Magnetic field sensors having virtual signals
First Claim
1. A magnetic field sensor, comprising:
- a plurality of magnetic field sensing elements configured to generate at least two measured magnetic field signals indicative of a magnetic field affected by an object and having a phase difference with respect to each other; and
a controller responsive to the at least two measured magnetic field signals and configured to generate at least a first virtual quadrature magnetic field signal and at least a second virtual quadrature magnetic field signal having a predetermined phase difference with respect to the first virtual quadrature magnetic field signal.
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Abstract
A magnetic field sensor includes a plurality of magnetic field sensing elements configured to generate at least two measured magnetic field signals indicative of a magnetic field affected by an object and having a first predetermined phase difference with respect to each other and a controller responsive to the at least two measured magnetic field signals. The controller is configured to generate at least one virtual magnetic field signal having a second predetermined phase difference with respect to at least one of the measured magnetic field signals. In embodiments, the virtual magnetic field signal has the second predetermined phase difference with respect to each of the at least two measured magnetic field signals.
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Citations
45 Claims
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1. A magnetic field sensor, comprising:
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a plurality of magnetic field sensing elements configured to generate at least two measured magnetic field signals indicative of a magnetic field affected by an object and having a phase difference with respect to each other; and a controller responsive to the at least two measured magnetic field signals and configured to generate at least a first virtual quadrature magnetic field signal and at least a second virtual quadrature magnetic field signal having a predetermined phase difference with respect to the first virtual quadrature magnetic field signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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generating at least two measured magnetic field signals indicative of a magnetic field affected by an object, wherein the at least two measured magnetic field signals have a phase difference with respect to each other; and processing the at least two measured magnetic field signals to generate at least a first virtual quadrature magnetic field signal and at least a second virtual quadrature magnetic field signal having a predetermined phase difference with respect to the first virtual quadrature magnetic field signal. - View Dependent Claims (14, 15, 16, 17)
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18. An apparatus comprising:
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means for generating at least two measured magnetic field signals indicative of a magnetic field affected by an object, wherein the at least two measured magnetic field signals have a phase difference with respect to each other; and means for processing the at least two measured magnetic field signals to generate at least a first virtual quadrature magnetic field signal and at least a second virtual quadrature magnetic field signal having a predetermined phase difference with respect to the first virtual quadrature magnetic field signal. - View Dependent Claims (19, 20)
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21. A magnetic field sensor, comprising:
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a plurality of magnetic field sensing elements configured to generate at least two measured magnetic field signals indicative of a magnetic field affected by an object and having a first phase difference with respect to each other; and a controller responsive to the at least two measured magnetic field signals and configured to generate at least one virtual magnetic field signal having a second predetermined phase difference with respect to at least one of the measured magnetic field signals. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method comprising:
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generating at least two measured magnetic field signals indicative of a magnetic field affected by an object, wherein the at least two measured magnetic field signals have a first phase difference with respect to each other; and processing the at least two measured magnetic field signals to generate at least one virtual magnetic field signal having a second predetermined phase difference with respect to at least one of the measured magnetic field signals. - View Dependent Claims (36, 37, 38, 39, 40, 41)
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42. Apparatus comprising:
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means for generating at least two measured magnetic field signals indicative of a magnetic field affected by an object and having a first phase difference with respect to each other; and means for generating at least one virtual magnetic field signal based on the at least two measured magnetic field signals, the at least one virtual magnetic field signal having a second predetermined phase difference with respect to at least one of the measured magnetic field signals. - View Dependent Claims (43, 44, 45)
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Specification