Programmed Review for Electrical Engineering, Third Edition
This text contains an organized review of the basic electrical engineering fundamentals, with 111 problems, solutions and explanations for the core electrical engineering concepts.
TABLE OF CONTENTS Programmed Review for Electrical Engineering, Third Edition
Chapter 6: Electronics
Discussion of and problems related to diode suppression, one-stage transistor amplifier, common base amplifier, two-stage transistor amplifier, transistor curves and load line, transistor stability, field effect transistor amplifier, vacuum tube amplifier, operational amplifer, and amplifier class.
Introduction
Only the most basic aspects of electronics are presented as they relate to the type of problems found in the PE Exam. Reference to a basic college text on electronics may be helpful in reviewing this subject.
Black Box Analysis
A circuit may be represented by a black box having an input and an output with its parameters expressed in several ways, as illustrated by the models below.
General Two-Port (Four-Terminal) Network
Open-Circuit Impedance Parameters
Short-Circuit Admittance Parameters
Hybrid Parameters
Diodes
The classical diode equation is:
where
| I s | = | saturation current |
| q | = | charge on an electron = 1.602 10 -19 coulomb |
| k | = | Boltzmann's constant = 1.38 10 -16 erg/ K |
| T | = | temperature in K ( K = C + 273) |
| V | = | forward voltage across the diode |
If V is about four times greater than kT/q (say 0.1 volt), the diode equation simplifies to:
and the dynamic forward resistance at a specific operating point is:
At room temperature, kT/q is approximately 26 mV; thus, a diode with 1 mA of forward current will exhibit 26 ohms of dynamic resistance.
The following are diode models, characteristics, and applications.
Diode Symbol and Characteristics
Diode Circuit Model
Zener Diode
Zener Model
Problem 6-1: DIODE SUPPRESSION
Q:
A...
Copyright Dearborn Financial Publishing, Inc. 2004 under license agreement with Books24x7
