Analog Signal

-

ANALOG SIGNAL

ANALOG SIGNAL :-

1.An electrical impulse or an electromagnetic wave which travels a distance to convey a message, can be termed as a signal in communication system.

2.A continuous time varying which represents a time varying quantity can be termed as an Analog signal.Signals which are continuous in time and amplitude are called analog signal

3.An analog signal can take on any value in a specified range of value. As the wave moves from value A to B, it passes through and includes an infinite number of values analog its path.


Advantages of analog signals :- 

1. The main advantages is the fine definition of the analog signal which has the potential for an infinite amount of signal resolution.
2. Compared to digital signal, analog signals are of higher density.
3. Analog signals are best suited for the transmission of the audio and video.

Disadvantages of analog signal :-

1. Most of the analog systems also suffer from generation loss.
2. The effects of noise create signal loss and distortion.
3. The advantages of analog signaling is that any system has noise-i.e, random unwanted variation.

ANALOG TRANSMISSION :-


1. Analog transmission is a means of transmitting analog signals, 

2. To send the digital data over an analog media, needs to be converted into analog signals. there can be following two cases according to data formatting:

Band-pass:- The filters are used to filter and pass frequencies of interested. A bandpass is a band of  frequencies which can pass the filter.
Low-pas:- Low pass is a filter that passes low frequencies signals.

Digital-to-Analog conversion :-

1. The process of changing one or more the attributes of analog signal based on information in digital data is referred to as digital-to-analog conversion. it is also called as the modulation of the digital signal.

2. Depending on whether the amplitude, frequency or phase of the carrier signal id modified. Digital-to- analog conversion is the process of changing one of the characteristics of an analog signal based on the information in digital data. 

 3. The digital-to-analog modulating process, and the resultant analog signal. The digital-to-analog conversion is done by modem. Modem  stands for modulator and demodulator.

4. A modulator use some coding scheme and converts a digital signal into an analog signal and demodulator converts the analog signal back into the digital signal.

5. There are three kinds of digital-to-analog conversions possible as given below :
>. Amplitude shift keying (ASK)
>.Frequency shift keying (FSK)
>.Phase shift keying (PSK)
>. Quadrature Amplitude modulation (QAM)
>. Quadrature phase shift keying (QPSK)

Analog-to-analog conversion :-

1. Analog signals are modified to represent analog data. This conversion is also known as Analog modulation. Analog modulation is required when band pass is used.

2. Analog to analog conversion can be done in following three ways :-

>.Amplitude modulation (AM)

>. Frequency modulation (FM)

>. Phase modulation (PM)


THANK YOU VIEWER 

THIS IS PUBLISHED BY.....

ANKESH KUMAR

Email-id-  ankeshk765@gmail.com



Comments

Post a Comment

Popular posts from this blog

Introduction of Digital computer

-
Image
INTRODUCTION Digital computer concept:- 1. Digital computers are designed to store, process and communicate information in digital form. 2. Digital computer is any of a class of digital devices capable of solving problems by processing information in discrete form. 3. It is used for processing data represented by discrete, localized physica signals, as the presence or electic current. 4.The main three components of digital computer:- >input:- The user gives a set of input data through input devices. >Processing :- The input data is processed with the help of CPU by well defined and finite sequence of step. >Output : - Some data available from the processing step are output to the user. TYPE OF DIGITAL COMPUTER :- 1.Microcomputer/Desktop computer 2.Minicomputer 3.Mainframe computer 4.Supercomputers Microcomputer :- 1.Microcomputer is also called a personal computer or desktop computer. 2.It includes a microprocessor, memory,...
Read more

INTRODUCTION OF DBMS

-
What is Database :- The database is a collection of inter-related data which is used to retrieve, insert and delete the data efficiently. It is also used to organize the data in the form of a table, schema, views, and reports, etc. For example: The college Database organizes the data about the admin, staff, students and faculty etc. Using the database, you can easily retrieve, insert, and delete the information. DBMS (Database Management System):- Database management system is a software which is used to manage the database. For example: MySQL, Oracle, etc are a very popular commercial database which is used in different applications.DBMS provides an interface to perform various operations like database creation, storing data in it, updating data, creating a table in the database and a lot more.It provides protection and security to the database. In the case of multiple users, it also maintains data consistency. DBMS allows users the following tasks:- Data Definitio...
Read more

Introduction to cache memory

-
Image
Cache Memory in Computer Organization Cache Memory  is a special very high-speed memory. It is used to speed up and synchronizing with high-speed CPU. Cache memory is costlier than main memory or disk memory but economical than CPU registers. Cache memory is an extremely fast memory type that acts as a buffer between RAM and the CPU. It holds frequently requested data and instructions so that they are immediately available to the CPU when needed. Cache memory is used to reduce the average time to access data from the Main memory. The cache is a smaller and faster memory which stores copies of the data from frequently used main memory locations. There are various different independent caches in a CPU, which stored instruction and data. Levels of memory: Level 1 or Register – It is a type of memory in which data is stored and accepted that are immediately stored in CPU. Most commonly used register is accumulator, Program counter, address register etc. Level 2 or...
Read more