Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2011-07-19
2011-07-19
Assouad, Patrick J (Department: 2858)
Electricity: measuring and testing
Magnetic
Displacement
C324S207200, C324S207210
Reexamination Certificate
active
07982454
ABSTRACT:
A proximity detector employs a first peak detector circuit and a second peak detector circuit, both responsive to a magnetic field signal. The second peak detector circuit includes a positive peak detector circuit and a negative peak detector circuit, each of which have a predetermined excursion limit in an outward direction away from a center voltage of the magnetic field signal so as to be less affected by a large signature region in the magnetic field signal. The proximity detector also includes an output control circuit. The output control circuit is configured to provide an output signal, which, during a determined time period, changes state in response to the first peak detector circuit, and which, after the determined time period, changes state in response to the second peak detector circuit.
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Drouin Mathew
Eagen Jeff
Fernandez Devon
Forrest Glenn A.
Allegro Microsystems Inc.
Assouad Patrick J
Daly, Crowley & Mofford & Durkee, LLP
Schindler David M.
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