=== Common transfer function families === While any LTI system can be described by some transfer function or another, there are certain `families` of special transfer functions that are commonly used. Typical infinite impulse response filters are designed to implement one of these special transfer functions. Some common transfer function familie.....
A mathematical relationship between the output of a system and its input.
ratio of the complex quantity representing a time-varying quantity in terms of complex frequency at the output of a linear time-invariant two-port, to the complex quantity repre-senting the corresponding input quantity, the two complex quantities being defined in the same manner NOTE - The complex quantities are generally the Laplace transforms of ...for a linear time-invariant system the ratio of the Laplace transform of an output variable to the Laplace transform of the corresponding input variable if the whole polynomial of initial conditions is equal to zeromathematical expression giving the response of a specified nuclear reactor parameter (for example power) to a variation in the reactivitythe ratio of the complex quantity characterizing a time-varying signal in terms of frequency at the output of a linear time-invariant two-port device, to a complex quantity characterizing the corresponding input signal, the two quantities being defined in the same mannera function equal to the ratio of the Laplace transforms of corresponding signals at output and input of a linear and time-invariant two-port device NOTE - The transfer function of a two-port device is the Laplace transform of its unit pulse response.the ratio of two complex quantities characterizing a signal as a function of frequency at the output and corresponding input of a device NOTE 1 - The transfer function may be taken as the ratio of the Fourier or Laplace transforms of the output and input quantities expressed as functions of time. The term frequency response essentially denotes a ra...in a linear system, quotient of the Fourier or Laplace transform of an output signal by the same transform of the input signal, with all initial conditions zero
The capability of a device to transmit frequencies. See also MTF
The capability of a device to transmit frequencies. See also MTF. 
In a linear elastic structure, the displacement at one point caused by the application of a dynamic force at another point depends on the transfer function between the two points. The transfer function can be obtained at any given frequency by evaluating the response of the second point when a sinusoidal force of unit amplitude is applied at the fi...