| 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. |
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