公开(公告)号：US20230077479A1

公开(公告)日：2023-03-16

申请号：US17853945

申请日：2022-06-30

Applicant: MEDIATEK INC.

Inventor： Sung-Han Wen ,  Yu-Hung Lin ,  Shih-Hsiung Chien ,  Chi-Heng Chung

IPC: H03F3/21 ,  H03F3/393 ,  H03F3/16

Abstract: The present invention provides an amplifier including an input stage, an amplifier stage, a power stage and a de-gain stage. The input stage is configured to receive an input signal to generate an amplified signal. The amplifier stage is configured to generate a first driving signal and a second driving signal according to the amplified signal. The power stage comprises a first input terminal and a second input terminal, wherein the power stage is coupled to a supply voltage and a ground voltage, for receiving the first driving signal and the second driving signal from the first input terminal and the second input terminal, respectively, and generating an output signal.

公开(公告)号：US11497411B2

公开(公告)日：2022-11-15

申请号：US16680504

申请日：2019-11-12

Applicant: MEDIATEK INC.

Inventor： Chih-Hsin Chen ,  Yu-Hung Lin

IPC: A61B5/053 ,  G01N27/02

Abstract: The present invention provides a circuit applied to a bio-information acquisition system, wherein the circuit includes a terminal, an output circuit, a feedback circuit and a calibration circuit. In the operations of the circuit, the terminal is arranged to receive an input signal, the output circuit is configured to generate an output signal according to the input signal, the feedback circuit is configured to receive the output signal to generate a current signal to the terminal, and the calibration circuit is configured to generate a control signal to control the feedback circuit to determine a level of the current signal according to the output signal.

公开(公告)号：US20210075386A1

公开(公告)日：2021-03-11

申请号：US16921922

申请日：2020-07-06

Applicant: MEDIATEK INC.

Inventor： Yu-Hung Lin ,  Kuan-Ta Chen

IPC: H03F3/45

Abstract: An operational amplifier includes a single-stage amplifier and a current controller. The single-stage amplifier receives an input signal, and amplifies the input signal to generate an output signal, wherein the single-stage amplifier includes a voltage controlled current source circuit that operates in response to a bias voltage input. The current controller receives the input signal, and generates the bias voltage input according to the input signal.

公开(公告)号：US20200163577A1

公开(公告)日：2020-05-28

申请号：US16680504

申请日：2019-11-12

Applicant: MEDIATEK INC.

Inventor： Chih-Hsin Chen ,  Yu-Hung Lin

IPC: A61B5/053 ,  G01N27/02

Abstract: The present invention provides a circuit applied to a bio-information acquisition system, wherein the circuit includes a terminal, an output circuit, a feedback circuit and a calibration circuit. In the operations of the circuit, the terminal is arranged to receive an input signal, the output circuit is configured to generate an output signal according to the input signal, the feedback circuit is configured to receive the output signal to generate a current signal to the terminal, and the calibration circuit is configured to generate a control signal to control the feedback circuit to determine a level of the current signal according to the output signal.

公开(公告)号：US11664774B2

公开(公告)日：2023-05-30

申请号：US17736062

申请日：2022-05-03

Applicant: MEDIATEK INC.

Inventor： Yu-Hung Lin ,  Kuan-Ta Chen

IPC: H03F3/45

CPC classification number: H03F3/45179 ,  H03F2203/45248 ,  H03F2203/45508

Abstract: An operational amplifier includes a single-stage amplifier and a current controller. The single-stage amplifier receives an input signal, and amplifies the input signal to generate an output signal, wherein the single-stage amplifier includes a voltage controlled current source circuit that operates in response to a bias voltage input. The current controller receives the input signal, and generates the bias voltage input according to the input signal. The bias voltage input includes a first bias voltage, a second bias voltage, a third bias voltage, and a fourth bias voltage. None of the first bias voltage, the second bias voltage, the third bias voltage, and the fourth bias voltage is directly set by the input signal of the single-stage amplifier.

公开(公告)号：US20220263480A1

公开(公告)日：2022-08-18

申请号：US17736062

申请日：2022-05-03

Applicant: MEDIATEK INC.

Inventor： Yu-Hung Lin ,  Kuan-Ta Chen

IPC: H03F3/45

Abstract: An operational amplifier includes a single-stage amplifier and a current controller. The single-stage amplifier receives an input signal, and amplifies the input signal to generate an output signal, wherein the single-stage amplifier includes a voltage controlled current source circuit that operates in response to a bias voltage input. The current controller receives the input signal, and generates the bias voltage input according to the input signal. The bias voltage input includes a first bias voltage, a second bias voltage, a third bias voltage, and a fourth bias voltage. None of the first bias voltage, the second bias voltage, the third bias voltage, and the fourth bias voltage is directly set by the input signal of the single-stage amplifier.

公开(公告)号：US11349443B2

公开(公告)日：2022-05-31

申请号：US16921922

申请日：2020-07-06

Applicant: MEDIATEK INC.

Inventor： Yu-Hung Lin ,  Kuan-Ta Chen

IPC: H03F3/45

Abstract: An operational amplifier includes a single-stage amplifier and a current controller. The single-stage amplifier receives an input signal, and amplifies the input signal to generate an output signal, wherein the single-stage amplifier includes a voltage controlled current source circuit that operates in response to a bias voltage input. The current controller receives the input signal, and generates the bias voltage input according to the input signal.