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:
Nov. 07, 2017
Filed:
Jul. 31, 2014
Applicant:
Apple Inc., Cupertino, CA (US);
Inventor:
David W. Ritter, Cupertino, CA (US);
Assignee:
Apple Inc., Cupertino, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02J 7/00 (2006.01); H03H 7/38 (2006.01); H02J 7/02 (2016.01); H02J 5/00 (2016.01);
U.S. Cl.
CPC ...
H03H 7/38 (2013.01); H02J 5/005 (2013.01); H02J 7/025 (2013.01); H02J 7/0042 (2013.01);
Abstract
Wireless power transfer systems having improved power transfer efficiency are disclosed. A wireless power receiver may include an automatic impedance regulator that adjusts the effective input impedance of the receiver depending upon the power requirements of the receiver. For example, in certain embodiments, the impedance regulator is a boost converter. The boost converter may exploit the leakage inductance of the receive coil to boost the voltage output from the terminals of the receive coil. The effective input impedance may be substantially matched to the output impedance of the transmitter.