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Digital Logic Lecture 1 Introduction

Digital Logic Lecture 1 Introduction. By Dr Zyad Dwekat The Hashemite University Computer Engineering Department. Outline. Introduction. Digital systems. Chips’ Technologies. Computer aided design. Logic Circuits Design or Development Process. The Hashemite University. 2. Introduction.

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Digital Logic Lecture 1 Introduction

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  1. Digital LogicLecture 1Introduction By Dr Zyad Dwekat The Hashemite University Computer Engineering Department

  2. Outline • Introduction. • Digital systems. • Chips’ Technologies. • Computer aided design. • Logic Circuits Design or Development Process. The Hashemite University 2

  3. Introduction • This course represents a basic block many engineering branches. It is an important key to understand subsequent courses. • We will start by explaining the name of our course, “Digital Logic” starting by: • Digital Then • Logic The Hashemite University 3

  4. Digital Systems I • Differentiate between two types of systems or signals: • Analog: found in nature and initially all systems were analog. • Digital: evolved from analog systems as a result of technology development to avoid the disadvantages of the first class. The Hashemite University 4

  5. Digital Systems II • Examples: • Analog signal: speech. • Digital signal: clock pulses for a computer. • Analog system: traditional audio phones. • Digital system: computers. The Hashemite University 5

  6. Digital Systems III • Digital or discrete values can be: • Binary: one bit only, either 0 or 1. • Binary code: a series or sequence of bits to represent specific values. • From hardware point of view , i.e. electronically, these values are represented by electrical signals (voltage or current). 0  Low  0 volt. 1  High  5 volt. • The applications or the device that we deal with can produce digital signals directly, e.g. computers, or produce analog signals, e.g. phones. • We can convert an analog signal to digital using Analog to Digital Converter (ADC) and for the reverse operation we use a Digital to Analog Converter (DAC). • Examples: voice over IP (VoIP) applications. The Hashemite University 6

  7. Big Picture • Digital circuit: called logic circuits since they process data represented as binary signals via logic gates or components (specifies the relation between inputs logically). The Hashemite University 7

  8. Logic • Logic: is something related to human’s way of thinking where hypothesis and assumptions are made to simplify things. • In our situation, we use the binary symbols 0, 1 or we can equate them with other values according to the needs of the moment. • Example: 0 = false = No = 0 volt or 1 volt ... 1 = true = Yes = 5 volt or 12 volt ... • Also, in logic we have only two states or values, either up or down, nothing between. • The logic that deals with states between 0 and 1 (i.e. more than two states) is called fuzzy logic. • Although it seems limited but it proves to be very useful. Example: computers are based on the two states operation and they are very powerful. The Hashemite University 8

  9. Topics Covered in the Course The Hashemite University 9

  10. Course Textbook • Digital Design, by: M. Morris Mano, Prentice Hall Inc., 2012, 5th Edition. • In addition to the slides and notes posted by the instructor. The Hashemite University 10

  11. Course Website www.mlms.hu.edu.jo • Called Moodle • Your instructor will add your names to Moodle. • For the first time your user name and password for the website will be your university ID, you can change the password later. • It will be our official website where you will find: • The syllabus. • Course lecture notes and slides. • Announcements posted by the instructors. • Exams dates, time slots, and location. • Make sure to check it daily. The Hashemite University 11

  12. Additional Notes • This lecture covers the following material from the textbook: • Course Syllabus. • Chapter 1: Section 1.1 The Hashemite University 12

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