Patent ID: 7796028
Filing Date: 2010-09-14
Classification: B82Y,G01R

Abstract:
1. Circuitry for detecting magnetic fields, the circuitry comprising: a first magnetoresistive sensor; a second magnetoresistive sensor, wherein the first magnetoresistive sensor and the second magnetoresistive sensor are configured to operate in combination to form a gradiometer; a digital signal processor; a first feedback loop operably coupling the first magnetoresistive sensor and the digital signal processor; a second feedback loop discrete from the first feedback loop, the second feedback loop operably coupling the second magnetoresistive sensor and the digital signal processor; and wherein at least one of the first feedback loop and the second feedback loop comprises at least one of a set/reset component and an offset adjustment device coupled between the digital signal processor and at least one of the first magnetoresistive sensor and the second magnetoresistive sensor.