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. 13, 2026
Filed:
Apr. 20, 2023
Hitachi, Ltd., Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
To provide a switching power supply circuit that can reduce an amount of a radiated electromagnetic noise even in a case of a jitter in a load, a set voltage, or the like. The switching power supply circuit includes: a pulse width control unit configured to control a pulse width of a pulse voltage output from a switching transistor; a drive voltage control unit configured to control a drive voltage for determining a magnitude of the pulse voltage output from the switching transistor; and a weighting factor calculation unit configured to determine a weighting factor for the pulse width and a weighting factor for the drive voltage based on a difference value between a set output voltage value set in advance for a power supply circuit and a measured output voltage value, which is a result of measuring an output voltage of the power supply circuit, and the set output voltage value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile