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:
Nov. 21, 2006
Filed:
Nov. 10, 2004
Takehiko Yamakawa, Suita, JP;
Hiroshi Yamaguchi, Katano, JP;
Hiroshi Nakatsuka, Katano, JP;
Hiroyuki Nakamura, Katano, JP;
Keiji Onishi, Settsu, JP;
Toshio Ishizaki, Kobe, JP;
Takehiko Yamakawa, Suita, JP;
Hiroshi Yamaguchi, Katano, JP;
Hiroshi Nakatsuka, Katano, JP;
Hiroyuki Nakamura, Katano, JP;
Keiji Onishi, Settsu, JP;
Toshio Ishizaki, Kobe, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A series piezoelectric resonator is connected in series between an input terminal and an output terminal. A first electrode of a first parallel piezoelectric resonator is connected to a connection point between the input terminal and the series piezoelectric resonator, and a second electrode of the first parallel piezoelectric resonator is connected to a first terminal of a first inductor. A first electrode of a second parallel piezoelectric resonator is connected to a connection point between the series piezoelectric resonator and the output terminal, and a second electrode of the second parallel piezoelectric resonator is connected to a first terminal of a second inductor. Second terminals of the first and second inductors are grounded. An additional piezoelectric resonator is connected between the second electrode of the first parallel piezoelectric resonator and the second electrode of the second parallel piezoelectric resonator.