公开(公告)号：US20210131865A1

公开(公告)日：2021-05-06

申请号：US16674758

申请日：2019-11-05

Applicant: Texas Instruments Incorporated

Inventor： Tianhong Yang ,  Grant Evan Falkenburg

IPC: G01J1/46 ,  H03F3/45 ,  G01N15/06

Abstract: An example apparatus includes: a first voltage source, a first amplifier having a noninverting input adapted to be coupled to a photodiode anode and coupled to the first voltage source, an inverting input adapted to be coupled to a photodiode cathode, and an output, a first resistor coupled to the first amplifier inverting input and to the first amplifier output, a first capacitor coupled to the inverting input of the first amplifier and the first amplifier output, and a second voltage source different from the first voltage source. There is a second amplifier having a noninverting input, an inverting input and an output. The noninverting input is coupled to the output of the first amplifier, the inverting input is coupled to the second voltage source, and there is a second resistor coupled to the inverting input and the output of the second amplifier.

公开(公告)号：US20240259010A1

公开(公告)日：2024-08-01

申请号：US18455656

申请日：2023-08-25

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Xiaochun Zhao ,  Abidur Rahman ,  Eung Jung Kim ,  Tianhong Yang ,  Huijuan Li

IPC: H03K17/0812

CPC classification number: H03K17/0812

Abstract: A transistor is coupled between a first voltage input and a voltage output in a first current path. First circuitry is coupled to a second voltage input, a control terminal of the transistor, and the voltage output. Second circuitry is coupled between the control terminal and ground in a second current path and between the control terminal and ground in a third current path parallel to the second current path. The second current path includes the control terminal, first and second terminals of the second circuitry, and ground. The third current path includes the control terminal, a second and the third terminal of the second circuitry, and ground. Third circuitry is coupled between the control terminal and the voltage output in a fourth current path. The fourth current path includes the control terminal, first and second terminals of the third circuitry, and the voltage output.

公开(公告)号：US11595034B2

公开(公告)日：2023-02-28

申请号：US17538547

申请日：2021-11-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Cameron Wayne Phillips ,  Wenchao Qu ,  Tianhong Yang ,  Md Abidur Rahman

IPC: H03K17/0412 ,  H03K17/693 ,  H03K17/082

Abstract: A load switch includes a switch input, a switch output, a first field-effect transistor (FET), and a second FET. The switch input is adapted to be coupled to a controller output of a controller. The switch output is adapted to be coupled to a controller input of the controller. The first FET has a gate and a source. The gate of the first FET is coupled to the switch input. The second FET has a gate and a source. The gate of the second FET is coupled to the source of the first FET. The source of the second FET is coupled to the switch output.

公开(公告)号：US11526191B2

公开(公告)日：2022-12-13

申请号：US16781549

申请日：2020-02-04

Applicant: Texas Instruments Incorporated

Inventor： Sreejish Sreenivasan ,  Mehedi Hassan ,  Tianhong Yang

IPC: G05F3/30 ,  H03M1/10 ,  G05F3/26 ,  G05F1/46

Abstract: An electronic device includes a precision reference circuit, which contains a bandgap reference circuit and an offset-correction circuit. The bandgap reference circuit has an output that is coupled to provide a bandgap reference voltage and an intermediate node that is separated from the output by a transimpedance resistor. The offset-correction circuit is coupled to the bandgap reference circuit and includes a DAC. The DAC is coupled to the intermediate node and is also coupled to receive an external digital value. The external digital value determines a fraction of a correction current that will be passed by the DAC.

公开(公告)号：US20210240213A1

公开(公告)日：2021-08-05

申请号：US16781549

申请日：2020-02-04

Applicant: Texas Instruments Incorporated

Inventor： Sreejish Sreenivasan ,  Mehedi Hassan ,  Tianhong Yang

IPC: G05F3/30 ,  H03M1/10

Abstract: An electronic device includes a precision reference circuit, which contains a bandgap reference circuit and an offset-correction circuit. The bandgap reference circuit has an output that is coupled to provide a bandgap reference voltage and an intermediate node that is separated from the output by a transimpedance resistor. The offset-correction circuit is coupled to the bandgap reference circuit and includes a DAC. The DAC is coupled to the intermediate node and is also coupled to receive an external digital value. The external digital value determines a fraction of a correction current that will be passed by the DAC.