公开(公告)号：US11424783B2

公开(公告)日：2022-08-23

申请号：US17129823

申请日：2020-12-21

Applicant: MEDIATEK INC.

Inventor： Wei-Chia Chan ,  Tse-Yu Chen ,  Hui-Hsien Liu ,  Jui-Lin Hsu ,  Chun-Wei Lin

IPC: H04B1/44 ,  H04B1/04

Abstract: A transceiver includes a radio-frequency (RF) front-end circuit, a dedicated RF front-end circuit, and a switchable matching circuit. The RF front-end circuit deals with communications of at least a first wireless communication standard. The dedicated RF front-end circuit deals with communications of a second wireless communication standard only. The switchable matching circuit is coupled to the RF front-end circuit, the dedicated RF front-end circuit, and a signal port of a chip. The switchable matching circuit provides impedance matching between the signal port and the RF front-end circuit when the RF front-end circuit is in operation, and provides impedance matching between the signal port and the dedicated RF front-end circuit when the dedicated RF front-end circuit is in operation. The RF front-end circuit, the dedicated RF front-end circuit, and the switchable matching circuit are integrated in the chip.

公开(公告)号：US20220385330A1

公开(公告)日：2022-12-01

申请号：US17864388

申请日：2022-07-13

Applicant: MEDIATEK INC.

Inventor： Wei-Chia Chan ,  Tse-Yu Chen ,  Hui-Hsien Liu ,  Jui-Lin Hsu ,  Chun-Wei Lin

IPC: H04B1/44

Abstract: A transceiver includes: a radio-frequency (RF) front-end circuit; a dedicated RF front-end circuit; and a switchable matching circuit, integrated in a chip. The RF front-end circuit deals with communications of a first wireless standard, and the dedicated RF front-end circuit deals with communications of a second wireless standard. The switchable matching circuit provides impedance matching between the signal port and the RF front-end circuit when the RF front-end circuit is in operation, and provides impedance matching between the signal port and the dedicated RF front-end circuit when the dedicated RF front-end circuit is in operation, and includes: a first capacitive circuit coupled to the signal port; a first switch circuit coupled between the first capacitive circuit and the dedicated RF front-end circuit; a second capacitive circuit coupled to the dedicated RF front-end circuit; and a second switch circuit coupled to a second terminal of the second capacitive circuit.

公开(公告)号：US11799511B2

公开(公告)日：2023-10-24

申请号：US17864388

申请日：2022-07-13

Applicant: MEDIATEK INC.

Inventor： Wei-Chia Chan ,  Tse-Yu Chen ,  Hui-Hsien Liu ,  Jui-Lin Hsu ,  Chun-Wei Lin

IPC: H04B1/44 ,  H04B1/04

CPC classification number: H04B1/44

Abstract: A transceiver includes: a radio-frequency (RF) front-end circuit; a dedicated RF front-end circuit; and a switchable matching circuit, integrated in a chip. The RF front-end circuit deals with communications of a first wireless standard, and the dedicated RF front-end circuit deals with communications of a second wireless standard. The switchable matching circuit provides impedance matching between the signal port and the RF front-end circuit when the RF front-end circuit is in operation, and provides impedance matching between the signal port and the dedicated RF front-end circuit when the dedicated RF front-end circuit is in operation, and includes: a first capacitive circuit coupled to the signal port; a first switch circuit coupled between the first capacitive circuit and the dedicated RF front-end circuit; a second capacitive circuit coupled to the dedicated RF front-end circuit; and a second switch circuit coupled to a second terminal of the second capacitive circuit.

公开(公告)号：US20240345147A1

公开(公告)日：2024-10-17

申请号：US18419580

申请日：2024-01-23

Applicant: MEDIATEK INC.

Inventor： Wei-Chia Chan ,  Hui-Hsien Liu

IPC: G01R27/26

CPC classification number: G01R27/26

Abstract: A detection circuit and a method for detecting a change in an output impedance of a transmitting circuit are provided. The detection circuit includes at least one transmitted signal strength indicator (TSSI) circuit and a controller, wherein the controller is coupled to the at least one TSSI circuit. The at least one TSSI circuit is configured to generate a first TSSI result of the transmitting circuit according to a first phase shift and generate a second TSSI result of the transmitting circuit according to a second phase shift. The controller is configured to determine whether the change in the output impedance of the transmitting circuit is detected or not according to the first TSSI result and the second TSSI result.

公开(公告)号：US20210203373A1

公开(公告)日：2021-07-01

申请号：US17129823

申请日：2020-12-21

Applicant: MEDIATEK INC.

Inventor： Wei-Chia Chan ,  Tse-Yu Chen ,  Hui-Hsien Liu ,  Jui-Lin Hsu ,  Chun-Wei Lin

IPC: H04B1/44

Abstract: A transceiver includes a radio-frequency (RF) front-end circuit, a dedicated RF front-end circuit, and a switchable matching circuit. The RF front-end circuit deals with communications of at least a first wireless communication standard. The dedicated RF front-end circuit deals with communications of a second wireless communication standard only. The switchable matching circuit is coupled to the RF front-end circuit, the dedicated RF front-end circuit, and a signal port of a chip. The switchable matching circuit provides impedance matching between the signal port and the RF front-end circuit when the RF front-end circuit is in operation, and provides impedance matching between the signal port and the dedicated RF front-end circuit when the dedicated RF front-end circuit is in operation. The RF front-end circuit, the dedicated RF front-end circuit, and the switchable matching circuit are integrated in the chip.