01-Introduction Overview Course Objectives Course Objectives DC ...

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Oct 7, 2013 (3 years and 10 months ago)

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1/3/2012

1

01
-
Introduction


ECEGR 210

Electric Circuits I


Overview


Course Objectives


DC Circuits


Switching Circuits


Operational Amplifiers


2

Dr. Louie

Course Objectives


Analyze electric circuits in the time domain


DC Circuits


Switching Circuits


Operational Amplifiers


Circuit theory is used in most undergraduate
electrical engineering course


Power and Energy


Electronics


Controls


Dr. Louie

3

Course Objectives

1. Understand the definitions of electrical quantities and circuit
elements.

2. Compute currents, voltages, power, energy in resistive
circuits

3. Analyze circuits with dependent sources.

4. Analyze and design elementary ideal op amp circuits.

5. Use equivalent circuits (Norton,
Thevenin
).

6. Perform mesh and nodal analysis.

7. Analyze and design first order circuits.

8. Analyze and design second order circuits.

9.
Use SPICE
-
based software for simulation.

10.
Communicate engineering data and results in a clear and
concise way.


Dr. Louie

4

DC Circuits


DC: Direct Current


Batteries


Electronic devices


Some motors, generators


Automotive


Steady
-
State Analysis


Interested in


Voltage


Current


Power


Dr. Louie

5

Switching Circuits


Circuits with switching elements


On/Off, Open/Close


Interested in behavior
wrt

time


Solving using differential equations

Dr. Louie

6

time

1/3/2012

2

Operational Amplifiers


Integrated Circuit


Very common in electric circuits


Not concerned with internal components


Interested in


Gain


Other characteristics

Dr. Louie

7

Electric Circuits


Circuits considered are
linear


Linear equations are easily solved


Voltage, current, impedance are linearly related



V: voltage


I: current


R: resistance

Dr. Louie

8

(linear equation)

Current

1/R

voltage

Example


If voltage is doubled, and resistance is fixed,
what happens to the current?

A.
No Change

B.
Doubles

C.
Reduces by one half

Dr. Louie

9

Example


If voltage is doubled, and resistance is fixed,
what happens to the current?

A.
No Change

B.
Doubles

C.
Reduces by one half

Dr. Louie

10

Electric Circuits


Fundamental concepts of electrical engineering


Problem formulation


Problem solving


Analogous concepts in:


Thermodynamics


Electromagnetics

(magnetic circuits)


Other linear systems

Dr. Louie

11

Electric Circuits


Circuits are analog (compare to digital systems in
ECEGR 201)


Analog
: something that can assume a continuous
range of values


Temperature


0
-
5 Volts

Dr. Louie

12

time

time

Analog Signal

Digital Signal