Title:
HIGH-FREQUENCY FILTER, MULTIPLEXER, HIGH-FREQUENCY FRONT END CIRCUIT, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/003855
Kind Code:
A1
Abstract:
A filter (10) is provided with: a serial arm circuit (11); a parallel arm circuit (21) connected to a node x1 and to ground; and a parallel arm circuit (22) connected to a node x2 and to ground. The parallel arm circuit (21) has a parallel arm resonator (p1) and a switch circuit (31), and the parallel arm circuit (22) has a parallel arm resonator (p2) and a switch circuit (32). The switch circuit (31) has a switch (SW1), and the switch circuit (32) has a switch (SW2). An end-to-end voltage Vs1 of the switch (SW1) is smaller than an end-to-end voltage Vs2 of the switch (SW2), and a number of stacks Ns1 of the switch (SW1) is smaller than a number of stacks Ns2 of the switch (SW2).
Inventors:
NOSAKA KOJI (JP)
Application Number:
PCT/JP2018/021907
Publication Date:
January 03, 2019
Filing Date:
June 07, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/64; H03H9/17; H03H9/72; H04B1/00; H04B1/40
Domestic Patent References:
| WO2016190216A1 | 2016-12-01 |
Foreign References:
| US20090251235A1 | 2009-10-08 | |||
| JP2011249466A | 2011-12-08 | |||
| JP2008181911A | 2008-08-07 | |||
| JP2008306359A | 2008-12-18 | |||
| JP2008288741A | 2008-11-27 | |||
| JPH11340783A | 1999-12-10 | |||
| JP2010062816A | 2010-03-18 |
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (JP)
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