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US 2011/0298447 A1Published application
Motion Sensor, Method, and Computer-Readable Storage Medium Providing a Motion Sensor with a State Processor Having a Reduced Amount of State Chatter
AssigneeAllegro MicroSystems, LLC
InventorsAndrea Foletto, Devon Fernandez, Eric Burdette
Life of this patent
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Abstract
A motion sensor has a state processor to identify states associated with a magnetic field signal provided by a magnetic field sensing element. The state processor includes a state peak logic module configured to generate states that have a reduced amount of state chatter.
Claims24
A motion sensor, comprising:
- a plurality of magnetic field sensing elements configured to generate a plurality of magnetic field signals indicative of a magnetic field associated with an object;
- and
- a respective plurality of state processors, each state processor coupled to receive a signal representative of a respective one of the plurality of magnetic field signals, wherein each one of the plurality of state processors is configured to generate a respective STATE_SM signal indicative of a plurality of states associated with a respective one of the plurality of magnetic field signals, wherein each one of the plurality of states is indicative of a respective range of signal values, wherein the STATE_SM signal comprises a plurality of first direction state transitions and a plurality of second direction state transitions, wherein the plurality of first direction state transitions and the plurality of second direction state transitions are capable of state transition chatter, and wherein each one of the plurality of state processors comprises:
- a respective state peak logic module coupled to receive the respective STATE_SM signal and configured to generate a respective STATE_PEAK signal, wherein the STATE_PEAK signal comprises a plurality of first direction state peak transitions and a plurality of second direction state peak transitions, wherein the plurality of first direction state peak transitions and the plurality of second direction state peak transitions have reduced state transition chatter.
1 more element
A method of detecting a motion of an object, comprising:
- generating a plurality of magnetic field signals indicative of a magnetic field associated with the object;
- generating a STATE_SM signal indicative of a plurality of states associated with a respective one of the plurality of magnetic field signals, wherein each one of the plurality of states is indicative of a respective range of signal values, wherein the STATE_SM signal comprises a plurality of first direction state transitions and a plurality of second direction state transitions, wherein the plurality of first direction state transitions and the plurality of second direction state transitions are capable of state transition chatter;
- and
- generating a STATE_PEAK signal related to the STATE_SM signal, wherein the STATE_PEAK signal comprises a plurality of first direction state peak transitions and a plurality of second direction state peak transitions, wherein the plurality of first direction state peak transitions and the plurality of second direction state peak transitions have reduced state transition chatter.
1 more element
A computer-readable storage medium having computer readable code thereon for providing sensing of a motion of an object, the medium comprising:
- instructions for receiving a plurality of magnetic field signals indicative of a magnetic field associated with the object;
- instructions for generating a STATE_SM signal indicative of a plurality of states associated with a respective one of the plurality of magnetic field signals, wherein each one of the plurality of states is indicative of a respective range of signal values, wherein the STATE_SM signal comprises a plurality of first direction state transitions and a plurality of second direction state transitions, wherein the plurality of first direction state transitions and the plurality of second direction state transitions are capable of state transition chatter;
- and
- instructions for generating a STATE_PEAK signal related to the STATE_SM signal, wherein the STATE_PEAK signal comprises a plurality of first direction state peak transitions and a plurality of second direction state peak transitions, wherein the plurality of first direction state peak transitions and the plurality of second direction state peak transitions have reduced state transition chatter.
1 more element
The computer-readable storage medium of claim 19, further comprising:
- instructions for holding states values of the STATE_SM signal in a STATE_SM register;
- and
- instructions for holding values of the STATE_PEAK signal in an SM_PEAK register.
Dependencies are inferred from the claim text.