细的论述.     

无线电基础知识讲座

在电路分析中，常用到一些基本的定律和定理，这些定律和定理是：欧姆定律、全回路欧姆定律、阻抗匹配原理、基尔霍夫定律、等效电源定理、叠加定理、置换定理、互易定理、电桥原理和网络转换原理。下面分别予以介绍。     

依赖公理约简的经典规划方法

 基于可满足性的规划方法通过将经典规划问题转换为一系列可满足性问题进行求解.几乎所有基于可满足性的规划编码都存在着大量的重叠公理和冗余公理,直接决定了编码理论的编码大小与求解难度.通过分析基于Graphplan的编码方式,分别提出了重叠公理的判定策略和冗余公理的删除策略.在SATPLAN2006规划系统中实现相应的编码方式并与原系统进行比较,实验结果表明:该约简方法能够在不降低规划性能的前提下有效地压缩转换理论的编码大小.通过分析基于状态的编码方式,提出了重叠公理的判定策略.重叠公理与冗余公理的约简容易实现,且并未改变知识库的结构模式,为进一步提高规划系统处理更大规模问题的能力提供了可能.     

用特勒根定理求解复杂网络问题

特勒根定理是由基尔霍夫定律导出的,和基尔霍夫定律一样有广泛适用性。但目前电路课程中对特勒根定理的应用多限于某些结论的推导过程,在习题中涉及的类型也比较单调。因此,同学们难于对特勒根定理有深刻的印象。若能在电路课程的不同章节适当地提供一些应用特勒根定理求解电路问题的例子,这对于开拓同学的思路,巩固对定理的理解无疑是很有帮助的。本文以此为目的,介绍用特勒根定理求解复杂网络问题。     

Generalized Partial-Element Equivalent-Circuit Analysis for Planar Circuits With Slotted Ground

A generalized partial-element equivalent-circuit (PEEC) method is proposed for modeling a planar circuit with a thin narrow slot on the ground. The approach is based on the coupled mixed potential integral equations for a problem with mixed electric and magnetic currents. The coupled integral equations are converted into a lumped-element circuit network using Kirchhoff's voltage law and Kirchhoff's current law of the circuit theory. The full-wave Green's functions for a grounded dielectric substrate problem are used. The interactions between electric current on a microstrip line and magnetic current on a slot are taken into account by introducing two kinds of controlled sources. This generalized PEEC model will be very useful in signal-integrity analysis for multilayered circuits. To validate the generalized model, three numerical examples consisting of microstrip lines and slots on the ground are presented. The results obtained by the proposed generalized PEEC model are compared with those obtained by commercial electromagnetic simulation software and published experimental results. Good agreement is obtained.      

基氏拓扑规则在网络分析中的应用

阐述了应用基氏第三定律和第四定律及其它拓朴规则作为研究电网络的工具去求解电网络的驱动点导纳、转移导纳、传输化、电流变量、电压变量的一种方法,介绍了基氏拓扑规则在网络研究中心的优越性。     

全电感割集网络初始电流的矩阵算法

在电路瞬态分析中会遇到换路后形成全电感割集的情况,由于此时换路定则失效,给确定复杂电路初始值带来困难.本文依据磁链守恒、基尔霍夫电流定律及电感元件伏安关系,导出了计算全电感剖集网络初始电流的矩阵算法,并给出实现该算法的MATLAB通用程序,使得计算大规模全电感割集网络初始值变得轻而易举.     

Relaxation properties of fields and circuits

Electromagnetic fields tend to be in the lowest energy state consistent with the constraints of the system. This relaxation property of fields is discussed from the viewpoint of a variational principle. The study encompasses many closely related theorems, widely dispersed throughout the literature, whose origin is traced to a single variational principle derivable from Maxwell's equations. Kirchhoff's voltage law is also shown to follow from the variational principle. This leads to an interesting interpretation of a fundamental law in circuit theory, and also permits the derivation of the principle of conservation of flux.     

Circuit theory of periodically driven nonlinear systems

The systems under discussion are nonlinear, but driven by a strong periodic "carrier." Examples of such systems are oscillators, frequency multipliers, limiters, modulators, and periodically driven feedback systems. It is of interest to inquire how small perturbations on the periodic driving are propagated throughout the system, and to this end a circuit theory for these perturbations is developed. In different Contexts these perturbations could be desired or undesired modulation, noise, hum, or synchronizing signals. In general the random processes in such a system will, because of the periodic driving, be nonstationary; but various representations are developed that are stationary, and hence can be described by spectral analysis. The concept of impedance is developed for the small perturbations, and the validity of Kirchhoff's Laws is examined. Specific problems are not treated in detail; instead, a general framework is set up within which a variety of problems can be analyzed. Problems of this sort include the theory of noise in oscillators, propagation of noise and modulation in nonlinear systems, the noise theory of frequency multipliers, and synchronization of oscillators.     

双极型晶体管宽带放大器传递函数和输入、输出阻抗的研究

本文提出双极型晶体管是一种电荷控制器件并提出其电荷控制参数的概念;建立描述晶体管内部物理过程的微分方程;与外电路的基尔霍夫定律结合,导出各种基本晶体管宽带放大器的传递函数、输入和输出阻抗的解析表示,作为应用Bode反馈理论来设计宽带反馈放大器的基础。     

A new charge conserving capacitance model for GaAs MESFET's

We present a new charge conserving capacitance model for Gallium-Arsenide (GaAs) metal semiconductor field effect transistors (MESFET's) based on the quasi-static approximation and a proper partitioning of the channel charge between the source and the drain terminals. A total of nine so-called transcapacitances were determined by taking derivatives of the various terminal charges with respect to the voltages at source, drain, and gate. The transcapacitances are nonreciprocal, i.e., C_ij≠C_ji when i≠j, and can be organized in a 3×3 matrix incorporating Kirchhoff's current law (charge conservation) and independence of reference. The present capacitance model is valid both above and below threshold, and shows good agreement with experimental data over a wide range of gate and drain biases. The model is analytical and suitable for implementation in circuit simulators     

The tapered antenna and its application to the junction problem for thin wires

When electrically thin conductors of different cross sectional size meet, the continuity of current is assured by Kirchhoff's current law. Additional conditions must be imposed on the derivatives of the currents or the charges per unit length. The nature of the required conditions is determined from an analysis of the tapered antenna.