The term Analog is a taken from “Greek” word “analogos”. Analog signals are a representation of time-varying quantities in a continuous signal.
Analog signals work with natural phenomena and physical values like frequency, earthquake, volcano, the flow of water, speed of wind, weight, lighting etc.
Characteristics of Analog Signal
- It works on continuous data.
- It is used to measure natural or physical values.
- It is specific to a particular task. Hence it is not versatile.
- Accuracy of analog signal is not high in comparison of digital signal.
- Analog signal output form is like Curve, Line or Graph, so it may not be meaningful to all.
The Digital signal having a discrete set of values. Digital signals are a series of ONs and OFFs (represented by 1s and 0s).
These can be voltages going from a high (one) value to a low (zero) value or flashes of light. It is usually encoded into binary in order to carry out the information.
Characteristics of Digital Signal
- Digital Signal are continuous signals
- Digital signal can be processed and transmitted more efficiently and reliable than analog signal.
- Digital signal are versatile, we can use digital signals widely than analog signals
- Accuracy of digital signal is higher than that of analog signal
- Digital signal based on binary form 0’s and 1’s