We’re rewarding the question askers & reputations are being recalculated! Read more.

A continuous signal or a continuous-time signal is a varying quantity (a signal) whose domain, which is often time, is a continuum.

In case of a continuous signal, the function's domain is an uncountable set. The function itself need not be continuous. To contrast, a discrete time signal has a countable domain, like the natural numbers.

Source: Wikipedia.

history | excerpt history