1. ECE 2110: Introduction to Digital Systems Instructor: Dr. Omar Elkeelany Email: OElkeelany@tntech.eduOElkeelany@tntech.edu Tel: 931-372-3450

2. ECE 2110: Introduction to Digital systems Lecture 1: Introduction

3. ECE 2110: Introduction to Digital systems A successful digital designer: Be competent in:  Debugging  Business requirements and practices  Risk-taking  Communication

4. ECE 2110: Introduction to Digital systems Analog vs. Digital Analog:  time-varying signals  Take any value across a continuous range of voltage, current or whatever metric Digital: SAME. But pretend they don’t.  Modeled as taking only one of two discrete values at any time  0/1, LOW/HIGH, FALSE/TRUE,…

5. ECE 2110: Introduction to Digital systems Examples of once-analog systems that have now gone digital: Analog Cameras: film production!  Digital Cameras: Better or Worse? DVD: What does it stand for? CD players, MP3 players Telephone Smart Phones Game consoles, HDTVs, etc. Traffic Control with smart cameras!

6. ECE 2110: Introduction to Digital systems Analog versus Digital 103.5 Analog Voltage meter Digital Voltage meter About 100 Which one is better? WHY?

7. ECE 2110: Introduction to Digital systems Analog offers Continuous Spectrum Digital offer distinct Steps Continuous light/color spectrum Discrete 5 level light/color spectrum

8. ECE 2110: Introduction to Digital systems Analog has Ambiguity Digital has only one interpretation Analog Clock 1:56 pm Digital Clock About 2:00 1:50 1:56

9. ECE 2110: Introduction to Digital systems Why Digital? Reproducibility of results Ease of design: digital design is logical. Uses discrete math or Boolean Algebra (vs. traditional math) Flexibility/Programmability: programs are easy to change Ease of design Speed of delivery Economy. Simplified design allows mass production Uses Steadily Advancing Technology