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    METHODS AND APPARATUS TO CAPTURE SWITCH CHARGE INJECTIONS AND COMPARATOR KICKBACK EFFECTS
    1.
    发明公开
    METHODS AND APPARATUS TO CAPTURE SWITCH CHARGE INJECTIONS AND COMPARATOR KICKBACK EFFECTS 审中-公开

    公开(公告)号：US20240213998A1

    公开(公告)日：2024-06-27

    申请号：US18129604

    申请日：2023-03-31

    Applicant: Texas Instruments Incorporated

    Inventor： Rajashekar Goroju ,  Prasanth K ,  Dileepkumar Ramesh Bhat ,  Rakul Viswanath ,  Sravana Kumar Goli ,  Rahul Sharma

    IPC: H03M1/38

    CPC classification number: H03M1/38

    Abstract: An example apparatus includes: controller circuitry configured to: provide switch signals to capacitive digital to analog converter (C-DAC) circuitry, the C-DAC circuitry including switches; configuring the switches into a third configuration begin an Auto Zero (AZ) phase with a third switch in a closed state; configuring the switches into a fourth configuration to repeat the transition of the third switch to the open state corresponding to a first configuration; configuring the switches into a fifth configuration to repeat the transition of a first switch and a second switch to the open state corresponding to a second configuration; configuring the switches into a sixth configuration to repeat the transition of the third switch to the closed state corresponding to a second configuration; and performing an AZ decision with the switches in the sixth configuration.

    Redundancy in active pixel sensors
    2.
    发明授权
    Redundancy in active pixel sensors 有权

    公开(公告)号：US10484636B2

    公开(公告)日：2019-11-19

    申请号：US15926025

    申请日：2018-03-20

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Sravana Kumar Goli ,  Jeevan Mithra ,  Nagesh Surendranath ,  Sandeep Kesrimal Oswal

    IPC: H04N5/3745 ,  H04N5/361 ,  H04N5/365 ,  H04N5/374 ,  H04N5/363

    Abstract: An active pixel sensor a plurality of sensor pixels disposed in a row, a plurality of sensor pixels in a column, and steering circuitry coupled to each of the sensor pixels. Each of the sensor pixels includes a first pixel circuit, and a second pixel circuit. For each of the sensor pixels, the steering circuitry includes a first switch, a second switch, a third switch, and a fourth switch. The first switch and the second switch are connected in series to route an input signal to the first pixel circuit. The third switch and a fourth switch are connected in parallel to route the input signal to the second pixel circuit.

    Ground noise suppression on a printed circuit board
    6.
    发明授权
    Ground noise suppression on a printed circuit board 有权

    公开(公告)号：US11152903B2

    公开(公告)日：2021-10-19

    申请号：US16660302

    申请日：2019-10-22

    Applicant: Texas Instruments Incorporated

    Inventor： Nagesh Surendranath ,  Shriram Mahendra Devi ,  Sravana Kumar Goli

    IPC: H03F3/45

    Abstract: In accordance with one embodiment, an apparatus includes a first amplifier having a noninverting input, an inverting input and an output. The noninverting input is coupled to a first ground reference. The inverting input is coupled to an output of an external sensor. The apparatus also includes a second amplifier having a noninverting input, an inverting input and an output. The noninverting input is coupled to the first ground reference. The inverting input is coupled to the power supply through a first variable capacitor and to the second ground reference through a second variable capacitor. The output is coupled to the inverting input of the first amplifier. The external sensor is coupled to a third ground reference, and the first amplifier and second amplifier are coupled to the second ground reference.

    GROUND NOISE SUPPRESSION ON A PRINTED CIRCUIT BOARD
    7.
    发明申请
    GROUND NOISE SUPPRESSION ON A PRINTED CIRCUIT BOARD 有权

    公开(公告)号：US20210119594A1

    公开(公告)日：2021-04-22

    申请号：US16660302

    申请日：2019-10-22

    Applicant: Texas Instruments Incorporated

    Inventor： Nagesh Surendranath ,  Shriram Mahendra Devi ,  Sravana Kumar Goli

    IPC: H03F3/45

    Abstract: In accordance with one embodiment, an apparatus includes a first amplifier having a noninverting input, an inverting input and an output. The noninverting input is coupled to a first ground reference. The inverting input is coupled to an output of an external sensor. The apparatus also includes a second amplifier having a noninverting input, an inverting input and an output. The noninverting input is coupled to the first ground reference. The inverting input is coupled to the power supply through a first variable capacitor and to the second ground reference through a second variable capacitor. The output is coupled to the inverting input of the first amplifier. The external sensor is coupled to a third ground reference, and the first amplifier and second amplifier are coupled to the second ground reference.

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