Position sensing device
AssigneeMelexis Technologies SA
InventorsJohan Raman, Gael Close, Pieter Rombouts
Life of this patent
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Abstract
A position sensing device for measuring a position, comprises a position sensing device for measuring a position; a plurality of sensors arranged to produce sense signals each being a function of an input phase representative of a position to be measured; a combiner circuit arranged to generate an error signal by combining the sense signals according to an array of weight factors; a processing block including a loop filter to filter the error signal and arranged to output a phase value representative of the position; and a feedback loop comprising a feedback signal unit arranged for receiving the output phase value and for adjusting based on the received output phase value of the array of weight factors.
Claims14
A position sensing device for measuring a position, the position sensing device comprising:
- a plurality of sensors, each of the plurality of sensors being arranged to produce a respective sense signal, each of the respective sense signals produced by the plurality of sensors being a function of an input phase representative of a position to be measured,
- a combiner circuit arranged to receive each of the sense signals respectively produced by the plurality of sensors and to generate an error signal by combining the respective sense signals produced by the plurality of sensors according to a plurality of weight factors, the error signal being indicative of a difference between an output phase representative of the position and the input phase representative of the position to be measured,
- a processing block comprising a loop filter to filter the error signal and to produce a filtered error signal, the processing block being further configured to obtain from the filtered error signal an estimated output phase, and
- a feedback loop comprising a feedback signal unit arranged for receiving the estimated output phase and for adjusting based on the estimated output phase the plurality of weight factors, so that the weight factors are a function of the estimated output phase,
- wherein the plurality of sensors comprises at least three sensors, each of the at least three sensors being arranged to respectively produce a sense signal, each of the respective sense signals produced by the at least three sensors being a different function of an input phase representative of a position to be measured.
A position sensing device for measuring a position, the position sensing device comprising:
- a plurality of sensors including at least a first sensor and a second sensor, each of the plurality of sensors being arranged to produce a respective sense signal such that the first sensor produces at least a first sense signal and the second sensor produces at least a second sense signal, each of the respective sense signals produced by the plurality of sensors being a function of an input phase representative of a position to be measured,
- a combiner circuit arranged to receive each of the sense signals produced by the plurality of sensors including the first sense signal and the second sense signal and to generate an error signal by combining each of the sense signals produced by the plurality of sensors including the first sense signal and the second sense signal with a plurality of corresponding weight factors, the error signal being indicative of a difference between an output phase representative of the position and the input phase representative of the position to be measured,
- a processing block comprising a loop filter to filter the error signal and to produce a filtered error signal, the processing block being further configured to obtain from the filtered error signal an estimated output phase, and
- a feedback loop comprising a feedback signal unit arranged for receiving the estimated output phase and for adjusting based on the estimated output phase the plurality of weight factors, so that the weight factors are a function of the estimated output phase,
- wherein the plurality of sensors includes a third sensor, wherein the third sensor is arranged to produce a third sense signal, the third sense signal also being a function of an input phase representative of a position to be measured.
Dependencies are inferred from the claim text.