[上海交大模电讲稿01.ppt

Basic Theory of Circuits, SJTU SJTU Basic Theory of Circuits SEIEE Shanghai Jiao Tong University 2009.9 Introduction Topics covered: Basic concepts Lumped-parameter circuits Variables Circuit elements Circuit model Basic rules Topics covered: Analysis of linear resistive network Mesh analysis Nodal analysis Loop analysis Cut sets analysis Analysis theorems Topics covered: Analysis of linear dynamic circuit first-order RC, RL circuit Step response and impulse response second-order RLC circuit Analysis method in frequency domain Topics covered: Analysis of sinusoidal stable state sinusoidal variable and phastor sinusoidal stable state response Circuit analysis in phasor model AC power analysis Magnetically coupled circuits Concept of balanced three-phase circuits Topics covered: Analysis of two-port network network parameter Interconnection of networks Reciprocal network analysis of the terminated two-port circuit Place of Electrical Circuits in Modern Technology Chapter 1 Fundamental Knowledge What is covered in Chapter 1: Circuit and Circuit model Circuit Variables Circuit Elements Circuit and Circuit Model Actual electrical component: a battery or a light bulb Circuit Variables Circuit Variables Circuit Variables Reference polarities for power using passive sign convention Circuit Elements Voltage and Current Sources Resistors The circuit element used to model the current –resisting behavior of a material is the resistor. Resistance is the capacity of materials to impede the flow of current. The resistance R of an element denotes its ability to resist the flow of electric current; it is measured in ohms (Ω) Symbol: R1 1k Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. i u i u t1 t2 u i i u i u t1 t2 u i Linear Time Invariant Linear Time variant Nonlinear Time Invari