In an exemplary embodiment, a method for a magnetic sensor includes forming a first conductive layer over a substrate containing circuitry, forming a dielectric layer over the first conductive layer, forming a second conductive layer over the dielectric layer such that the first conductive layer, the dielectric layer, and the second conductive layer form a first capacitor, and providing first and second terminals, wherein the first terminal is coupled to the first conductive layer and the second terminal is coupled to the second conductive layer.