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：US20230119449A1

公开(公告)日：2023-04-20

申请号：US17963209

申请日：2022-10-11

Applicant: MEDIATEK INC.

Inventor： Tse-Yu Chen ,  Chun-Wei Lin

IPC: H04B1/40

Abstract: A transceiver and a method for controlling a configuration of the transceiver are provided. The transceiver includes a power amplifier, a receiver and a transformer, wherein the transformer includes a first inductor coupled to the power amplifier, and a second inductor coupled to the receiver. The power amplifier is configured to output transmitted signals when the transceiver operates in a transmitting mode. The receiver is configured to receive a received signal when the transceiver operates in a receiving mode. More particularly, voltage levels of a first end and a second end of the first inductor are pulled to a same voltage level when the transceiver operates in the receiving mode.

公开(公告)号：US12003218B2

公开(公告)日：2024-06-04

申请号：US17947192

申请日：2022-09-19

Applicant: MEDIATEK INC.

Inventor： Tse-Yu Chen ,  Chun-Wei Lin

IPC: H03D7/14 ,  H03F3/45

CPC classification number: H03D7/1491 ,  H03D7/1441 ,  H03F3/45183

Abstract: A mixer with a filtering function and a method for linearization of the mixer are provided. The mixer includes at least one amplifier, a transconductance device and a feedback network. The at least one amplifier is configured to output a filtered voltage signal according to an input voltage signal. The transconductance device is coupled to the at least one amplifier, and is configured to generate a filtered current signal according to the filtered voltage signal. The feedback network is coupled between any output terminal among at least one output terminal of the transconductance device and an input terminal of the at least one amplifier. More particularly, the mixer is configured to output a modulated signal according to the filtered current signal.

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：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.