Patent ID: 9007054
Filing Date: 2015-04-14
Classification: G01D,G01R

Abstract:
1. An angle measurement device comprising: an angle sensor comprising: magnetic field sensing elements including a first sensing element, a second sensing element and a third sensing element located between the first and second sensing elements, to sense magnetic field associated with a rotating magnet, the first and second sensing elements being located so that sensing by the first sensing element is indicative of a sine function and sensing by the second sensing element is indicative of a cosine function when the angle sensor is aligned with the magnet; circuitry, coupled to the magnetic field sensing elements, to generate first, second and third angle sensor output signals based on the sensing by the first, second and third sensing elements, respectively; and a processing unit, coupled to the angle sensor, to produce an output value based on the first, second and third angle sensor output signals and comprising an error determiner configured to generate an error value indicative of misalignment between the angle sensor and the magnet as a combination of the first, second, and third signals.