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:
Nov. 20, 2012
Filed:
Jun. 05, 2009
Ryuta Nagai, Kasugai, JP;
Ryuta Nagai, Kasugai, JP;
Fujitsu Semiconductor Limited, Yokohama, JP;
Abstract
A DC-DC converter has an error amplifier, a first control unit and an oscillator. The error amplifier amplifies an error voltage between an output voltage and a set voltage, the output voltage being outputted from an inductance element by feeding an input voltage to an inductance element in a predetermined cycle. The first control unit controls the output voltage to a set voltage by causing a switching operation of a switch element in response to an output of the error amplifier, the switch element forming a path for input voltage feed to the inductance. The oscillator generates a periodical signal at the time of switching the switch element. The oscillator handles an oscillation cycle as a short cycle in comparison to any prior cycles, in response to a drop in the output voltage from the set voltage by an amount equivalent to a first voltage value or more.