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, 2018
Filed:
Jul. 12, 2016
Applicant:
Apple Inc., Cupertino, CA (US);
Inventors:
Asif Hussain, San Jose, CA (US);
Nicholas A. Sims, San Francisco, CA (US);
Assignee:
Apple Inc., Cupertino, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/335 (2006.01); H02M 1/44 (2007.01); H02M 3/28 (2006.01); H02M 1/00 (2006.01); H02M 3/158 (2006.01);
U.S. Cl.
CPC ...
H02M 3/33507 (2013.01); H02M 1/44 (2013.01); H02M 3/285 (2013.01); H02M 3/33561 (2013.01); H02M 3/1584 (2013.01); H02M 3/33515 (2013.01); H02M 2001/007 (2013.01); H02M 2001/008 (2013.01); H02M 2001/009 (2013.01);
Abstract
A power supply with reduced electromagnetic interference (EMI) is described. This power supply includes cascaded stages with switched-mode power-supply circuits that are switched synchronously during operation by switching signals that have a common fundamental frequency. EMI associated with the power supply is reduced by establishing a phase shift between the switching signals in at least two of the stages.