Integrated uninterrupted power supply unit

Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source

Reexamination Certificate

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Reexamination Certificate

active

07851944

ABSTRACT:
A system may provide integrated uninterrupted power supply for computer systems. The system comprise a first unit that outputs an AC input voltage, and produces an AC output voltage from a battery voltage in response to the AC input voltage being absent; and a second unit that produces a DC output voltage from the AC input voltage, and produces the DC output voltage from the battery voltage in response to the AC input voltage being absent.

REFERENCES:
patent: 5347164 (1994-09-01), Yeh
patent: 5563778 (1996-10-01), Oh
patent: 5657257 (1997-08-01), Kyung
patent: 6700802 (2004-03-01), Ulinski et al.
patent: 6788029 (2004-09-01), Gabrys
patent: 7402921 (2008-07-01), Ingemi et al.
patent: 1122465 (1996-05-01), None
patent: 1484355 (2004-03-01), None
patent: WO-9115048 (1991-10-01), None
International Search Report and Written Opinion, PCT/CN2005/002402, Nov. 16, 2006, 7 pages.

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