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:
Mar. 22, 2016
Filed:
Jul. 19, 2012
Terukazu Sato, Oita, JP;
Terukazu Sato, Oita, JP;
OITA UNIVERSITY, Oita, JP;
Abstract
A problem of the present invention is to provide a switching power supply device and a pulse width modulation circuit capable of operating stably in synchronization with a clock signal. To solve the problem, a pulse width modulation circuitA in a switching power supply deviceA includes square-wave voltage output meansA for, when an integrated voltage Vrises to an upper threshold voltage or more, shifting a square-wave voltage Vto L level, or when the voltage Vdrops to a lower threshold voltage or less, shifting the voltage Vto H level, and clock meansA for outputting a first clock signal Vand a second clock signal V, which are 180° out of phase from each other. The square-wave voltage output meansA is adapted to: (1) if the clock signal Vchanges while the voltage Vis dropping, shift the voltage Vto H level even when the voltage Vhas not yet reached the lower threshold voltage; and (2) if the clock signal Vchanges while the voltage Vis rising, shift the voltage Vto L level even when the voltage Vhas not yet reached the upper threshold voltage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile