Invention Grant
- Patent Title: High-frequency front end circuit
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Application No.: US16440352Application Date: 2019-06-13
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Publication No.: US10432149B1Publication Date: 2019-10-01
- Inventor: Isao Takenaka
- Applicant: Murata Manufacturing Co., Ltd.
- Applicant Address: JP Kyoto
- Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee Address: JP Kyoto
- Agency: Pearne & Gordon LLP
- Priority: JP2017-097220 20170516
- Main IPC: H03F1/26
- IPC: H03F1/26 ; H03F3/24 ; H04B1/04 ; H04B1/18 ; H04B1/40 ; H03F3/19 ; H03F3/195 ; H03F1/56

Abstract:
A high-frequency front end circuit includes an antenna terminal, a reception circuit that is directly or indirectly connected to the antenna terminal, and a transmission circuit that is directly or indirectly connected to the antenna terminal, wherein the transmission circuit has an amplification circuit, the amplification circuit includes an input terminal and an output terminal, an amplification element provided on a path connecting the input terminal and the output terminal, and a bias circuit having an LC resonance circuit and connected to between the amplification element and the output terminal. A frequency pass band of the transmission circuit is lower than a frequency pass band of the reception circuit, and a value of a resonant frequency of the bias circuit is smaller than a value of a frequency pass band width of the transmission circuit.
Public/Granted literature
- US20190296694A1 HIGH-FREQUENCY FRONT END CIRCUIT Public/Granted day:2019-09-26
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