Login| Sign Up| Help| Contact|

Patent Searching and Data


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 (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2018/021907
Publication Date:
January 03, 2019
Filing Date:
June 07, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
International Classes:
H03H9/64; H03H9/17; H03H9/72; H04B1/00; H04B1/40
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (6F Tanaka Ito Pia Shin-Osaka Bldg., 3-10, Nishi Nakajima 5-chome, Yodogawa-ku, Osaka-cit, Osaka 11, 〒5320011, JP)
Download PDF: