Patent ID: 8000896
Filing Date: 2011-08-16
Classification: G01D

Abstract:
1. A resolver system comprising: at least one resolver including a sine winding and a cosine winding; a reference circuit, the reference circuit providing a series of reference signals; a first switch operable to select between a winding signal from the sine winding and the series of reference signals to provide a first switch signal; a second switch operable to select between a winding signal from the cosine winding and the series of reference signals to provide a second switch signal; a first amplifier to amplify the first switch signal; a second amplifier to amplify the second switch signal, wherein if the first and second switch select for the series of reference signals, the first and second amplifiers provide a series of amplified reference signals; and a non-linearity calibration and compensation circuit configured to use the series of amplified reference signals to provide scale factors to enhance a precision of the resolver system.