Patent Document ID: 20090300090
Application ID: 12540802
Patent Status: 0

Claim One:
1. Method for determining an angle ( 9 ) by means of a resolver ( 3 ), which resolver has an input for an excitation signal ( 29 ) and at least two outputs for response signals ( 13 , 14 ), an in which method an excitation signal ( 29 ) of essentially constant frequency is supplied to the resolver ( 3 ) the resolver response signals ( 13 , 14 ) are measured characterized in that FIR filtering ( 10 ) is computed for the measured response signal values ( 16 ), and the computation points ( 23 , 24 ) and the set of computation result values A 1 ( 18 ) corresponding to these points are stored in memory each computation point ( 23 , 24 ) is shifted at least once relative to the excitation signal ( 29 ), the new computation points ( 25 , 26 ) and the new set of values ( 19 ) of computation results are stored in memory at least two sets of values An ( 18 , 19 ) of computation results are compared to each other and of these the value set Amax ( 19 ) which contains the highest computation result as an unsigned value is selected FIR filtering ( 10 ) is repeatedly computed at predetermined computation points ( 25 , 26 ) corresponding to value set Amax ( 19 ), and angle data ( 9 ) is determined from the computation results.