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:
May. 02, 2017
Filed:
Mar. 07, 2014
Applicant:
Advantest Corporation, Tokyo, JP;
Inventors:
Yuki Endo, Tokyo, JP;
Yasuo Furukawa, Tokyo, JP;
Assignee:
ADVANTEST CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 38/14 (2006.01); H02J 5/00 (2016.01); H04B 5/00 (2006.01); H02J 50/12 (2016.01); H02J 17/00 (2006.01); B60L 11/18 (2006.01); H03H 11/30 (2006.01); H02J 7/02 (2016.01);
U.S. Cl.
CPC ...
H01F 38/14 (2013.01); B60L 11/182 (2013.01); H02J 5/005 (2013.01); H02J 17/00 (2013.01); H02J 50/12 (2016.02); H03H 11/30 (2013.01); H04B 5/0037 (2013.01); H04B 5/0075 (2013.01); B60L 2210/20 (2013.01); H02J 7/025 (2013.01); Y02T 10/7005 (2013.01); Y02T 10/7072 (2013.01); Y02T 10/725 (2013.01); Y02T 90/122 (2013.01); Y02T 90/127 (2013.01); Y02T 90/14 (2013.01);
Abstract
An automatic tuning assist circuit is coupled with a transmission antenna. The automatic tuning assist circuit injects a correction current into, or otherwise draws the correction current from, the transmission antenna. An H-bridge circuit is arranged between a first terminal and a second terminal coupled with the transmission antenna. The H-bridge circuit is switched on and off with a frequency that is equal to the frequency of a driving voltage. A third auxiliary coil is arranged between the output terminals of the H-bridge circuit.