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:
Jan. 23, 2007
Filed:
Jan. 09, 2004
Fumihiko Aiga, Kanagawa, JP;
Tatsunori Hashimoto, Kanagawa, JP;
Yoshiaki Terashima, Kanagawa, JP;
Mutsuki Yamazaki, Kanagawa, JP;
Hiroyuki Fuke, Kanagawa, JP;
Hiroyuki Kayano, Kanagawa, JP;
Fumihiko Aiga, Kanagawa, JP;
Tatsunori Hashimoto, Kanagawa, JP;
Yoshiaki Terashima, Kanagawa, JP;
Mutsuki Yamazaki, Kanagawa, JP;
Hiroyuki Fuke, Kanagawa, JP;
Hiroyuki Kayano, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A filter circuit has a complex block and exciting portions. The complex block has: a first block end resonator; a first resonator that is coupled to the first block end resonator; a second resonator that is coupled to the first resonator; a third resonator that is coupled to the second resonator; a fourth resonator that is coupled to the third resonator; and a second block end resonator that is coupled to the fourth resonator. Couplings between the first block end resonator and the second block end resonator, between the first resonator and the fourth resonator, and between the second resonator and the third resonator are in phase. The complex block and the exciting portions are single-path-coupled.