Patent ID: 9052349
Filing Date: 2015-06-09
Classification: G01R

Abstract:
1. A magnetic field sensor, comprising: a magnetic field sensing element configured to generate a magnetic field signal; a gain adjustable analog circuit coupled to receive a signal representative of the magnetic field signal, coupled to receive a gain control signal, and configured to generate a gain adjusted signal having a gain responsive to the gain control signal; a coefficient table memory configured to receive and store a plurality of gain correction coefficients, wherein pairs of the plurality of gain correction coefficients are associated with boundaries of respective temperature segments, each temperature segment bounded by a pair of temperatures, wherein temperature boundaries of the temperature segments are unequally spaced; a temperature sensor configured to generate a temperature signal representative of a temperature; and a segment processor coupled to receive a signal representative of the temperature signal, configured to identify a temperature segment in which the temperature represented by the temperature signal is lies, coupled to receive a pair of gain correction coefficients associated with the identified temperature segment, and configured to interpolate between the pair of gain correction coefficients in accordance with the temperature signal to generate an interpolated gain correction value, wherein the gain control signal is related to the interpolated gain correction value.