Signal and System

A signal is a description of how one parameter varies with another parameter. For instance, voltage changing over time in an electronic cir...

Most digital systems use the simplest possible type of signal which has just two values. This type of signal is called a logic signal becaus...

Digital systems process digital signals which can take only a limited number of values (discrete steps), usually just two values are used: ...

Analogue systems process analogue signals which can take any value within a range, for example the output from an LDR (light sensor) or a m...

Advantages The main advantage is the fine definition of the analog signal which has the potential for an infinite amount of signal resolutio...

An analogue signal is any continuous signal for which the time varying feature (variable) of the signal is a representation of some other t...

The term digital signal is used to refer to more than one concept. It can refer to discrete-time signals that have a discrete number of leve...