The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 2002
Filed:
Dec. 01, 2000
Kazuo Ohashi, Fujisawa, JP;
Keiji Suzuki, Fujisawa, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A signal PWR is driven into a low level in response to a power-off command from the computer, then the low level PWR signal is entered to an input terminal of a switching circuit and regulators to respectively. Consequently, the regulators come to rest and thereby the power supply to the computer is shut off. Receiving the low level PWR signal, a photo-coupler and a transistor in the switching circuit are turned off respectively, as well as the operation of a power factor correction circuitry is stopped. Consequently, an AC power factor correction circuitry comes to rest when the power supply to the computer is shut off, and thereby the power consumption of the computer can be reduced.