Analog and Digital Signal transmission

Analog and Digital signals


Analog signals


Analog signals are continuous in nature, that means analog data refers to information that is continuous in nature such as voltage, pressure, etc.
E.g. Analog clock works on continuous data to represent the time.

Digital signals


Digital signals are discrete (discontinuous) in nature that means digital data refers to information that is discontinuous in nature.
E.g. Digital clock works on discreate data to represent the time.

Difference between Analog and Digital signals


Analog signals Digital signals

An Analog signal is a continuous signal which represents the physical measurement

Digital signals are discrete-time signals generated by digital modulation

Analog signals are denoted by sine waves

Digital signals are denoted by square wave

Analog signal examples are a human voice in the air, analog electronic devices 

Digital signal examples are computers, DVDs, and other digital electronic devices

Analog signals are affected by noise

Digital signals are less affected by noise 

Analog hardware is not flexible

Digital hardware is flexible 

Best suited for audio and video transmission

Best suited for computing and digital electronics 

Low cost and portable 

The cost is high and cannot be easily portable