19
|
Define : Multiplexer and
Demultiplexer
|
Multiplexer
· It
is a logic circuit which accepts several data inputs and allows only one of
them at the output.
De
– multiplexer
· It
is inverse process of Multiplexer.
· It
is a logic circuit which accepts one data input and allows several data at
the output.
|
|
20
|
Explain the term : Comparator
|
Comparator
· It
is a logic circuit that compares two input quantities and generates a
specific output quantity.
|
|
21
|
Describe the function of code
converter
|
Function of code
converter
· The
function of the code converter is to converts information coded in one form
into other form.
|
|
22
|
Describe the function of counter
|
Function of counter
· The
function of the counter is to count number of input pulses. It can also
perform frequency division.
|
|
23
|
Describe the function of register.
|
Register
· They
are digital circuits used for temporary storage and shifting of data. They
are made of flip flops.
|
|
24
|
Which are the methods for
transmission of data in the digital circuits?
|
Data
transmission
· There
are two methods of data transmission : Parallel and Serial
|
|
25
|
How the Parallel and Serial data
transmission distinguish each other?
|
Parallel
data transmission
· All
the bits are transmitted simultaneously.
· Faster
data transmission
· Data
transmission costly
· Numbers
of lines requires between transmitter and receiver are more
Serial
data transmission
· All
the bits are transmitted bit – by – bit.
· Only
one line requires between transmitter and receiver
· Data
transmission simple, cheaper
· Slower
data transmission
|
|
26
|
Explain the term : Substrate or Chip
|
Substrate
· It
is a single piece of semiconductor material.
|
|
27
|
Describe the advantages and
disadvantages of integrated circuits ( ICs )
|
Advantages
of ICs
· Low
power requirement
· Low
cost
· Small
size
· Higher
reliability
Disadvantages
of ICs
· Cannot
handle large voltage or current
· The
electrical equipments like transformers, large capacitor, inductors and
precision resistors does not implements in the IC.
|
|
28
|
Compare linear ( Analog ) ICs and
digital ICs
|
Analog
ICs
· The
operation of the analog ICs depends upon external components.
Digital
ICs
· It
is a collection of resistors, diodes, transistors and other semiconductor
devices on single chip.
· The
operation of the digital ICs not depends on external components.
· The
output is obtained if the input is given. The output may be logic 0 or 1.
|
|
29
|
Explain the term : Microprocessor
|
Microprocessor
· It
is a LSI / VLSI device which can be programmed to perform various arithmetic
and logic function and processing of data.
|
|
30
|
What is meaning of architecture of
Microprocessor.
|
Architecture
· It
is defined as an arrangement of circuits within the Microprocessor.
|
|
31
|
Explain the term : Bus in the
Microprocessor
|
Bus
· It
is defined as the interconnection or paths of single flow.
|
|
32
|
Explain the term : Program
|
Program
· It
is defined as set of instruction which computer has to be performing.
|
|
33
|
Explain the term : Micro computer,
Minicomputer and Main frame
|
Micro
computer
· They
are the smallest type of computer which consists of several IC chip including
memory chips, microprocessor chip, input – output interface chip, keyboard,
video display etc.
Minicomputer
· The
size of minicomputers is larger than the microcomputers.
· They
are used in research laboratories, industrial control system etc.
· They
are faster than the micro computer.
· They
have also more processing capabilities than the microcomputers.
Mainframe
· They
are the largest computer.
· They
include magnetic disk units, card punchers and readers, keyboards, printers
etc.
· They
are generally used in the engineering problems, data oriented business.
|
|
34
|
What is meaning of Package in the
IC?
|
Package
· The
digital IC is enclosed in ceramic package or protective plastic from which
pins are extended for connection ICs to other device.
· There
are two types of packages ( 1 ) Flat package and ( 2 ) Dual in line package (
DIP ).
|
|
35
|
Explain the terms : SSI, MSI, LSI,
VLSI, ULSI
|
Small
scale integration ( SSI )
· Less
than 12 gates on a single chip
· Logic
gates and flip flops
Medium
scale integration ( MSI )
· Numbers
of gates are 12 to 99 on a single chip
· Decoders,
encodes, flip-flops, registers, multiplexers
Large
scale integration ( LSI )
· Numbers
of gates are 100 to 99,999 on a single chip
·
Small microprocessors and
memories
Very
large scale integration ( VLSI )
· Numbers
of gates are 10,000 to 99,999 on a single chip
· Large
microprocessors and memories
Ultra
large scale integration ( ULSI )
· More
than 1,00,000 gates on a single chip
· Large
microprocessors and memories
|
|
36
|
Which logic families are used for
fabrication of digital ICs?
|
The
digital ICs are fabricated using ECL, TTL, IIL, MOS and CMOS technologies.
|
You may also
like :
No comments:
Post a Comment