Merits and Limitation of Digital Techniques:
Merits
1.Digital systems are easier to design as the circuits employed are switching circuits,where exact values of voltage or current are not important,only the range(HIGH or LOW),in which they fall,is important.
2.Storage of information is easier as it is accomplished by special switching circuits that can latch into information and hold it for as long required.
3.Greater accuracy and precision as digital systems can handle as many digits of precision is usually limited to three or four digits because the values of voltage and current directly depend on the values of circuit components.
4.Programmable operation as the digital system can be easily designed for operation controllable by a set of stored instruction called a program.
Analog systems can also be programmed,but the verity and complexity of the available operations is severely limited.
5.Digital circuits are less affected by noise as spurious fluctuations in voltage (noise) are not as critical in digital systems because the exact value of voltage is not important,as long as the noise is not large enough to prevent distinguishing a HIGH from a LOW.
Limitations
There is really only one major drawback of using digital techniques and that is due to the fact that the real world is mainly analog.
Most physically quantities are analog in nature and these quantities are often the inputs and outputs that are monitored,operated on and controlled by a system.Some examples are pressure,position,velocity,temperature,liquid level and so on. We are in the habit of expressing these quantities digitally,such as when we say that the velocity is 5.2m/s ;but we are really making a digital approximation to an inherently analog quantity.
Merits
1.Digital systems are easier to design as the circuits employed are switching circuits,where exact values of voltage or current are not important,only the range(HIGH or LOW),in which they fall,is important.
2.Storage of information is easier as it is accomplished by special switching circuits that can latch into information and hold it for as long required.
3.Greater accuracy and precision as digital systems can handle as many digits of precision is usually limited to three or four digits because the values of voltage and current directly depend on the values of circuit components.
4.Programmable operation as the digital system can be easily designed for operation controllable by a set of stored instruction called a program.
Analog systems can also be programmed,but the verity and complexity of the available operations is severely limited.
5.Digital circuits are less affected by noise as spurious fluctuations in voltage (noise) are not as critical in digital systems because the exact value of voltage is not important,as long as the noise is not large enough to prevent distinguishing a HIGH from a LOW.
Limitations
There is really only one major drawback of using digital techniques and that is due to the fact that the real world is mainly analog.
Most physically quantities are analog in nature and these quantities are often the inputs and outputs that are monitored,operated on and controlled by a system.Some examples are pressure,position,velocity,temperature,liquid level and so on. We are in the habit of expressing these quantities digitally,such as when we say that the velocity is 5.2m/s ;but we are really making a digital approximation to an inherently analog quantity.
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