Is any digital signal comprised of one or more discrete signals?

1. Are all digital signals discrete?
2. What comprises a digital signal?
3. Can a signal be both discrete-time and digital?
4. What are the discrete states of digital signals?

Are all digital signals discrete?

What Are Digital Signals? Unlike analog signals, digital signals are not continuous, but signals are discrete in value and time. These signals are represented by binary numbers and consist of different voltage values.

What comprises a digital signal?

A digital signal encodes data as a sequence of discrete values. A digital signal can only have one value from a finite set of possible values at any given time. Many physical quantities can be used to represent information in digital signals like variable electric current or voltage.

Can a signal be both discrete-time and digital?

A discrete time signal is quantised in time only, a digital signal is quantised both in time and amplitude. Neither a continuous amplitude discrete-time signal, nor a quantized discrete-time signal are digital signals.

What are the discrete states of digital signals?

A digital signal is a type of continuous signal (discrete signal) consisting of just two states, on (1) or off (0).