Patent ID: 8063634
Filing Date: 2011-11-22
Classification: B82Y,G01R

Abstract:
1. An electronic circuit, comprising: a primary magnetoresistance element for providing a first output signal proportional to a magnetic field, wherein the primary magnetoresistance element has a primary maximum response axis, wherein the primary magnetoresistance element has a hysteresis characteristic; a reset conductor disposed proximate to the magnetoresistance element; a secondary magnetic field sensing element for providing a second output signal proportional to a magnetic field, wherein the secondary magnetic field sensing element has a secondary maximum response axis; and a comparison circuit coupled to receive the second output signal, configured to compare the second output signal to a threshold signal, and configured to generate a reset current carried by the reset conductor in response to the comparison, wherein, in response to the reset current, the reset conductor is configured to generate a reset magnetic field at the primary magnetoresistance element to temporarily force the magnetoresistance element to a saturation region of the hysteresis characteristic.