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Signals and Systems by Smarajit Ghosh

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SIGNIFICANT POINTS

Signals and Systems   If a function represents a physical quantity or a variable containing information about the behaviour and the nature of the phenomenon is known as a signal. Since a function is mathematically represented as a function of an independent variable, it is denoted by x(t). In a R-L circuit, the current through the resistor or voltage across the inductor is called signal. On the other hand, a device or a set of rules defining the functional relation between the input and output is known as a system.

Continuous time signals   if a signal is defined at all values of t where t is a continuous variable, the signal is known as a continuous time signal.

Classification Of Continuous Time Signals   The continuous time ...

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