:: IPCI ::

LTI system is completely described by

Output from the system in time domain:

Output from the system in frequency domain: Y(f) = X(f) H(f)

Transfer function (frequency response) H(f)

... Fourier transform (spectrum) of the impulse response

The frequency response function is complex-valued, it is convenient to write it in polar form:

To sketch the frequency response, we sketch

as a function of frequency . This is called a Bode diagram.

Other criterion for systems classification

FIR system: Impulse response of finite length

IIR system: Impulse response of infinite length

Related Reading:

Gregorian, R., Temes G. C., Analog MOS integrated circuits for signal processing, Wiley, 1986.

Johns, D. A., Martin, K., Analog integrated circuit design, Wiley, 1997.

Razavi, B., RF Microelectronics, Prentice Hall, 1998.

Bendat, J. S., Piersol, A. G., Random Data: Analysis & Measurement Procedures, J. Wiley, 2000.