A Hall effect sensors network insensitive to mechanical stress

Hall effect devices are widely used as magnetic sensors in integrated technology. Since they are very sensitive to mechanical stress, they are not suitable for the design of systems subjected to vibrations (portable systems, automotive applications,...). To cancel this cross-sensitivity, the spinning current method may be used. Nevertheless, this method does not remove, but modulates, the mechanical signal. Vibrations whose frequencies are close to the spinning frequency are thus rejected in the base band. Here, we propose an alternative based on a Hall effect sensor network. This method totally removes the mechanical signal and may be combined with the spinning current method in order to reject the flicker noise of the sensor. Compared experimental results obtained with Hall effect sensors subjected to vibrations are presented and discussed.