Patent ID: 7908122

Claim:
A signal measurement and processing device comprising: a first system receiving a first signal y and first processing means delivering a first output signal X 1 , said output signal being of the form X 1 =X 0,1 .f 1 (y) with f 1 (y) a first polynomial in y of the form f 1 ⁡ ( y ) = 1 + ∑ i = 1 N ⁢ f i , 1 · y i f i,1 being the coefficients of said polynomial; a second system configured to receive a second signal −y substantially equal to the opposite of the first signal and second processing means delivering a second output signal X 2 , said output signal being of the form X 2 =X 0,2 .f 2 (−y) with f 2 (−y) a second polynomial in y of the form f 2 ⁡ ( - y ) = 1 + ∑ i = 1 N ⁢ f i , 2 · ( - y ) i ; f i,2 being the coefficients of the said second polynomial; third processing means for generating two functions respectively called weighted difference X 3 and weighted sum X 4 , these functions being such that X 3 = X 1 - X 0 , 1 X 0 , 2 ⁢ X 2 ⁢ ⁢ and ⁢ ⁢ X 4 = X 1 + X 0 , 1 X 0 , 2 ⁢ f 1 , 1 f 1 , 2 ⁢ X 2 fourth processing means for calculating y starting from the knowledae of the weighted difference X 3 and of the weighted sum X 4 , the ratios X 0 , 1 X 0 , 2 ⁢ ⁢ and ⁢ ⁢ f 1 , 1 f 1 , 2 being known.