Analogue and Digital Electronics

 

ANALOGUE AND DIGITAL ELECTRONICS

Analogue quantity is the one having continuous values. Therefore analogue signal is a continuously variable electrical or physical quantity. Most of the quantities that we deal in physical world are analogue quantities. There is an infinite amount of colors to paint an object (even if the difference is indiscernible to our eye), there is and infinite number of tones we can hear, and there is an infinite number of smells we can smell. The commo  theme among all of these analog signals is their infinite possibilities. Digital system on the other hand, operate on discrete digits that represented numbers, letters, or symbols. They deal strictly with ON and OFF states, which we can represent by 0 s and 1 s.

So why do we need to use digital representations in a world that is naturally analog? The answer is that if we want an electronic machine to interpret, communicate, process and store analog information, it is much easier for the machine to handle it. If we first convert the information to a digital format. The conversion from one analogue to digital is achieved through circuit known as analogue to digital convertor and convertor back to analogue signals by digital to analogue converter.

A digital value is represented by a combination of ON and OFF voltage levels that are written as a string of 1s and 0s.