Patent ID: 8933690
Filing Date: 2015-01-13
Classification: G01B,G01R

Abstract:
1. An angle detection apparatus to detect an angle of a rotation axis of a rotating device to generate a first signal and a second signal perpendicular to the first signal using an angle detection unit, comprising: a first analog-to digital (AD) conversion unit to receive the first signal, the first analog-to-digital (AD) conversion unit to perform an analog-to-digital conversion of the first signal; a second analog-to digital (AD) conversion unit to receive the second signal, the second analog-to digital (AD) conversion unit to perform an analog-to-digital conversion of the second signal; a first offset correction unit to receive a third signal output from the first analog-to digital (AD) conversion unit, the first offset correction unit to perform an offset correction of the third signal when the third signal is outside a range of a predetermined value; and a second offset correction unit to receive a fourth signal output from the second analog-to digital (AD) conversion unit, the second offset correction unit to perform the offset correction of the fourth signal when the fourth signal is outside the range of the predetermined value.