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:
Feb. 17, 2009
Filed:
Aug. 24, 2005
Teruhisa Ninomiya, Kawasaki, JP;
Yusuke Kawasaki, Inagi, JP;
Osamu Kuroda, Kawasaki, JP;
Yoshinori Tanaka, Kawasaki, JP;
Teruhisa Ninomiya, Kawasaki, JP;
Yusuke Kawasaki, Inagi, JP;
Osamu Kuroda, Kawasaki, JP;
Yoshinori Tanaka, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An RFID transceiver device is capable of high sensitivity reception, by the reduction of noise, irrespective of the distance to the tag. The RFID transceiver device includes a delay circuit between a local oscillation circuit and a demodulation circuit, wherein the amount of delay of the delay circuit is set to a magnitude corresponding to the path difference between the path of leakage, via a duplexer into the demodulation circuit, of transmission signal output from the local oscillation circuit for transmission, and the path of direct input of the local oscillation signal from the local oscillation circuit to the demodulation circuit.