Difference Between Analog and Digital Signals

 

Basis for Comparison	Analog Signal	Digital Signal
Nature	Continuous with time.	Discrete sets at specific time.
Type of Waveform	Sinusoidal waves	Square waves
Representation
Information carried	Continuous range of values.	Discrete value i.e., 0 and 1.
Noise Susceptibility	More	Comparatively less
Processing offered	Easy	Quite complex
Signal polarity	Positive as well as negative	Only positive
Signal encryption	Not required	Required
Bandwidth	Low	Comparatively high
Power required for transmission	More	Less in comparison to analog signal
Rate of data transmission	Slow	Quite fast
Parameters associated	Amplitude, frequency, phase, etc.	Bit rate, bit interval, etc.
Accuracy of information	More	Comparatively less
Examples	Human voice, vision.	Computer data transmission and reception, transmission of signals through cables like telephone.