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The distinction between Analog and Digital (Signals & Systems)
Sr.No.
Analog Signals/Systems
Digital Signals/Systems
1
Analog Signals are continuous signals.
It is the one which changes between two discrete levels of Voltage.
2
It is having an infinite set of possible values.
It can have finite values.
3
Signal Generators, Transducers are some of the sources used to generate analogue signals.
Computers, A to D Converters etc. are the sources of digital signals.
4
These are described by parameters like Amplitude, Time Period, Frequency, and Phase.
Digital Signals are described by Bit Interval (instead of Time Period) & Bit Rate (instead of Frequency).
5
These are less accurate.
These are accurate & precise as compared to analogue systems.
6
Storage of information is not possible.
Storage is possible, e.g. in computers, USB etc.
7
These are very much affected by noise.
These are less prone to noise (have much more immunity).
8
These are difficult to design.
These are easier to design.
9
These have more memory due to which storage is not possible.
These have memory.
10
These cannot be fabricated on IC’s.
These can be fabricated on IC’s.
11
The Material used to design analogue systems is prone to wear & tear e.g. spring’s elasticity decreases day by day. Thus these have lesser (or small) life.
Digital systems have larger life as compared to analogue systems.
12
Programming is not possible.
A set of instructions can program digital systems.
13
Data is displayed on Analog Meters etc.
Data is displayed on LCD’s, LED’s, Nixie Tubes etc.
14
e.g. Filters, Amplifiers, Power Supplies, Signal Generators etc.
Counters, Registers, Microprocessors, Computers etc.
