| CPC H02K 11/215 (2016.01) [G01D 5/145 (2013.01)] | 16 Claims |
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1. An apparatus used in magnetic sensing applications, comprising:
a sensor that is sensitive to magnetic polarities;
a ring magnet associated with the sensor, the ring magnet magnetized to comprise a plurality of pole pairs of opposite magnetic polarities, wherein three pole pairs are larger than at least three other pole pairs, wherein the three larger pole pairs each have arc lengths that are equal and have a south magnetic pole that is smaller than its associated north magnetic pole; and
a digital circuit associated with the sensor, wherein the sensor detects each period of an analog signal produced by the magnetic polarities of each pole pair and couples the analog signals produced to the digital circuit to differentiate the analog signals of the three smaller pole pairs from the analog signals of the three larger pole pairs.
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