What is the difference between continuous, discrete, analog and digital signal?

1. What is the difference between continuous signal discrete signal and digital signal?
2. What is difference between continuous and analog signal?
3. What is the difference between discrete and analog signals?
4. Is analog continuous and digital discrete?

What is the difference between continuous signal discrete signal and digital signal?

Continuous time signal: X-axis (time) is continuous and Y-axis (amplitude) may be continuous or discrete. Digital signal: Y-axis (amplitude) is discrete and X-axis (time) may be continuous or discrete. Analog signal: Y-axis (amplitude) is continuous and X-axis (time) may be continuous or discrete.

What is difference between continuous and analog signal?

A continuous signal cannot be stored, or processed, in a computer since it would require infinite data. Analog signals must be discretized (digitized) to produce a finite set of numbers for computer use. When analog signals are brought into a computer, they must be made discrete (finite and countable).

What is the difference between discrete and analog signals?

Discrete signals are simply on or off, whereas analog signals vary. PLCs are responsible for collecting data from input signals and sending the information through output signals to control devices in order to perform specific functions.

Is analog continuous and digital discrete?

Analog signals are continuous in nature, whereas digital signals are discrete. Analog signal wave type is sinusoidal, whereas a digital signal is a square wave.