[SOLVED] analog Vs digital system

analog Vs digital systems

why digital systems are less affected by noise as compared to analog systems?
why analog systems have more power consumption than digital systems?

Re: analog Vs digital systems

syeda amna said:

why digital systems are less affected by noise as compared to analog systems?

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Because there is no other logic levels than 0 or 1. A little noise (ripple) on a 5V input probably wont make input of a logical circut to wonder if that may means 0 instead.

syeda amna said:

why analog systems have more power consumption than digital systems?

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What kind of system? That is not neccesarily true. Just think about a gamingt computer. It often consumes houndreds of watts while gaming. There is no analog equivalent to videogames, so it cannot be compared.

Re: analog Vs digital systems

thanks for your reply

Prototyp_V1.0 said:

What kind of system? That is not neccesarily true. Just think about a gamingt computer. It often consumes houndreds of watts while gaming. There is no analog equivalent to videogames, so it cannot be compared.

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actually i have read about analog communication systems that they consume more power than digital communication systems? is it true?

syeda amna,
It is true that it is not always that digital circuits consumes less than analog circuits. This depends on the how complex is your digital and anolog circuit.
But in order to explain the origin of your assumption, let me add something:

Neglecting leakage, the main component of power consumption in digital circuits comes from the switching (current from VDD to ground, and to charge/discharge capacitors). This component only happens during the clock transitions.
In another side, analog circuits are always conducting. For this reason, one can think that analog circuits consumes more than digital.

I hope it is clear now.
Regards,

It is clear now. thanks for your reply