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1. (WO2018061782) HIGH-FREQUENCY FRONT-END CIRCUIT AND COMMUNICATION DEVICE

Pub. No.:    WO/2018/061782    International Application No.:    PCT/JP2017/033141
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Thu Sep 14 01:59:59 CEST 2017
IPC: H04B 1/00
H04B 1/52
Applicants: MURATA MANUFACTURING CO., LTD.
株式会社村田製作所
Inventors: NOSAKA, Koji
野阪 浩司
Title: HIGH-FREQUENCY FRONT-END CIRCUIT AND COMMUNICATION DEVICE
Abstract:
A high-frequency front-end circuit (1) is provided with a switch circuit (10), duplixers (20, 30) and a capacitor (C), the switch circuit (10) having a main switch (SW1) for switching a connection between a common terminal (111) and a selection terminal (112), a sub-switch (SW1g) for switching a connection between the selection terminal (112) and ground by exclusive on/off with the main switch (SW1), a main switch (SW2) for switching a connection between the common terminal (111) and a selection terminal (113), and a sub-switch (SW2g) for switching a connection between the selection terminal (113) and ground by exclusive on/off with the main switch (SW2), there being switching between a first connection state in which only one of the main switches (SW1, SW2) is turned on and a second connection state in which both are turned on, the capacitor (C) connecting the selection terminal (112) and the selection terminal (113) together.