摘要 |
<p>A method and apparatus for sensing the speed and direction of a rotating target (502). A first differential hall package (102, 202, 302, 402, 504, 1002) can be generally located opposite to a second differential hall package (104, 204, 304, 404, 1004), wherein the first differential hall package (102, 202, 302, 402, 504, 1002) and second differential hall package (104, 204, 304, 404, 1004) comprise mirror images of one another. A first output signal can then be generated by the first differential hall package (102, 202, 302, 402, 504, 1002) and a second output signal by the second differential hall package (104, 204, 304, 404, 1004) during a rotation of the rotating target (502). The first Hall output signal can thus be compared to the second Hall output signal during a shift of the rotating target (502) from a sinusoidal phase to a non-sinusoidal phase thereof, thereby permitting accurate phase information indicative of the speed and direction of the rotating target (502) to be obtained.</p> |