DIGELEC1 Flashcards

1
Q

branch of electronics that deals with digital format of data and codes.

A

digital electronics

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2
Q

digital stand for

A

digit

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3
Q

digital electronics basically has two conditions which are possible

A

0 (Low Logic)
1 (High Logic)

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4
Q

“1” as true and “0”as false are called

A

bit

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5
Q

Group of bits are called

A

byte

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6
Q

Digital electronic circuits are usually made from large assemblies of

A

logic gates

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7
Q

used to convert the digital information in your computer to analog signals for your device and convert analog signals to digital information for your computer.

A

modem

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8
Q

This year the use of electronic diodes, and while these where better but they were unreliable.

A

1940

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9
Q

In this year the prototypes of the computer were constructed from mechanical switches (vacuum tubes) and relays. These were comparatively slow, large, produced a great deal of heat

A

1930

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10
Q

The next stage was the result of the development in ____ of the transistor which was much smaller, faster and cooler. Simple transisors were replaced by intergrated circuits and that got smaller and smaller and finally depos silicon to be put into a chip.

A

1947

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11
Q

What type of wave does an analog have

A

continuous

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12
Q

What type of wave does a digital have

A

discrete

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13
Q

Can be process, store and transmit data more efficiently but can only assign separate values to each point

A

digital systems

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14
Q

Most Natural quantities (such as temperature, pressure, light intensity,…) are

A

Analog quantities

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15
Q

The branch of mathematics involving digital logic is named

A

boolean algebra

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16
Q

The building blocks used to create digital circuits are

A

logic gates

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17
Q

3 basic logic gates

A

AND, OR, NOT

18
Q

the method of converting a decimal number to a binary number is called

A

coding

19
Q

is a method for the description of every decimal digit with respect to its binary code.

A

BCD

20
Q

Types of Binary or Digital Codes

A
  • Numeric weighted code
  • Special binary codes or non-weighted code
21
Q

used for security purposes so that in case the message has been detected, it may not be deciphered or decoded

A

Codes

22
Q

How many code groups are in the BCD system

A

10 (0-9)

23
Q

IC is produced using VLSI by two technologies.

A
  • Application Specified integrated circuit
  • Field Programmable Gate Array
24
Q

expression of every decimal digit (0-9) by means of a 4 – bits binary code

A

BCD

25
Q

represents the binary weights of these four bits

A

Code 8421

26
Q

The position of the 0 or 1 in a binary number indicates its value within the number.

A

Value/weight

27
Q

Formula for determining the largest value that can be represented by a given number of places in base 2

A

Highest number = 2^n - 1

28
Q

Decimal to Any

A

Division

28
Q

Any to Decimal

A

Multiplication

29
Q

these are the set of values used to represent different quantities

A

Number system

30
Q

4 types of number system

A
  • Binary
  • Decimal
  • Octal
  • Hexa
31
Q

Commonly known as decimal number system

A

base 10

32
Q

Commonly known as binary number system

A

base 2

33
Q

is the process of taking data and representing it with
discreet bits of information

A

digital encoding

34
Q

How many bits does an octal have

A

3

35
Q

He suggested the base 8 and coined the term octal

A

James Anderson

36
Q

Arithmetic operation of AND & OR

A

Multiplication, Addition respectively

37
Q

isolates conventional gates from other circuitry.

A

buffer

38
Q

what is the third state of a buffer called

A

high-impedance

39
Q

Exclusive OR is only true when

A

both inputs are different

40
Q

Exclusive NOR is only true when

A

both inputs are same