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. 18, 2016
Filed:
May. 13, 2015
Applicant:
Impinj, Inc., Seattle, WA (US);
Inventors:
John Hyde, Corvallis, OR (US);
Theron Stanford, Seattle, WA (US);
Harley Heinrich, Snohomish, WA (US);
Omer Onen, Redmond, WA (US);
Charles Peach, Kirkland, WA (US);
Assignee:
IMPINJ, INC., Seattle, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K 7/10 (2006.01); G06K 19/07 (2006.01); G06K 19/077 (2006.01);
U.S. Cl.
CPC ...
G06K 7/10158 (2013.01); G06K 7/10297 (2013.01); G06K 19/07754 (2013.01); G06K 19/07773 (2013.01); G06K 19/0723 (2013.01);
Abstract
An RFID tag tuning circuit is capable of tuning the impedance matching between an RFID integrated circuit (IC) and an antenna on an RFID tag to increase the amount of power that the IC can extract from an incident RF wave. The tuning circuit tunes the impedance matching by adjusting a variable impedance coupling the antenna and the IC. Prior to tuning, the variable impedance is set using a voltage output from a tuning switch stage of an IC rectifier.