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:
Dec. 06, 2005
Filed:
Nov. 20, 2003
Hirofumi Abe, Gamagori, JP;
Hirokazu Itakura, Hazu-gun, JP;
Hiroyuki Ban, Hazu-gun, JP;
Shoichi Okuda, Nukata-gun, JP;
Kingo Ota, Nishio, JP;
Hirofumi Abe, Gamagori, JP;
Hirokazu Itakura, Hazu-gun, JP;
Hiroyuki Ban, Hazu-gun, JP;
Shoichi Okuda, Nukata-gun, JP;
Kingo Ota, Nishio, JP;
Denso Corporation, Kariya, JP;
Abstract
In a voltage booster, a voltage detection circuit detects a battery voltage as an input voltage. If the input voltage is lower than a threshold level, an oscillation circuit outputs a gate signal having a relatively high frequency to increase the driving performance of a driving circuit. If the input voltage is higher than the threshold level, the frequency of the gate signal is lowered so as to prevent the driving performance of the driving circuit from rising to an excessively high value. As a result, a predetermined boosted voltage can be obtained regardless of variations in input voltage without using a filter for eliminating noise.