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

Electronics - Devices

Oct 7, 2013 (5 years and 11 days 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

-
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