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:
Dec. 27, 2005
Filed:
Dec. 04, 2002
Yoshikazu Shimada, Kyoto, JP;
Hiroyuki Ashida, Kyoto, JP;
Katsuya Ogura, Kyoto, JP;
Sadao Igarashi, Kawasaki, JP;
Yoshikazu Shimada, Kyoto, JP;
Hiroyuki Ashida, Kyoto, JP;
Katsuya Ogura, Kyoto, JP;
Sadao Igarashi, Kawasaki, JP;
Rohm Co., Ltd, Kyoto, JP;
RF Chips Technology Inc., Kawasaki, JP;
Abstract
The present invention provides a transceiver apparatus that permits miniaturization even when the antenna thereof is an unbalanced circuit and the transmitter circuit section and receiver circuit section thereof are balanced circuits. The transceiver apparatus is constituted comprising: a semiconductor integrated circuit device that mounts on the same semiconductor chip a balanced receiver circuitfor receiving a received signal as a differential input and balanced transmitter circuitfor outputting a transmitted signal as a differential output, and that has at least two terminalsconnected to connecting nodes that connect the balanced receiver circuitand the balanced transmitter circuit; first and second capacitors C,Cconnected to the terminalsrespectively; an external inductor Lconnected to the first and second capacitors C, C; a band pass filterand an antennacoupled to the first capacitor C; and a third capacitor Cconnected to the second capacitor C