Patent ID: 7411803

Claim:
A memory device, comprising: a hall effect device, configured to experience the hall effect when exposed to a magnetic field while carrying a current, the hall effect device having a first current portion, a second current portion, a first effect portion and a second effect portion, wherein when current flows through the first current portion and the second current portion while exposed to a magnetic field the first effect portion and the second effect portion experience a voltage differential; a current source in electrical communication with the first current portion and configured to allow current to flow therethrough; a current drain in electrical communication with the second current portion and configured to allow current to flow therethrough; a first sensor arm in electrical communication with the first effect portion and the current drain through a first resistive portion, configured to carry a signal from the second effect portion to the current drain through the first resistive portion; a second sensor arm in electrical communication with the second effect portion and the current drain through a second resistive portion, configured to carry a signal from the second effect portion to the current drain through the second resistive portion, wherein the second resistive portion has a higher resistance than the first resistive portion; a voltage measurement module in electrical communication with the current drain and configured to provide a signal based on the voltage in the current drain.