Difference between Analog and Digital

In the field of signals used to transmit signals, we can find two different ways, analog and digital, both use electricity, but in different ways. In analog technology, the electrical signals are converted into electrical impulses of varying amplitude and in digital technology, it transforms them into data in binary mode (0 and 1), where each bit represents two different amplitudes.

Analog Vs Digital

ConceptIt transforms information, video, or audio into electrical signals that are then converted into electrical pulses with different amplitudes.The information is translated into a binary format made up of zeros and ones, each bit of information represents two different amplitudes.
EtymologyIt derives from the Latin analŏgus, used to define something by establishing a comparison or analogy with another similar thing.It comes from the Latin digitalis, which means “relative to the fingers” and is related to entering information with the fingers.
FunctioningIt is a continuous signal. To indicate physical quantities such as pressure, intensity, and power. It is also used to indicate hydraulic and thermal signals.They are discrete-time variables that are generated by digital modulation. A discrete variable is one that only takes values ​​that belong to a set, it does not take those that are outside of it.
Wave typesSinusoidal waves.Square waves.
TechnologyIt records the waves as they are emitted.Convert the waves into numbers and record them.
RepresentationUse continuous values ​​to represent information.They use discrete or discontinuous values ​​to present the information.
Data transmissionDuring transmission, the analog signal deteriorates due to noise.It is immune to noise and deterioration during transmission and writing/reading.
NoiseIts accuracy is affected by noise.It is not affected, the noise acts as an analog signal.
FlexibilityAnalogous systems are not flexible.Digital systems are flexible during the execution process.
ExampleThe human voice through a microphone is an analog signal.You can find them on computers, CDs, DVDs, storage devices, and more.
ApplicationsThermometers are analog technology.Computers are digital technology.
ApplicationsAnalog signals are only read by analog equipment, they are more useful for audio and video transmission.It is most useful in computers and their components.
StorageThey are stored as signal waves.They are stored as binary bits.
PowerAnalog equipment requires more power.They don’t require a lot of power.
costIt is inexpensive and portable.It is expensive.
BandwidthSignal processing is done in real-time and consumes fewer bits.Real-time signal processing is not guaranteed and consumes more bits.
MistakesThey have a scale that is reduced so it usually presents errors.They do not present observational errors such as parallax and approximation errors.


It is any continuous signal for which the character of a variable represents a qualitative characteristic. Use a set of values ​​to represent the information.

Analog signals suffer from alterations that cause communication errors. The copies in the communication are not as good quality as in the original.

If you want to represent a variable analog value digitally, quantization errors can occur.


Use continuous-discrete values. Represent information discreetly, with letters and numbers, or continuously, with sounds, images, or other indicators.

Employs specific timing sequences to determine communication. In addition, it requires that the language be understood by both who sends the message and who receives it. The symbols used must have a specific meaning.

Copies of digital communications are as good quality as the original.

Differences between analog and digital

  • Analog technology is cheaper than digital.
  • Data in digital technology is converted into binary code and then transformed into its original form on the receiving equipment.
  • Analog technology represents information with the signs of human communication.

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