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. 19, 2023
Filed:
May. 31, 2022
Applicant:
Renesas Design (Uk) Limited, Bourne End, GB;
Inventor:
Yu-Chin Lin, Taipei, TW;
Assignee:
Renesas Design (UK) Limited, Bourne End, GB;
Primary Examiner:
Int. Cl.
CPC ...
H02M 1/14 (2006.01); H02M 1/42 (2007.01); H05B 45/36 (2020.01); H05B 45/355 (2020.01); H05B 45/3725 (2020.01);
U.S. Cl.
CPC ...
H02M 1/143 (2013.01); H02M 1/4258 (2013.01); H05B 45/355 (2020.01); H05B 45/36 (2020.01); H05B 45/3725 (2020.01);
Abstract
A ripple reduction circuit for use with an AC/DC power supply providing an output voltage to a load is presented. The ripple reduction circuit includes an input terminal for receiving the output voltage and a low pass filter. The low pass filter is used to filter an AC component of the output voltage to obtain a filtered DC voltage. The ripple reduction circuit generates a reference current based on the filtered DC voltage and a control voltage having an AC component in phase with the AC component of the output voltage.