公开(公告)号：US20150260571A1

公开(公告)日：2015-09-17

申请号：US14644308

申请日：2015-03-11

Applicant: Texas Instruments Incorporated

Inventor： Jagannathan Venkataraman ,  Prabu Sankar Thirugnanam ,  Raja Reddy Patukuri ,  Sandeep Kesrimal Oswal

IPC: G01J1/44 ,  H03M3/00 ,  H01L27/144

CPC classification number: H03M3/30 ,  H03M3/402 ,  H03M3/43 ,  H03M3/494

Abstract: The disclosure provides a receiver with high dynamic range. The receiver includes a photodiode that generates a current signal. A coupling capacitor is coupled to the photodiode, and generates a modulation signal in response to the current signal received from the photodiode. A sigma delta analog to digital converter (ADC) is coupled to the coupling capacitor, and generates a digital data in response to the modulation signal. A digital mixer is coupled to the sigma delta ADC, and generates an in-phase component and a quadrature component corresponding to the digital data. A processor is coupled to the digital mixer, and processes the in-phase component and the quadrature component corresponding to the digital data.

Abstract translation: 本公开提供了具有高动态范围的接收机。 接收器包括产生电流信号的光电二极管。 耦合电容器耦合到光电二极管，并且响应于从光电二极管接收的电流信号而产生调制信号。 Σ-Δ模数转换器（ADC）耦合到耦合电容器，并且响应于调制信号产生数字数据。 数字混频器耦合到Σ-ΔADC，并产生对应于数字数据的同相分量和正交分量。 处理器耦合到数字混频器，并处理与数字数据相对应的同相分量和正交分量。

公开(公告)号：US12095431B2

公开(公告)日：2024-09-17

申请号：US17362443

申请日：2021-06-29

Applicant: Texas Instruments Incorporated

Inventor： Sandeep Oswal ,  Raja Reddy Patukuri ,  Aravind Miriyala ,  Anand Hariraj Udupa ,  Hari Babu Tippana ,  Aatish Chandak

IPC: H03F3/45 ,  A61B5/308

CPC classification number: H03F3/45475 ,  A61B5/308 ,  H03F2200/165

Abstract: An ECG signal acquisition system includes a first amplifier which has a non-inverting input adapted to be coupled to a first differential input, an inverting input adapted to be coupled to a second differential input, and an output. The system includes first and second biasing resistors coupled between the non-inverting and inverting inputs of the first amplifier. The system includes an average estimation circuit which has a first input coupled to the non-inverting input of the first amplifier and a second input coupled to the inverting input of the first amplifier. The system includes a driver amplifier which has an inverting input coupled to the output of the average estimation circuit, a non-inverting input coupled to receive a reference common-mode voltage, and an output. The system includes a low-pass filter coupled between the output of the driver amplifier and the biasing resistors.

公开(公告)号：US20240027508A1

公开(公告)日：2024-01-25

申请号：US18128912

申请日：2023-03-30

Applicant: Texas Instruments Incorporated

Inventor： Aatish Chandak ,  Aravind Miriyala ,  Midhun Raveendran ,  Anand Hariraj Udupa ,  Raja Reddy Patukuri ,  Prabin Krishna Yadav

IPC: G01R31/00 ,  A61B5/053

CPC classification number: G01R31/002 ,  A61B5/053 ,  A61B2560/0223

Abstract: An example apparatus includes: calibration circuitry configured to determine a second current at a second terminal of a second impedance circuit based on a first parasitic capacitance, a first impedance value, a third impedance value, a first voltage, and a second voltage; determine a third voltage at a second terminal of a second impedance circuit based on the first parasitic capacitance, a second impedance value, the third impedance value, the second voltage, and the second current; and determine a second parasitic capacitance between the second terminal of the second impedance circuit and the second terminal of a fifth impedance circuit based on the second current, the third voltage, a third current at the second terminal of the fifth impedance circuit, and a fourth voltage at the second terminal of the fifth impedance circuit.

公开(公告)号：US20230341528A1

公开(公告)日：2023-10-26

申请号：US18343159

申请日：2023-06-28

Applicant: Texas Instruments Incorporated

Inventor： Yichang Wang ,  Karthik Rajagopal Ganapathy ,  Raja Reddy Patukuri

IPC: G01S7/4865 ,  G05D1/00 ,  G01S17/89 ,  B25J9/16

CPC classification number: G01S7/4865 ,  G05D1/0088 ,  G01S17/89 ,  B25J9/163

Abstract: A system comprises a photosensor and a controller. A first photoemitter transmits light onto objects at first height, a second photoemitter onto objects at second, lower height, and a third photoemitter onto objects at third, lowest height. The controller causes one of the photoemitters to transmit modulated light and the photosensor to receive reflections from a scene. The controller determines a depth map for the corresponding height based on phase differences between the transmitted and reflected light. In some examples, the system is included in an autonomous robot's navigation system. The navigation system identifies overhanging objects at the robot's top from the depth map at the first height, obstacles in the navigation route from a second depth map at the second height, and cliffs and drop-offs in the ground surface in front of the robot from the third depth map at the third height.

公开(公告)号：US11233525B2

公开(公告)日：2022-01-25

申请号：US16748849

申请日：2020-01-22

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jagannathan Venkataraman ,  Prabu Sankar Thirugnanam ,  Raja Reddy Patukuri ,  Sandeep Kesrimal Oswal

IPC: H03M3/00

Abstract: The disclosure provides a receiver with high dynamic range. The receiver includes a photodiode that generates a current signal. A coupling capacitor is coupled to the photodiode, and generates a modulation signal in response to the current signal received from the photodiode. A sigma delta analog to digital converter (ADC) is coupled to the coupling capacitor, and generates a digital data in response to the modulation signal. A digital mixer is coupled to the sigma delta ADC, and generates an in-phase component and a quadrature component corresponding to the digital data. A processor is coupled to the digital mixer, and processes the in-phase component and the quadrature component corresponding to the digital data.

公开(公告)号：US20210003523A1

公开(公告)日：2021-01-07

申请号：US16852736

申请日：2020-04-20

Applicant: Texas Instruments Incorporated

Inventor： Aatish Chandak ,  Raja Reddy Patukuri ,  Aravind Miriyala ,  Sandeep Oswal

IPC: G01N27/02 ,  A61B5/053 ,  A61B5/00

Abstract: The disclosure provides a measurement circuit. The measurement circuit includes a control engine. An excitation source is coupled to the control engine. A first set of electrodes and a second set of electrodes are coupled to the excitation source and receive current from the excitation source. The control engine operates the excitation source in a first mode and a second mode. The control engine, in the first mode, measures a parasitic impedance associated with the first and the second set of electrodes, and the control engine, in the second mode, measures an impedance of the first and the second set of electrodes and of an external object.

公开(公告)号：US20180234107A1

公开(公告)日：2018-08-16

申请号：US15950690

申请日：2018-04-11

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jagannathan Venkataraman ,  Prabu Sankar Thirugnanam ,  Raja Reddy Patukuri ,  Sandeep Kesrimal Oswal

IPC: H03M3/00

CPC classification number: H03M3/30 ,  H03M3/402 ,  H03M3/43 ,  H03M3/494

Abstract: The disclosure provides a receiver with high dynamic range. The receiver includes a photodiode that generates a current signal. A coupling capacitor is coupled to the photodiode, and generates a modulation signal in response to the current signal received from the photodiode. A sigma delta analog to digital converter (ADC) is coupled to the coupling capacitor, and generates a digital data in response to the modulation signal. A digital mixer is coupled to the sigma delta ADC, and generates an in-phase component and a quadrature component corresponding to the digital data. A processor is coupled to the digital mixer, and processes the in-phase component and the quadrature component corresponding to the digital data.