Filter circuit

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United States of America Patent

PATENT NO 9331658
APP PUB NO 20140203890A1
SERIAL NO

14053715

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A filter circuit includes an antenna-side circuit, a transmission-side circuit, a reception-side circuit, and an external connection capacitor. The antenna-side circuit is connected to an antenna-side terminal. The transmission-side circuit is connected to a transmission-side terminal and the antenna-side circuit. The reception-side circuit is connected to a reception-side terminal, the antenna-side circuit, and ground. The external connection capacitor is connected between an external control terminal and a connection point between the antenna-side circuit and the reception-side circuit. The antenna-side circuit and the transmission-side circuit constitute a low pass filter. The antenna-side circuit and the reception-side circuit constitute a band pass filter. The reception-side circuit includes an LC parallel resonant circuit.

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First Claim

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Patent Owner(s)

  • MURATA MANUFACTURING CO., LTD.

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Taniguchi, Tetsuo Nagaokakyo, JP 91 2798

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