Electricity: power supply or regulation systems – Input level responsive
Reexamination Certificate
2005-03-29
2005-03-29
Nguyen, Matthew V. (Department: 2838)
Electricity: power supply or regulation systems
Input level responsive
Reexamination Certificate
active
06873142
ABSTRACT:
A method for selectively enabling flow of current to a load from an alternating current supply signal connected to the load is presented. The method includes storing a first time passing between a zero-crossing of the supply signal, the first zero-crossing indicating a leading edge of the signal, and a second zero-crossing of the supply signal, the second zero-crossing indicating a trailing edge of the supply signal. The method further includes sending a first signal enabling flow of the current according to a desired conduction angle when a subsequent zero-crossing indicating the leading edge of the supply signal does not occur within a second time, the second time being at least as long as the first time.
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Lionel L.L.C.
Nguyen Matthew V.
O'Melveny & Myers LLP
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