Ground fault circuit interrupter and method

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United States of America Patent

PATENT NO 9680421
SERIAL NO

15132775

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Abstract

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A method and circuit for dynamically correcting offsets associated with an AC power system. In an embodiment, a first offset current generated in response to a ground to neutral fault stimulus is decreased and a second offset current generated in response to a differential fault stimulus is decreased. In another embodiment, the circuit includes an offset correction circuit that has one of a chopper circuit or an auto-zeroing circuit. An amplifier is connected to the offset correction circuit and an output connected to the offset correction circuit. A signal generator is switchably coupled to a first input of the offset correction circuit and a bias generator is switchably coupled to the first input of the offset correction circuit.

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Patent Owner(s)

Patent OwnerAddress
SEMICONDUCTOR COMPONENTS INDUSTRIES LLC5701 N PIMA ROAD SCOTTSDALE AS 85250

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Beck, Riley D Eagle Mountain, US 12 94
Layton, Kent D Lehi, US 11 70

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