9781423901402_PPT_Ch02 - Information Technology in Theory...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 2 Understanding the Digital Domain Information Technology in Theory By Pelin Aksoy and Laura DeNardis
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Objectives Understand the difference between analog and digital representations of information Learn about techniques for transmitting and storing digital information Understand the use of multipliers for representing, transmitting, and storing large amounts of digital information Discuss the advantages of representing information in digital format and using digital devices for processing, exchanging, and storing information Information Technology in Theory
Background image of page 2
3 Emergence of the Digital Age “Digital information” refers to representations of numbers, text, sound, and images as a combination of two fundamental logic symbols: 1 and 0 These symbols are also called binary symbols, binary digits, or bits Digital devices process information in the form of ones and zeros; in other words, they speak a binary language Information Technology in Theory
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Emergence of the Digital Age (continued) People recognized the possibilities of digital technology They began to develop digital devices that could “speak” the binary language advancement To realize this, an efficient switch was needed Vacuum tube Transistor Integrated circuit Information Technology in Theory
Background image of page 4
5 Emergence of the Digital Age (continued) Information Technology in Theory
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 Emergence of the Digital Age (continued) An integrated circuit Information Technology in Theory
Background image of page 6
7 Emergence of the Digital Age (continued) Moore’s Law states that “The number of devices that can be integrated on a chip doubles every 18 months” Current technology indicates that Moore’s Law will reach its limit in the future, so research on alternative technologies is underway Digital technology has evolved tremendously over the past few decades and will continue to evolve Information Technology in Theory
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8 Analog Information Digital devices process many forms of information in combinations of bits Most information we encounter is analog, not in terms of 1s and 0s When we speak, we exchange information in analog format; what we hear varies proportionally, or analogously , to the sound produced by the person who is speaking We call this analog information Information Technology in Theory
Background image of page 8
9 Analog Information (continued) A speedometer example helps to understand the difference between analog and digital The speed varies continuously and an infinite number of speed values exist over a given time measurement Information produced by the speedometer is analog information The speedometer is classified as an analog device Information Technology in Theory
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
10 Analog Information (continued) Information Technology in Theory
Background image of page 10
11 Analog Information (continued) It is desirable to digitize analog information using analog-to-digital converters First task to digitize is to reduce infinite number of speed measurements to a finite number
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 42

9781423901402_PPT_Ch02 - Information Technology in Theory...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online