Slide 1 1 KỸ THUẬT SỐ HCMC University of Technology and Education Faculty of Electrical & Electronic Engineering CHƯƠNG 1 GIỚI THIỆU VÀ MÃ Assoc Prof Nguyen Thanh Hai HCMC University of Technology and[.]
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HCMC University of Technology and Education
Faculty of Electrical & Electronic Engineering
CHƯƠNG 1:
GIỚI THIỆU VÀ MÃ
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Digital Systems Chương 1: Giới Thiệu và Mã Chương 2: Đại Số Bool và Cổng Logic Chương 3: Logic Tổ Hợp
Chương 4: Logic Tuần Tự Chương 5: Họ TTL-CMOS Chương 6: Mạch Dao Động Chương 7: Bộ Nhớ
Chương 8: Chuyển Đổi ADC
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What is analog
Representation?
What is digital Representation?
Introduction
analog signal
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Introduction
Limitations of Digital Techniques
-The real world is mainly analog: Most physical quantities
are analog in nature such as velocity, temperature, liquid level, flow rate etc.
-One analog system uses only inputs and outputs to monitor
- Input-output conversion
Measuring device
digital converter
Analog-to-Digital processing
analog converter
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Introduction
Some Devices/Equipments
Digital circuit
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Computer,
Digital or
analog ?
LCD TV, Digital or analog ?
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CT scanner or MRI
CT scanner or MRI
X-ray machine
Biomedical appliances
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Introduction
Telephone exchange
Telecom appliances
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Introduction
Stepper motor driver
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Introduction
Scanned
keypad encoder
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Application 1:
A typical CD-ROM can store 650 megabytes of
digital data Since 1 mega = 2 20 , how many bits of data can a CD-ROM hold?
Solution:
650 x 2 20 x 8 = 5,452,595,200 bits
2.8 Applications
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Application 2:
A small process-control computer
uses octal codes to represent its
12-bit memory addresses.
a How many octal digits are
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Application 3:
A typical PC uses a 20-bit
address code for its memory
a 20/4 = 5 hex digits
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Application 4:
Most calculators use BCD to
store the decimal values as
they are entered into the
keyboard and to drive the digit
displays.
a If a calculator is designed to
handle 8-digit decimal
numbers, how many bits does
this require?
b What bits are stored when the
number 375 is entered into the
calculators?
b 375 10 converts to
0011 0111 0101 (BCD) Solution:
a 8 x 4 = 32 bits
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Series transmission between two
computers
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Introduction
The End