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US 12,348,209 B2Granted
Filter, filter module, and electronic device
AssigneeMurata Manufacturing Co., Ltd.
InventorsKenichi Ishizuka, Kentaro Mikawa, Satoshi Shigematsu
Life of this patent
Estimating the term…
Abstract
A filter includes a first capacitor connected in series between a first terminal pair and a second terminal pair, a first inductor connected in parallel with the first capacitor, and a second inductor connected in parallel between the first terminal pair and the second terminal pair. The first inductor and the second inductor are magnetically coupled to each other and are differentially connected to each other.
Claims16
A filter comprising:
- a first capacitor connected in series between a first terminal pair and a second terminal pair;
- a first inductor connected in parallel with the first capacitor;
- a second inductor connected in parallel between the first terminal pair and the second terminal pair;
- and
- a multilayer body including a plurality of insulator layers;
- wherein
- the filter includes a high pass filter characteristic between the first terminal pair and the second terminal pair;
- the first inductor and the second inductor are magnetically coupled to each other and are differentially connected to each other;
- the first inductor includes a first coiled conductor in the multilayer body;
- the second inductor includes a second coiled conductor in the multilayer body;
- the first capacitor includes first capacitor electrodes and an insulator layer among the plurality of insulator layers, the first capacitor electrodes facing each other in a stacking direction of the plurality of insulator layers;
- the first coiled conductor includes a first coil cavity;
- the second coiled conductor includes a second coil cavity;
- a winding axis of the first coiled conductor is parallel or substantially parallel to that of the second coiled conductor;
- the first coil cavity and the second coil cavity have an overlapping region when viewed in a direction of the winding axis;
- a first end of the first inductor is connected to a first end of the second inductor;
- and
- a second end of the second inductor is connected to ground.
15 more elements
A filter comprising:
- a first capacitor connected in series between a first terminal pair and a second terminal pair;
- a second capacitor connected between the second terminal pair and the first capacitor;
- a first inductor connected in parallel with the first capacitor;
- a second inductor connected in parallel between the first terminal pair and the second terminal pair;
- and
- a multilayer body including a plurality of insulator layers;
- wherein
- the first inductor and the second inductor are magnetically coupled to each other and are differentially connected to each other;
- the first inductor includes a first coiled conductor in the multilayer body;
- the second inductor includes a second coiled conductor formed in the multilayer body;
- the first capacitor includes first capacitor electrodes and an insulator layer among the plurality of insulator layers, the first capacitor electrodes facing each other in a stacking direction of the plurality of insulator layers;
- the second capacitor includes second capacitor electrodes and an insulator layer among the plurality of insulator layers, the second capacitor electrodes facing each other in the stacking direction of the plurality of insulator layers;
- and
- the filter further comprising:
- a wiring conductor connected in series between a second capacitor electrode among the second capacitor electrodes and the second terminal pair and located between the first coiled conductor and the second coiled conductor in the multilayer body.
12 more elements
A filter comprising:
- a first capacitor connected in series between a first terminal pair and a second terminal pair;
- a first inductor connected in parallel with the first capacitor;
- a second inductor connected in parallel between the first terminal pair and the second terminal pair;
- and
- a multilayer body including a plurality of insulator layers;
- wherein
- the first inductor and the second inductor are magnetically coupled to each other and are differentially connected to each other;
- the first inductor includes a first coiled conductor in the multilayer body;
- the second inductor includes a second coiled conductor in the multilayer body;
- the first capacitor includes first capacitor electrodes and an insulator layer among the plurality of insulator layers, the first capacitor electrodes facing each other in a stacking direction of the plurality of insulator layers;
- the first coiled conductor and the first capacitor electrodes include continuous conductive patterns;
- a first end of the first inductor is connected to a first end of the second inductor;
- and
- a second end of the second inductor is directly connected to ground.
11 more elements
Dependencies are inferred from the claim text.