Circuits Lecture Slides Intro&Module1Handouts

8/11/2019 Circuits Lecture Slides Intro&Module1Handouts

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Linear Circuits

An introduction to electric circuit elements and a study of circuitscontaining such devices.

Dr. Bonnie H. FerriProfessor and Associate ChairSchool of Electrical andComputer Engineering

School of Electrical and Computer Engineering

Lecturers

2

Nathan V. ParrishGraduate Research Assistant

School of Electrical andComputer EngineeringPhD Candidate & GraduateResearch AssistantSchool of Electrical and ComputerEngineering

Dr. Bonnie H. FerriProfessor and Associate Chair

School of Electrical andComputer Engineering


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Overview

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analysis of circuits includingresistors, capacitors, and inductors with DC andAC sources in the time domain and in thefrequency domain

people with ascientific/technical background who are notelectrical or computer engineers

first course incalculus, matrices and linear algebra, complexnumbers, introduction to circuit elements

Learning Outcomes

4

Be able to determine voltages and currents in awith single or multiple DC sources

Be able to determine

Be able to sketch theto step changes in the source voltage

Be able to analyze the of reactivecircuits

Be able to analyze the


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Concept Map

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Understand the concept map Relate material to practical problems and experience

Use the printed slides as a guide to taking notes Identify and organize important concepts and skills

Use the Pause button Take short quizzes in each lesson

Do the homework Do the quiz after each module Ask and answer questions on the forum

How to Succeed In Linear Circuits

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No direct email to instructional staff Send questions or comments to the forum

Only respectful, constructive comments are allowed

Answer questions on forum

Georgia Tech course Textbook

Labs and data acquisition board

Policies

7


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Module 1:Background

Overview

An introduction to electric circuit elements and a study of circuitscontaining such devices.



Concept Map

2


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Concept Map: Background Module 1

3


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Nathan V. ParrishPhD Candidate & GraduateResearch AssistantSchool of Electrical andComputer Engineering

School of Electrical and Computer Engineering2

Charge andCurrent

Calculate the force charges exert on one anotherCalculate functions of charge and current

Calculate the forces two point charges exerton each other

Calculate current based on a charge function

Calculate charge based on a current function

Lesson Objectives

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Property of matter

Quantized

Measured in Coulombs ( C )

Electric Charge

7

Electromagnetic Force

8


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Electric Fields

9

Electrical Current

10


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Reference Directions

11

Discussed charge as a property of matter

Calculated forces of charge using Coulombs Law

Explored electric fields the means of thisinteraction

Described current as the time derivative of charge Emphasized the importance of current reference

directions

Summary

13


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Voltage

Modify voltage values to reflect voltage referencesDescribe how a chemical battery worksIdentify if a battery is charging or discharging

Calculate voltage from the energygained/consumed as a charge moves through anelectric field

Correctly specify voltages as references change

Describe the operation of a chemical battery Identify if a battery is charging or dischargingbased on the voltage reference and current flow

Lesson Objectives

5


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Voltage Reference

8

Example: Finding Voltages

9


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Charge crates electric fields

Voltage is energy gained/released as chargesmove through an electric field

Described how voltage originates fromdifferences in charge density

Case study: how lead-acid batteries work

Summary

13


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Power and Energy

Calculate power and energyDescribe the difference between power and energyUse conservation of energy to find unknown energyUse power to calculate current or voltage

Calculate power from energy function Calculate energy from a power function Use conservation of energy to find power of an

unknown device

Calculate power from voltage and current Find a voltage or a current for a device with a

known power

Lesson Objectives

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Power

6

Instantaneous Change

7

-1 0 1

0

1

Time(s)

Energy(J)

-1 0 1

-1

0

1

Time (s)

Power(W)


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You run a power company. Do you chargecustomers for power or energy? Why?

Charging for Power

8

Conservation of Energy

9


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Reference Direction

10

Using Power for Analysis

11


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Described the relationship between power andenergy and how to calculate them

Described how voltage and current relate topower

Presented a derivation for conservation of powerand how this property is used in analysis

Solved first simple analysis problem

Summary

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Introduction toCircuit Diagrams

Identify a collection of basic circuit elementsBe able to identify nodesIdentify short/open circuitsIdentify equivalent circuit diagrams

Identify a set of circuit elements

Identify the nodes in a circuit diagram

Recognize self-contradictory circuits

Identify open/closed circuit

Identify when two circuits are equivalent

Modify a circuit to form an equivalent circuit

Lesson Objectives

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Circuit Diagrams

6

Devices are presented withsome known parameters

We wish to identify thebehavior of the device

Identify behavior based on thecircuit using calculation

What is Circuit Analysis?

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Zero internal resistance

Nodes and junctions

Zero voltage drop on node

Arbitrary current possible

Wires

8

Independent Sources

9


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Dependent Sources

10

Resistors

11

Devices for resisting current

Drawn as zig-zag lines

Number of zigs ands zags can vary

Other similar devices will beintroduced as they are encountered


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Ground

12

Common Point of reference

Path of electrons

Lightning rod (literal ground)

Prevent electrocution

Prevent damage to sensitivecomponents

Open/Short Circuits

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Self-Contradictory Circuits

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Putting It Together

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Changing Circuits

16

Described the concept of a node and how to identify one Introduced independent and dependent voltage and current

sources Introduced a resistor a device that will be discussed in

more detail later

Presented the idea of a ground Showed examples of self-contradictory circuits Described how circuits can be equivalent

Summary

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Module 1Background

Wrap Up

Summary of Background Module

Concept Map: Background Module 1

3


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Understand charge and current

Be able to calculate the effect of one charge onother charges

Be able to calculate current from charge flow in

time

Important Concepts and Skills

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Understand how voltage is created bydifferences in charge density

Understand how chemical reactions can cause avoltage

Be able to use voltage references

Be able to identify some basic circuit elements Be able to identify nodes of a circuit diagram

Be able to identify open/short circuits

Be able to move elements of a diagram

Important Concepts and Skills

5

Be able to calculate power from energy

Be able to analyze circuit using conservation of power

Be able to analyze circuit using power, voltage, and current


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Concept Map

6

Documents

Circuits Lecture Slides Intro&Module1Handouts