ECE201_Lecture01 - E E201 Linear Cir cuit Analysis I L...

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1 EE201 Linear Circuit Analysis I Lecture 1. Topic: General circuit element, charge, current 1. Circuits Circuits are energy or signal/information processors consisting of interconnections of “simple” elements or devices OR Circuits (or networks) are arrangements of interconnected elements (real or abstract). 2. Circuit elements 3. Charge (1) What is charge? An electrical property of matter. Matter consists of atoms. (2) unit of charge: Coulomb, C. (3) symbol: Q, constant charge resistor capacitor + inductor operational amplifier (OpAmp) + + electron: –1.6019 x 10 -19 C + Battery Atom: + + protons neurons nucleus electrons: – charged protons + charged neutrons: uncharged atom: neural or charged electrons
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2 q(t) or q, variable charge 4. Current (1) What is current? Net flow of charge across an area. (2) unit: Ampere, A 1A = 1C / sec (3) symbol: I, constant or average current i(t) or i, time-varying current (4) direction: direction of positive current flow
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This note was uploaded on 04/19/2011 for the course ECE 201 taught by Professor All during the Spring '08 term at Purdue University-West Lafayette.

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ECE201_Lecture01 - E E201 Linear Cir cuit Analysis I L...

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