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:
Sep. 04, 2012
Filed:
Jun. 22, 2009
Junji Nishida, Osaka, JP;
Junji Nishida, Osaka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A switching regulator is disclosed that includes a switching element; an inductor; a rectifier element; an error amplifier circuit portion; a PWM pulse generating circuit portion; a current sensing circuit portion; an output voltage decrease detecting circuit portion; a current pulse generating circuit portion; a phase detecting circuit portion; a VFM pulse generating circuit portion; and a switching control circuit portion configured to generate a control signal based on a PWM signal or a VFM signal and to switch a control status of the switching element from a PWM control to a VFM control in accordance with a third signal output from the phase detecting circuit portion, and to switch the control status from the VFM control to the PWM control in accordance with a second signal output from the output voltage decrease detecting circuit portion.