Why use digital circuit?

Answer 1

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.

Answer 2

the big advantage of Digital electronics devices are that they work on binary number system so the error or noise is less generated . and also a merit is that the storage of digital data is very easy which is needed in this generation. also a fact is that they are very fast in operation.

Answer 3

Because it is easier to design something that reliably identifies just 2 different states on one line than more states. Using 2 states you can encode values using binary and values of any precision desired can be encoded by using more parallel lines (or serial time periods).

Analog signals are limited to 2 to 4 decimal digits of precision in most cases and are sensitive to noise, drift, and many other problems that can corrupt the data that digital signals are immune to.

Even if digital signals do get corrupted, it is possible to add extra bits that can be used to detect and in some cases even correct the error, allowing reliable operation with "marginal equipment" that would make any analog signal completely unrecoverable and useless.