Patent ID: 9618589
Date: 2017-04-11
CPC Classifications: G01R,G11B,H01L

Claim:
1. A device, comprising: at least a first magneto-resistive sensor element configured to generate a first signal in response to a magnetic field, wherein the first magneto-resistive sensor element comprises a first section of a common layer stack comprising ferromagnetic and non-magnetic layers formed on a common substrate; a second magneto-resistive sensor element configured to generate a second signal in response to the same magnetic field for verifying the first signal, wherein the second magneto-resistive sensor element comprises a second section of the common layer stack, wherein the first and the second sections comprise common ferromagnetic and non-magnetic layers of the common layer stack; and a verification circuit configured to compare the first signal against the second signal and generate an output signal that indicates whether or not the first signal and the second signal correspond to one another by determining whether a difference between the first and second signal or a ratio between the first and second signal is within a predetermined range.