Hello,

Analog Signal

• An analog signal is a continuous wave that changes over a period of time, it has no fixed range and is described by amplitude, period or frequency and phase.Human voice is an example of this.
• Represented by a sine wave, this is more prone to distortion and transmit data in the form of waves.

Digital Signal

• It's a discrete wave that carries information in binary form, it has finite number and is described by bit rate and bit intervals.
• The signals that are used for transmission in a computer are digital signal.
• Represented by square waves, this is less prone to distortion.

Hii aspirants

let me clear your doubt.

analog system is a continous wave system in which wave keeps on changing over a given period of time. where as digital signal is discrete in nature. analog system  is represented by sine wave and digital system is represented by square wave.

I hope my answer will help you out

Good luck