Arrangements for magnetic field sensors that act as movement detectors

    公开(公告)号:US10041810B2

    公开(公告)日:2018-08-07

    申请号:US15176665

    申请日:2016-06-08

    CPC classification number: G01D5/142 G01D5/147

    Abstract: Magnetic field sensors can sense speed of movement and direction of movement of a ferromagnetic object. The magnetic field sensors employ both planar Hall effect elements and vertical Hall effect elements to generate two-state signals in two different signal paths with relative phases that are ninety degrees apart, the ninety degrees having sufficient margin to aid in detection of the direction of motion. Other magnetic field sensors use at least four vertical Hall effect elements to identify a speed of rotation and a direction of rotation of a moving ferromagnetic object.

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