| Definition: | a function equal to the ratio of Fourier transforms of corresponding signals at output and input of a linear and time-invariant two port device
NOTE – The frequency response of a two-port device equals the ratio of the Laplace transforms of output and input signals for the purely imaginary values of the complex frequency, the variable of Laplace transform. It is then the Fourier transform of the unit pulse response of the two-port device.
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