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:
Oct. 18, 2022
Filed:
Nov. 26, 2018
Murata Manufacturing Co., Ltd., Kyoto, JP;
Koji Nosaka, Kyoto, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A filter (A) includes: a series arm circuit () that is connected between an input/output terminal (m) and an input/output terminal (); and a parallel arm circuit () that is connected between a node (x), which is on a path that connects the input/output terminal (m) and the input/output terminal (), and ground. The parallel arm circuit () includes a parallel arm resonator () and an impedance circuit () that is serially connected to the parallel arm resonator (). The impedance circuit () includes a first impedance element, which is one of an inductor and a capacitor, a second impedance element, which is the other of an inductor and a capacitor, and a switch (SW) that is serially connected to the second impedance element. A first series circuit () comprising of the second impedance element and the switch (SW) is connected in parallel with the first impedance element.