US 11,757,415 B2
High frequency amplifier circuit and communication device
Atsushi Ono, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed on May 17, 2022, as Appl. No. 17/663,726.
Application 17/663,726 is a continuation of application No. 17/032,986, filed on Sep. 25, 2020, granted, now 11,362,626.
Application 17/032,986 is a continuation of application No. PCT/JP2019/023392, filed on Jun. 13, 2019.
Claims priority of application No. 2018-116342 (JP), filed on Jun. 19, 2018.
Prior Publication US 2022/0278654 A1, Sep. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H03F 1/42 (2006.01); H04B 1/40 (2015.01); H03F 3/24 (2006.01); H04B 1/16 (2006.01)
CPC H03F 1/42 (2013.01) [H03F 3/245 (2013.01); H04B 1/40 (2013.01); H03F 2200/165 (2013.01); H03F 2200/171 (2013.01); H03F 2200/294 (2013.01); H03F 2200/36 (2013.01); H03F 2200/451 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A high frequency amplifier circuit comprising:
an input terminal and an output terminal;
a first power amplifier between the input terminal and the output terminal, and configured to amplify a high frequency signal in a first frequency band being part of a communication band;
a second power amplifier between the input terminal and the output terminal, and configured to amplify a high frequency signal in a second frequency band being part of the communication band;
a first switch circuit comprising a first common terminal, a first selection terminal, and a second selection terminal, the first common terminal being connected to the input terminal, the first selection terminal being connected to an input end of the first power amplifier, and the second selection terminal being connected to an input end of the second power amplifier;
a second switch circuit comprising a second common terminal, a third selection terminal, and a fourth selection terminal, the third selection terminal being connected to an output end of the first power amplifier, and the fourth selection terminal being connected to an output end of the second power amplifier; and
a filter comprising a filter input terminal and a filter output terminal, and the filter input terminal being connected to the second common terminal, and the filter output terminal being connected to the output terminal,
wherein the communication band comprises a plurality of channels allocated as frequency bands usable in a single communication,
the first frequency band is different than the second frequency band,
the first frequency band and the second frequency band partially overlap each other,
an overlapping bandwidth between the first frequency band and second frequency band is equal to or greater than a maximum usage bandwidth of one of the channels of the communication band.