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Difference Between Analog and Digital Signals

 


Basis for ComparisonAnalog SignalDigital Signal
NatureContinuous with time.Discrete sets at specific time.
Type of WaveformSinusoidal wavesSquare waves
Representationanalog representationdigital representation
Information carriedContinuous range of values.Discrete value i.e., 0 and 1.
Noise SusceptibilityMoreComparatively less
Processing offeredEasyQuite complex
Signal polarityPositive as well as negativeOnly positive
Signal encryptionNot requiredRequired
BandwidthLowComparatively high
Power required for transmissionMoreLess in comparison to analog signal
Rate of data transmissionSlowQuite fast
Parameters associatedAmplitude, frequency, phase, etc.Bit rate, bit interval, etc.
Accuracy of informationMoreComparatively less
ExamplesHuman voice, vision.Computer data transmission and reception, transmission of signals through cables like telephone.

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