Patent ID: 6094488
Filing Date: 2000-07-25
Classification: H04S

Abstract:
A method of dynamically computing a ratio y(n) between two digital values, respectively a(n) and b(n), representing the n.sup.th elements of two respective sequences of digital input data representing two quantities slowly varying in time, the method comprising the steps of:implementing the following algorithm:y(n)=y(n-1)+g*[a(n)-b(n)* y(n-1)]wherein g represents a constant factor, and which, in a domain of the z transform, becomes:Y(z)=z.sup.-1 *Y(z)+g[A(z)-B(z) conv Y(z)z.sup.-1 ]where conv indicates an operation of convolution, and which for input sequences corresponding to signals filtered through a lowpass filter having a predetermined time constant is simplified to: ##EQU3##