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A device, a microelectromechanical system flux concentrator, is described that can minimize 1/f noise in magnetic sensors by modulating the magnetic field at the position of the sensor. This has the effect of shifting the operating frequency to higher frequencies where the 1/f noise can be 1 or 2 orders of magnitude smaller. Magnetic and mechanical modeling results on a design that will operate at 29 kHz are presented.
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Edelstein et al. (2002) studied this question.
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