lecture02_06_23_2010

# lecture02_06_23_2010 - EE40 Lecture 2 Josh Hug EE40 Summer...

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1 EE40 Summer 2011 Hug EE40 Lecture 2 Josh Hug 6/22/2011

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2 EE40 Summer 2011 Hug Important Dates and HWs • Discussions start Friday • Reading assignments 1 and 2 have been posted – Feel free to skim the actual reading – Do the problems! • Homework 1 posted today, due 6/29, due next Wednesday – Homework is fairly short but tough – Do the practice problems first! • TA Office hours start today (see syllabus) – I’ll hold office hours Friday from 11-12:00 in 504 Cory – Neel’s OH start next Monday
3 EE40 Summer 2011 Hug Summary From Last Time Current = rate of charge flow Voltage = energy per unit charge created by charge separation Power = energy per unit time Ideal Basic Circuit Element – 2-terminal component that cannot be sub-divided – Described mathematically in terms of its terminal voltage and current Circuit Schematics – Networks of ideal basic circuit elements – Equivalent to a set of algebraic equations – Solution provides voltage and current through all elements of the circuit

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4 EE40 Summer 2011 Hug Topic 2 Setting Up and Solving Resistive Circuit Models
5 EE40 Summer 2011 Hug Circuit Schematics • Many circuit elements can be approximated as simple ideal two terminal devices or ideal basic circuit elements • These elements can be combined into circuit schematics • Circuit schematics can be converted into algebraic equations • These algebraic equations can be solved, giving voltage and current through any element of the circuit

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6 EE40 Summer 2011 Hug Today • We’ll enumerate the types of ideal basic circuit elements • We’ll more carefully define a circuit schematic • We’ll discuss some basic techniques for analyzing circuit schematics – Kirchoff’s voltage and current laws – Current and voltage divider – Node voltage method
7 EE40 Summer 2011 Hug Circuit Elements • There are 5 ideal basic circuit elements (in our course): – voltage source – current source – resistor – inductor – capacitor • Many practical systems can be modeled with just sources and resistors • The basic analytical techniques for solving circuits with inductors and capacitors are the same as those for resistive circuits active elements , capable of generating electric energy passive elements , incapable of generating electric energy

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8 EE40 Summer 2011 Hug Electrical Sources • An electrical source is a device that is capable of converting non-electric energy to electric energy and vice versa . Examples: – battery: chemical electric – dynamo (generator/motor): mechanical electric Electrical sources can either deliver or absorb power
9 EE40 Summer 2011 Hug The Big Three + _ v s i s R i v i v Constant current, unknown voltage i v

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10 EE40 Summer 2011 Hug Circuit Schematics • A circuit schematic is a diagram showing a set of interconnected circuit elements, e.g.
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## This note was uploaded on 09/09/2011 for the course EECS 40 taught by Professor Chang-hasnain during the Summer '08 term at Berkeley.

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lecture02_06_23_2010 - EE40 Lecture 2 Josh Hug EE40 Summer...

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