Two channel eight bearings magnetic resolver circuit using differential amplifiers for lap counting and timing
First Claim
1. A circuit for resolving a magnetic field, comprising:
- a first channel including a first magnetic field sensor, a first amplifier coupled to and receiving an output from said first magnetic field sensor, and a first three band detector coupled to and receiving an output from said first amplifier, said first three band detector providing a first two bit output;
a second channel including a second magnetic field sensor, a second amplifier coupled to and receiving an output from said second magnetic field sensor, and a second three band detector coupled to and receiving an output from said second amplifier, said second three band detector providing a second two bit output;
wherein said first and second magnetic field sensors are arranged orthogonally to one another such that said first and second two bit outputs resolve the magnetic field into eight bearings;
a null field/offset adjustment circuit coupled to said first and second amplifiers; and
a high band switching reference adjustment circuit and a low band switching reference adjustment circuit coupled to said first and second three band window detectors.
1 Assignment
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Accused Products
Abstract
A circuit for resolving a magnetic field, including a first channel including a first magnetic field sensor, a first amplifier coupled to and receiving an output from said first magnetic field sensor, and a first three band detector coupled to and receiving an output from said first amplifier. The first three band detector provides a first two bit output. A second channel includes a second magnetic field sensor, a second amplifier coupled to and receiving an output from said second magnetic field sensor, and a second three band detector coupled to and receiving an output from said second amplifier. The second three band detector provides a second two bit output. The first and second magnetic field sensors are arranged orthogonally to one another such that said first and second two bit outputs resolve the magnetic field into eight bearings.
10 Citations
14 Claims
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1. A circuit for resolving a magnetic field, comprising:
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a first channel including a first magnetic field sensor, a first amplifier coupled to and receiving an output from said first magnetic field sensor, and a first three band detector coupled to and receiving an output from said first amplifier, said first three band detector providing a first two bit output; a second channel including a second magnetic field sensor, a second amplifier coupled to and receiving an output from said second magnetic field sensor, and a second three band detector coupled to and receiving an output from said second amplifier, said second three band detector providing a second two bit output; wherein said first and second magnetic field sensors are arranged orthogonally to one another such that said first and second two bit outputs resolve the magnetic field into eight bearings; a null field/offset adjustment circuit coupled to said first and second amplifiers; and a high band switching reference adjustment circuit and a low band switching reference adjustment circuit coupled to said first and second three band window detectors. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A lap counter, comprising:
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a microprocessor having a display; and an eight bearing resolver circuit coupled to said microprocessor; wherein said eight bearing resolver circuit comprises a first channel including a first magnetic field sensor, a first amplifier coupled to and receiving an output from said first magnetic field sensor, and a first three band detector coupled to and receiving an output from said first amplifier, said first three band detector providing a first two bit output; a second channel including a second magnetic field sensor, a second amplifier coupled to and receiving an output from said second magnetic field sensor, and a second three band detector coupled to and receiving an output from said second amplifier, said second three band detector providing a second two bit output; wherein said first and second magnetic field sensors are arranged orthogonally to one another such that said first and second two bit outputs are provided to said microprocessor for resolving the magnetic field into eight bearings, said microprocessing incrementing a lap count each time said eight bearings are crossed; a null field/offset adjustment circuit coupled to said first and second amplifiers; and a high band switching reference adjustment circuit and a low band switching reference adjustment circuit coupled to said first and second three band window detectors. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification