What is Digital Signal? Digital vs Analog signal

Digital signals are the basis of modern computers, as the data generated by a computer is digital.  That’s why they are called digital computers, the number of values ​​in a digital signal is limited.

And it is also discrete, its conversion from one value to another is instant digital signals have only two different values ​​or states, which are separated from 0 and 1 respectively.  is shown.  

Both these conditions are expressed by different voltage ranges.

What is Digital Signal? | Digital & Analog Signal | Digital vs Analog signal

Concerning digital signals, we often use two terms, Bitrate and Bit interval, the time is taken to send a single bit is called bit interval.

For example, if we transmit 8 bits of data in a second, then the bit interval will be 1/8 i.e., 0.125 seconds.

The number of bits sent in one second is called the bit rate, here the bit rate is 8 bits per second, which is abbreviated as inches.

Advantages of Digital Signal

Digital systems are easy to design, as switching circuits are used in which the actual value of the signal is not important, but their range (High/Low) is important.

It is easier to store information in digital format. They have high accuracy, and the accuracy can be increased by increasing the number of switching circuits.

The operation can be programmed with the aid of a computer. The impact of noise is less in digital systems. Digital circuit is made on IC (Integrated Circuit).

Detection of errors and connection is possible in digital communication of signals. Digital communication of signals is more secure.

Transceivers have become small, lightweight, and mobile with the help of VLSI (Very Large-Scale Integration) technology. Digital circuits are more reliable.

Defects of the digital system

The significant drawback of digital systems is that most of the quantities in the world are analog, and it is necessary to convert them to digital, only then digital processing is possible.

What is Analog Signal?

An Analog signal is said to be such a signal, which is continuous, that is, smooth, sending our voice from one place to another in a telephone conversation is through analog signals. 

The sine wave is also a good example of an analog signal, Analogous signals have great importance in data communication, data transmission, and computer network connection

Because long-distance data is transmitted through analog signals only.

Analog signals have infinite values ​​and these signals change continuously with time. Sine wave, Triangular wave, etc. are examples of the analog signal.

Analog Signal Vs Digital Signal:

Analog

Due to analog signals, it was possible to take electricity from one place to another in the form of AC all over the world.

Due to analog signals, it was possible to transmit information through electromagnetic waves to the whole earth and outside the earth (satellite).

The analog signal made it possible to transmit information through a medium called electromagnetic waves throughout the earth and beyond the earth (satellite).

Our mobiles are connected only by an analog signal.

Digital

All computers work in the digital signal. due to digital signals, it is possible to store more information in less space.

All mobile phones send and receive signals in analog form, but all other functions inside are done in digital form.

After the digital revolution, the size of many devices has become smaller, and they have also become cheaper, for example, now every mobile has a camera, first T.V.  

Used to be very big and full, but today T.V. Has become thinner and lighter.

All computers work in the digital signal. Digital signals made it possible to store more information in less space.  (Pen drive)

All mobile phones send and receive signals in analog form, but all other work inside is done in digital form.

After the digital revolution, the size of many devices has become smaller and they have also become cheaper.  

For example, now cameras have started coming in every mobile.  The first T.V.  Used to be very big and full, but today T.V.  Has become thinner and lighter.

Also read – What is VoLTE and LTE?

Advantage of Digital Signal

Great noise immunity

Digital signals are quite protective from the noise (other electric signals) present in the environment.

Require less space

Large circuits in a digital chip are absorbed into a small chip.

Less bandwidth

Very little bandwidth is required for digital signals.

Encryption is possible

Encryption means to cloud the data into other codes so that the information reaches only the right “receiver”.

Multiplex

In a digital system, multiple signals can be transmitted by multiplex from the same line.

Very low error rate

Signal can have only two states in digital copy.  ON or OFF (0 or 1 and high voltage or low voltage).  Therefore, the probability of error in the signal is greatly reduced.

Comparison of Analog Signal and Digital Signal

Analog Signal

The output voltage of an analog signal has infinite values. the Analog signal is continuous.

Source of analog signal – signal generator, transducer, etc. examples of analog signals – Sine wave, Triangular wave, etc.

Digital Signal

The output voltage of a digital signal has two levels (Low or High).

The nature of a 2-digital signal is discrete.

Sources of 3-digital signals – computers, etc. Examples of 4-digital signals – binary signals, etc.

Analog System

The system which processes analog signals is called an analog system.

Examples of Analog System

1- Filter,

2- Amplifiers,

3- Signal Generators,

4- Power Supplied.

The accuracy of the analog system is work due to which it is less reliable.

Digital System

The system which processes digital signals is called a digital signal. Both the input and output signals of a digital system are digital.

Examples of digital system   

1- Flip-Flops,     

2- Counter,

3- Microprocessor,

4- Digital Calculators,

5- Computers.

Hope you like this informational post What is Digital Signal and Digital & Analog Signal and Digital vs Analog signal and Difference between analog signal and digital signal.

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