HIGH-FREQUENCY FILTER CIRCUIT, DUPLEXER, HIGH-FREQUENCY FRONT END CIRCUIT, AND COMMUNICATION DEVICE

WIPO Patent Application WO/2017/138540

A1

A high frequency filter circuit (22A) includes: a series-arm resonator (22s); a parallel-arm resonator (22p1); a parallel-arm resonator (22p2) connected between a node x1 and a ground terminal; a switch (22SW) provided between the node x1 and the ground terminal to switch between conduction and non-conduction of a path connecting the node x1, the parallel-arm resonator (22p2), and the ground terminal, a series circuit having a series connection of the parallel-arm resonator (22p1), the parallel-arm resonator (22p2), and the switch (22sW) is connected, in parallel, between the node x1 and the ground terminal, the resonance frequency (frp) of the parallel-arm resonator (22p1) is lower than the resonance frequency (frs) of the series-arm resonator (22s), and the resonance frequency (frp2) of the parallel-arm resonator (22p2) is higher than the resonance frequency (frp) of the parallel-arm resonator (22p1).

JP2003069362	DIPLEXER
WO/2022/097492	FILTER DEVICE AND HIGH-FREQUENCY FRONT END CIRCUIT HAVING SAME MOUNTED THEREON
JP2006514461	Front end circuit

NOSAKA KOJI (JP)
WADA TAKAYA (JP)

PCT/JP2017/004462

August 17, 2017

February 07, 2017

Click for automatic bibliography generation  

MURATA MANUFACTURING CO (JP)

H03H7/46; H03H9/64; H03H9/72; H04B1/00; H04B1/40

WO2015099105A1

2015-07-02

JP2009130831A	2009-06-11
JP2000323961A	2000-11-24
JP2008124556A	2008-05-29
JP2005051656A	2005-02-24
JP2015179982A	2015-10-08
JP2001160766A	2001-06-12

YOSHIKAWA, Shuichi et al. (JP)

View/Download PDF      PDF Help

Previous Patent: HIGH-FREQUENCY FRONT-END CIRCUIT AND COMMUNICATION DEVICE

Next Patent: INFORMATION ACQUIRING APPARATUS AND DISPLAY METHOD