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：US20250158647A1

公开(公告)日：2025-05-15

申请号：US18540894

申请日：2023-12-15

Applicant: RichWave Technology Corp.

Inventor： Yu-Hsuan Chao ,  Chih-Sheng Chen

IPC: H04B1/04 ,  H04B1/00

Abstract: A radio frequency (RF) amplification circuit has an input terminal for receiving an RF input signal, an output terminal for providing an RF output signal, an amplification path, and a bypass path. The amplification path is coupled between the input terminal and output terminal and includes an amplifier. The bypass path and the amplification path are coupled in parallel between the input terminal and the output terminal, and the bypass path includes a bypass switch, a first node, a second node, a wiring segment, and a variable capacitive structure. The first node is located between the input terminal and the bypass switch. The second node is located between the first node and the bypass switch. The wiring segment is coupled between the first node and second node. The variable capacitive structure is coupled between the first and second nodes and includes a capacitive element and a switching element.

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.