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:
Oct. 16, 2007
Filed:
Dec. 20, 2006
Kazuto Nakamura, Hitachinaka, JP;
Ryuji Fukute, Hitachinaka, JP;
Atsushi Okonogi, Hitachinaka, JP;
Kazuaki Takano, Mito, JP;
Kazuto Nakamura, Hitachinaka, JP;
Ryuji Fukute, Hitachinaka, JP;
Atsushi Okonogi, Hitachinaka, JP;
Kazuaki Takano, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A power supply apparatus controls the gate and drain power supplies at the rise time so that an output voltage of the gate power rises earlier than that of the drain power supply. Another power supply control apparatus controls the gate and drain power supplies at the fall time so that an output voltage of the gate power supply fails later than that of the drain power supply. Another power supply control apparatus turns off the drain supply of the FET among power supplies when it is detected by a voltage monitor whenever either of output voltages or the power supplies are not within said specified range.