Finite memory filter

G - Physics – 06 – G

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354/153

G06G 7/18 (2006.01) G06G 7/625 (2006.01)

Patent

CA 1045721

ABSTRACT OF THE INVENTION Method for designing an integrating circuit having a finite memory such that an accurate average of events over a time period just ended can be obtained without having events occurring previous to the time period affecting the resultant data, and the circuit obtained. A polynomial expression is formed by taking a continued fraction expansion of the Laplace transformation expression Image where T is a predetermined period of time. The polynomial is solved using Bessel's coefficient equation and expressed as an approxi- mate transfer function of the desired circuit response. Net- work synthesis techniques are applied to the approximate transfer function to design the approximately ideal integrator circuit.

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