Power disturbance detection circuit and method

Details Power disturbance detection circuit and method Power disturbance detection circuit and method

2004-05-18

2010-06-22

He, Amy (Department: 2831)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

C324S620000, C324S613000

Reexamination Certificate

active

07741828

ABSTRACT:
A method and apparatus are disclosed for detecting disturbances in an alternating current (AC) supply. A method includes a step of indicating a relationship between supplied AC voltage and a threshold voltage for at least a portion of each cycle of the supplied AC voltage. A circuit for detecting disturbances in supplied alternating current (AC) is provided. The circuit includes a threshold detector coupled to a source of supplied AC. The threshold detector provides a signal indicating a relationship of the supplied AC levels to a threshold level for at least a portion of each cycle of the supplied AC.

REFERENCES:
patent: 3813667 (1974-05-01), Smith
patent: 5019995 (1991-05-01), Saito et al.
patent: 3927518 (1991-02-01), None
patent: 4220778 (1994-01-01), None
patent: 0322705 (1989-07-01), None
patent: 0599438 (1994-06-01), None
patent: 0949759 (1999-10-01), None
Search Report Dated Jan. 24, 2005 PCT/US2004/015467.

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