What is difference between digital and analog?

Question

what is the meaning of digital wherever it is used?

Answer 1

Average human's answer, here it goes.

Digital is the high-tech looking numbers stuff. It's powered by batteries or solar energy and it doesn't work the ordinary way.

Analog means doing things old school, the basics.

AH well, for example, the thermometer. A digital thermometer doesn't use mercury. It doesn't work that way.

An analog meter is the type that moves a number by a number, when the smallest unit reaches 9, the number beside it goes up one number.

Sorry, I'm not so good at explaining.

Answer 2

analogue is when a wave is taken and kept in its exact form, for example the tv.

the wave is taken and sent through the cable.

this is the wave  :

,_,--,_,--,_,--,

each wave carreis a piece of data, when it travels a long way the wave looses some of its strenth as the energy spreads out, so the wave will turn into something like this:

,_ - _,- -, _ ,-,

thats why when you talk on the phone it doesnt sound clear and deosnt sound like the exact voice of the person.

this is also why when you are watching normal tv or cable it can be abit unclear as the signals. if you move around the wire it changes as some waves are not caught propoerly so it isnt clear.

digital devices get the waves and pot it on a graph, the

co-ordinates are then used, so the co-ordintaes are sent, so in this way the graph can be wave can be plotted easily and it is more accurate.

5|

4|

3|  _ ,--, _ ,--,

2|

1|  _  _  _  _  _  _  _  _

   ..  1    2   3   4   5   6

so instead of the whole wave being sent it sends the co-ords

so the it would be

(1, 2.5)

(2, 3)

(3, 2.5)

(4, 3)

(5, 2.5)

(6, 3)

the numbers are sent as binary

if the wave is sent it can weaken so this is sent instead and is plotted out so it is more precise, this is used in every digital device whether it is a tv or radio or camera.

Answer 3

In analog technology, a wave is recorded or used in its original form. So, for example, in an analog tape recorder, a signal is taken straight from the microphone and laid onto tape. The wave from the microphone is an analog wave, and therefore the wave on the tape is analog as well. That wave on the tape can be read, amplified and sent to a speaker to produce the sound.

In digital technology, the analog wave is sampled at some interval, and then turned into numbers that are stored in the digital device. On a CD, the sampling rate is 44,000 samples per second. So on a CD, there are 44,000 numbers stored per second of music. To hear the music, the numbers are turned into a voltage wave that approximates the original wave.

The two big advantages of digital technology are:

    * The recording does not degrade over time. As long as the numbers can be read, you will always get exactly the same wave.

    * Groups of numbers can often be compressed by finding patterns in them. It is also easy to use special computers called digital signal processors (DSPs) to process and modify streams of numbers

Answer 4

digital is HITECH

ANALOG is 1947 old c**p