Threshold detection in back-up power supply systems

Electrical transmission or interconnection systems – Plural supply circuits or sources – Connecting or disconnecting

Reexamination Certificate

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Details

C307S130000

Reexamination Certificate

active

07834481

ABSTRACT:
A threshold detection circuit includes, in one embodiment, a comparator having a first input connection for receiving a backup voltage from a backup power source, a second input connection for receiving a primary voltage from a primary power source, and an output connection for providing an output voltage; a first resistor and a first capacitor that are coupled in series between the first input connection and the output connection; and a second resistor that is coupled between the first input connection and the output connection, and that is coupled in parallel to the series of first resistor and the first capacitor.

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patent: 0843398 (1997-07-01), None

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