公开(公告)号：US20230136392A1

公开(公告)日：2023-05-04

申请号：US17555526

申请日：2021-12-20

Applicant: RichWave Technology Corp.

Inventor： Chia-Wei Hsu ,  Chih-Sheng Chen ,  Yu-Hsuan Chao

IPC: H04B1/48 ,  H04B1/04 ,  H04B1/00 ,  H04B1/16

Abstract: A front end module includes a first radio frequency (RF) terminal, a second RF terminal, a third RF terminal, a transmission path and a reception path. The transmission path is formed between the first RF terminal and the third RF terminal. The reception path is formed between the first RF terminal and the second RF terminal. The reception path includes a first set of switches, a second set of switches, a third set of switches and an amplifier. An amplifier is coupled to the second set of switches and the second RF terminal. The third set of switches is coupled to the first set of switches and the second RF terminal. When a transmission signal is transmitted to the first RF terminal via the transmission path, the first set of switches, the second set of switches and the third set of switches are turned off.

公开(公告)号：US20240186952A1

公开(公告)日：2024-06-06

申请号：US18081625

申请日：2022-12-14

Applicant: RichWave Technology Corp.

Inventor： Chih-Sheng Chen ,  Yu-Hsuan Chao

IPC: H03F1/02 ,  H03F3/193

CPC classification number: H03F1/0205 ,  H03F3/193 ,  H03F2200/451

Abstract: An amplifying circuit includes a first transistor, a second transistor, and a switching circuit. A control terminal of the first transistor is coupled to an input terminal of the amplifying circuit, and a first terminal of the first transistor is coupled to a first reference end. The input terminal of the amplifying circuit receives a first radio frequency (RF) signal. A first terminal of the second transistor is coupled to a second terminal of the first transistor, and a second terminal of the second transistor is coupled to an output terminal of the amplifying circuit. The output terminal of the amplifying circuit outputs an amplified signal. The first transistor amplifies the first RF signal to generate a second RF signal. The switching circuit performs a switching operation to transmit the second RF signal to one of the first terminal and the control terminal of the second transistor.

公开(公告)号：US11750239B2

公开(公告)日：2023-09-05

申请号：US17555526

申请日：2021-12-20

Applicant: RichWave Technology Corp.

Inventor： Chia-Wei Hsu ,  Chih-Sheng Chen ,  Yu-Hsuan Chao

IPC: H04B1/48 ,  H04B1/16 ,  H04B1/00 ,  H04B1/04

CPC classification number: H04B1/48 ,  H04B1/006 ,  H04B1/0483 ,  H04B1/1615

Abstract: A front end module includes a first radio frequency (RF) terminal, a second RF terminal, a third RF terminal, a transmission path and a reception path. The transmission path is formed between the first RF terminal and the third RF terminal. The reception path is formed between the first RF terminal and the second RF terminal. The reception path includes a first set of switches, a second set of switches, a third set of switches and an amplifier. An amplifier is coupled to the second set of switches and the second RF terminal. The third set of switches is coupled to the first set of switches and the second RF terminal. When a transmission signal is transmitted to the first RF terminal via the transmission path, the first set of switches, the second set of switches and the third set of switches are turned off.