Patent ID: 6864808

Claim:
A system for processing a signal comprising: a) a frequency generator for providing an excitation signal to a primary winding of a variable differential transformer; b) means for sampling output voltages from a pair of secondary windings of the variable differential transformer for use in determining the position P of a movable core of the variable differential transformer as a solution to the equation P = ( S1 - S2 ) ( S1 + S2 ) where S 1 and S 2 represent the output voltages of the secondary windings of the variable differential transformer; and c) means for conditioning the sampled S 1 and S 2 output voltages in such a manner so that the sum of the conditioned S 1 and S 2 output voltages is equal to a constant reference voltage, whereby the position P is equal to the difference between the S 1 output voltage and the S 2 output voltage.