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. 01, 2022
Filed:
Sep. 09, 2020
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Seima Kondo, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A filter device includes series and parallel arm resonators provided at a filter chip and inductors electrically connected in series with respective ones of the parallel arm resonators. A first inductor having the highest inductance of the inductors is electrically connected in series with a first parallel arm resonator having the highest anti-resonant frequency of the parallel arm resonators. One end of the first parallel arm resonator and one end of a second parallel arm resonator in other ones of the parallel arm resonators are electrically connected to a same wiring line in wiring lines separated by the series arm resonators on a line electrically connecting an input terminal and an output terminal of the filter chip. The other ends of the first and second parallel arm resonators are respectively electrically connected to first and second ground terminals of the filter chip.