Analog Communication Block Diagram and Working Principle


Communication is a process of exchanging information between two or more individuals using words, signs, or any actions. A communication system has basic three parts sender, receiver, and channel. The sender is who sends the information, the receiver who receives the information, the channel is the way through which information travels with electrical signals. According to the type of the signal, communication is classified into two types - 1. Analog Communication 2. Digital Communication. An Analog communication system is that where the information or data is transmitted through the analog electronic signal. These both types of communication system requires different circuits, devices, and working mechanism. In this article, we are going to learn about the analog communication systems.


Block Diagram of Analog Communication System


Here, you can see the Analog Communication block diagram and its every part.

Analog Communication Block diagram, Block Diagram of Analog Communication System



The important blocks are explained Below,


Source or Information Sender


In a communication system, the source or sender sends the actual information or data. The main objective of a communication system is to properly and how much possible quickly transmit the information sent by the sender and deliver to the receiver. A good communication system provides speed, reliability, accuracy, minimized errors and noise.


Input Transducer


The transducer is a device that covers the physical quantity into electrical quantity. For example, the microphone is an example of a transducer that converts the voice into an electrical signal. In a communication system, the first and main work is to convert all the messages, information, or data into an electrical signal. Because this electrical signal is to be conducted through the whole communication system. The transducer provides a very important major role in a communication system. The main function of the transducer is to convert the message into an appropriate electrical or electronic signal.


Transmitter Circuit


The main function of the transmitter circuit is to make the electrical signal ready for transmission over a long distance. the transmitter circuit includes amplification, modulation, etc. The types of transmitters depend upon the medium through which the signal is to be transmitted. If the signal is to be transmitted through a conductive line or wire then the main role of the transmitter is to amplify the signal. But if the signal is to be transmitted through wireless radio waves then the role of the transmitter is to convert the electrical signal into a radio signal and to amplify the signal. The transmitter circuit uses a carrier signal to mix up with the actual data signal. The carrier signal helps for modulation, security, etc.


Transmission Channel


The transmission channel is the medium through which the signal or information is transmitted over a long distance. The transmission channel may be an electrical conductor, line, or cable, or maybe an optical fiber cable or free space. The electrical conductor transmits the signal in form of the electrical current, the optical fiber cable transmits the signal in form of the light, and the free space transmits the signal in the form of radio waves. Remember that the optical signal is used in digital communication only.


Receiver Circuit


Receiver Circuit is that receives the signals from the transmission channel in form of electrical current or optical signal or radio waves. The main function of the receiver circuit is to receive the signal and remove the noise and convert it into electrical signals. If the receiver receives the signal in from the electrical current then it just removes the noise and extracts the actual data signal if there is a mixed-up signal. If the receiver receives the signal in form of light or optical then it converts the light signal into electrical signals. If the receiver receives the signal in form of a radio wave then it converts the radio signal into electrical signals.


Output Transducer


The main function of the output transducer is to convert the electrical signal into actual information or message in form of sound, picture, or video formats. Speaker, Monitors, or TVs are works as output transducer in an analog communication system.


Destination


At the destination, the receiver is present who actually receives the information or message, or data.



Analog Communication Working Principle


From the above block diagram, you can easily understand the working principle of analog communication system. At first, the sender provides the information in the physical form. The input transducer converts this physical information into electrical signals and sends it to the transmitter circuit for transmission. The transmitter circuit makes ready the signal for the long-distance transmission. The transmission channel transmits the data over a long distance. The receiver circuit receives the information and converts it into electrical signals. The output transducer converts the electrical signal into the actual physical form of the message. At the destination, the receiver finally receives the message.


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Analog Communication Block Diagram and Working Principle Analog Communication Block Diagram and Working Principle Reviewed by Author on 11/16/2021 Rating: 5
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