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:
Feb. 25, 2003
Filed:
Jul. 25, 2001
Koji Umetsu, Miyagi, JP;
Masayoshi Sasaki, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
Providing a power supply system having a plurality of power supply apparatuses connected in parallel to each other, each of which is not affected by a voltage fluctuation of a reverse flow-preventive diode provided in an output line thereof, and can provide a stable output voltage controlled with high accuracy. Each of the power supply apparatuses includes a positive output terminal connected to a load , a reverse flow-preventive diode connected to the positive output terminal , a V correcting circuit for detecting a forward voltage of the reverse flow-preventive diode and providing a controlling unit with the detected voltage in a feedback manner, an output current detecting/correcting circuit for detecting a forward current of the reverse flow-preventive diode and providing the controlling unit with the detected current in a feedback manner, and the controlling unit for controlling the anode potential of the reverse flow-preventive diode . The controlling unit controls the transformer by the switching operation so that the anode potential of the reverse flow-preventive diode remains constant, and drops the anode potential in accordance with the forward current of the reverse flow-preventive diode , and raises the anode potential in accordance with the forward voltage of the reverse flow-preventive diode