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Digital circuits are used most extensively when compared to its opponent ,its none other than analog circuits.Generally we consider a device or circuit in the sense we use widely use by considering different characteristics like speed,accuracy,efficiency,mechanical strength,environmental conditions,errors,noise,performance in different aspects,cost etc.

When we consider an analog circuit, it consumes large power for transmitting any signal.We have different types of transmissions even in analog which consumes power in different ranges.We say a digital circuit is better when we take power(consumption) into account.

The probability of error is also less because we have only two states that is either 0 or 1 , for any information we transmit the combination of 0's and 1's by using proper sampling techniques i.e; the sampling frequency should be twice of the message signal frequency(max). In equation

fs =2f ;

fs=sampling frequency;

f= maximum operating frequency of message signal.

When we consider analog the signal is continuous and while transmitting we have more chances for error occurence.So we prefer a digital circuit.

One more factor is noise.The source of noise is less in digital circuits and signal to noise ratio is also good in digital circuits.Accuracy is the main performance characteristic to say that digital circuits are more advantageous.

The above are some of the comparitives to say that digital circuits are widely preferred.

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