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:
Aug. 10, 2010
Filed:
Jun. 29, 2005
Keisuke Fukamachi, Saitama-ken, JP;
Shigeru Kemmochi, Saitama-ken, JP;
Kazuhiro Hagiwara, Saitama-ken, JP;
Takahiro Yamashita, Saitama-ken, JP;
Masayuki Uchida, Tottoti-ken, JP;
Keisuke Fukamachi, Saitama-ken, JP;
Shigeru Kemmochi, Saitama-ken, JP;
Kazuhiro Hagiwara, Saitama-ken, JP;
Takahiro Yamashita, Saitama-ken, JP;
Masayuki Uchida, Tottoti-ken, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A high-frequency circuit comprising a switch circuit for properly switching the connection of an antenna terminal and four input/output terminals; a first received-signal output terminal being connected to a receiving circuit of a first communications system via a filter circuit; a second received-signal output terminal being connected to a receiving circuit of a second communications system via a filter circuit; a first transmitting-signal input terminal being connected to a transmitting circuit of a first communications system; and a second transmitting-signal input terminal being connected to a transmitting circuit of a second communications system via a power amplifier circuit, the high-frequency circuit further comprising a bandpass filter circuit disposed in any one or more paths between the antennas and the transmitting-signal input or received-signal output; and a detection circuit having a voltage detection terminal for monitoring the output power of the power amplifier circuits.