文档介绍：Massachusetts Institute of Technology
Department of Electrical Engineering puter Science
Electric Machines
Class Notes 2 ic Circuit Basics February 11, 2004
c 2003 James L. Kirtley Jr.
1 Introduction
ic Circuits offer, as do electric circuits, a way of simplifying the analysis of ic field
systems which can be represented as having a collection of discrete elements. In electric circuits
the elements are sources, resistors and so forth which are represented as having discrete currents
and voltages. These elements are connected together with ‘wires’ and their behavior is described
work constraints (Kirkhoff’s voltage and current laws) and by constitutive relationships such
as Ohm’s Law. In ic circuits the lumped parameters are called ‘Reluctances’(the inverse
of ‘Reluctance’ is called ‘Permeance’). The analog to a ‘wire’ is referred to as a high permeance
ic circuit element. Of course high permeability is the analog of high conductivity.
anizing ic field systems into lumped parameter elements and work con­
straints and constitutive relationships we can simplify the analysis of such systems.
2 Electric Circuits
First, let us review how Electric Circuits are defined. We start with two conservation laws: conser­
vation of charge and Faraday’s Law. From these we can, with appropriate simplifying assumptions,
derive the two fundamental circiut co