1. 2009
Digital Design
Lecture 1: Course Overview
Spring 2010
Xuan-Tu Tran, PhD
Faculty of Electronics and Telecommunication
Smart Integrated Systems (SIS) Laboratory
College of Technology (Coltech), VNU Hanoi
Email: tutx@vnu.edu.vn
www.coltech.vnu.vn/~tutx
General Information
Lecturer
Xuan-Tu Tran, PhD
Office: Room 314, Building G2 (by appointment)
Tel.: +84-4-3754 9664 (Office) OR +84-9-0401 9977 (Mobile)
Email: tutx@vnu.edu.vn
Home page: http://www.coltech.vnu.edu.vn/~tutx
Course Web Page
Link from my page (not yet)
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2. Course Objectives
Students should be able to…
Digital system analysis
Numbering systems, Boolean Algebra (conversion, calculation)
Design, analyze combinational circuits (adders, multiplexers…)
Design, analyze sequential circuits (flip-flops, registers, counters,
FSM…)
Build their own projects and report related matters
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Course outline
Introduction to Digital Systems
Numbering Systems
Boolean and Switching Algebra
Combinational Circuits
Sequential Circuits
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3. Administrative Details
Grading
Take-Home Entry Exam 0%
Project Exams 50%
Final Exam (writing) 50%
Students have to be present:
at least 70% of the course meetings
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Administration
Text books
Digital Design Fundamentals
By Kenneth J. Breeding, 2nd Ed., Prentice Hall, 1992
Available at the Smart Integrated Systems Laboratory
References
Wai-Kai Cheng (Editor). Logic Design. CRC Press,
ISBN: 0-8493-1734-7, 2003.
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4. Introduction to Digital Systems
What is a digital system?
Why are digital systems so pervasive (to be present
everywhere)?
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Microelectronics / VLSI Circuits Design
Why is Microelectronics / VLSI Circuits Design important?
Integrated Circuits (ICs) can be found in any applications
High income 33 973M US$
20 137M US$
8 137M US$
[LaPedus - EETimes]
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5. Examples
Digital TVs
(Multimedia)
WiFi routers MP3 Players
(Communication) (Multimedia)
VLSI Systems
(Systems-on-Chip)
Mobile phone
(Telecoms, Multimedia)
Washing machine
(Customer Electronics)
Automobile applications
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- What is a digital system?
A system that processes discrete information
Discrete entities may represent anything
from simple arithmetic integers, letters of the alphabet, or other abstract
symbols … to values for a voltage, a pressure, or any other physical
quantities.
What these entities represent is not important in processing of the
information.
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6. - What is a digital system?
“A digital system is one that accepts as input digital information
representing numbers, symbols, or physical quantities,
processes this input information in some specific manner,
and produces a digital output.”
Digital Digital
inputs Digital System outputs
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- What is a digital system? (cont’.)
Computer applications
The computer is required to process information related to physical
quantities (pressure or temperature).
Computer Nature: physical quantities
Discrete (digital) quantities Continuous variables (analog quantities)
Physical quantities & computer
Nature ??? ??? Nature
(analog) (analog)
Computer (digital)
Physical quantities must be converted to a digital form !!!
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7. - What is a digital system? (cont’.)
Thermocouple in an analog system
How does this thermocouple be used in a digital system?
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- What is a digital system?
Converting a physical quantity to a digital form
Physical quantity voltage/current (by a transducer)
(coming energy in one form to going energy in another form)
Ex.: thermocouple (temperature transducer)
Output voltage is proportional to the temperature
Voltage/Current Digital form (by an analog-to-digital converter)
Analog Analog
ADC
ADC Computer
Computer DAC
DAC
quantities quantities
(voltage, current…) (voltage, current…)
(‘0’ & ‘1’)
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8. Parallel-comparator ADC converter
2-bit parallel-comparator ADC use 3 parallel
comparators
Use resistors to divide voltage in order to
provide reference voltages to comparators
Full-scale voltage equals VMax (the voltage
at the top resistor)
Incoming voltage is provided to non-invert
input of comparators
Outgoing value at the output of a
comparator gets ‘high’ when its incoming Ex.: VIN = 2.6 Volt
voltage is higher than its reference voltage A3: Low
A2: High
A1: High
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Examples
Monitoring the environment for the developer used on a
photographic processing lab
We must to measure the temperature of the developer
Then, use the results to turn on/off a heating element
Heater
H1
S
S
Monitoring & Control
Photographic
Photographic System
processing
processing
Lab
Lab
S
S
H2
Heater Sensors
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9. Examples (cont’.)
ATM (Automatic Teller Machine)
We must to measure the temperature of the environment surrounding
ATMs
Then, use the results to turn on/off air-conditioners
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- Why are digital systems so pervasive?
Flexibility
Reliability
Cost
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