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    Routing For DTOF Sensors
    32.
    发明申请
    Routing For DTOF Sensors 有权

    公开(公告)号：US20220357435A1

    公开(公告)日：2022-11-10

    申请号：US17868261

    申请日：2022-07-19

    Applicant: STMicroelectronics (Research & Development) Limited

    Inventor： Neale Dutton ,  John Kevin Moore

    IPC: G01S7/4863 ,  G01S17/89

    Abstract: A ToF sensor includes an array of pixels having first and second subsets of pixels, first and second pluralities of TDCs, a routing bus having first and second pluralities of bus drivers, and a controller configured to: when the first subset of pixels is active and the second subset of pixels is not active, control the first plurality of bus drivers to route events from half of the pixels of the first subset to the first plurality of TDCs and control the first and second pluralities of bus drivers to route events from the other half of the pixels of the first subset to the second plurality of TDCs, and when the first subset of pixels is not active and the second subset of pixels is active, control the first plurality of bus drivers to route events from the second subset of pixels to the first plurality of TDCs.

    Anode sensing circuit for single photon avalanche diodes
    33.
    发明授权
    Anode sensing circuit for single photon avalanche diodes 有权

    公开(公告)号：US11349042B2

    公开(公告)日：2022-05-31

    申请号：US16718762

    申请日：2019-12-18

    Applicant: STMicroelectronics (Research & Development) Limited

    Inventor： Mohammed Al-Rawhani ,  Neale Dutton ,  John Kevin Moore ,  Bruce Rae ,  Elsa Lacombe

    IPC: H04N5/378 ,  H01L31/107 ,  H01L27/146 ,  H01L31/02 ,  H04N5/3745

    Abstract: A pixel includes a single photon avalanche diode (SPAD) having a cathode coupled to a high voltage supply through a quenching element, with the SPAD having a capacitance at its anode formed from a deep trench isolation, with the quenching element having a sufficiently high resistance such that the capacitance is not fully charged when the SPAD is struck by an incoming photon. The pixel includes a clamp transistor configured to be controlled by a voltage clamp control signal to clamp voltage at an anode of the SPAD when the SPAD is struck by an incoming photon to be no more than a threshold clamped anode voltage, and readout circuitry coupled to receive the clamped anode voltage from the clamp transistor and to generate a pixel output therefrom. The threshold clamped anode voltage is below a maximum operating voltage rating of transistors forming the readout circuitry.

    Apparatus for controlling driver current for illumination source
    36.
    发明授权
    Apparatus for controlling driver current for illumination source 有权

    公开(公告)号：US10903313B2

    公开(公告)日：2021-01-26

    申请号：US15638834

    申请日：2017-06-30

    Applicant: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED

    Inventor： John Kevin Moore ,  Caixin Zhuang

    IPC: G01S17/10 ,  G01S7/497 ,  H05B45/00 ,  H05B47/18 ,  G01S7/4863 ,  G09G3/3216 ,  G09G3/3283 ,  H01L29/06 ,  H01L31/02 ,  H01L31/107

    Abstract: A single photon avalanche diode based range detecting apparatus includes a reference array of single photon avalanche diodes configured to receive light from an illumination source via an internally coupled path. A return array of single photon avalanche diodes is configured to receive light from the illumination source via an external free space path. A calibration pulse generator is configured to generate a calibration signal pulse. Readout circuitry is configured to receive an output of the reference array via a reference signal path, an output of the return array via a return signal path, and an output of the calibration pulse generator via a calibration signal path. The readout circuitry is configured to determine a delay difference value between the reference signal path and the return signal path based on the output of the calibration pulse generator via the calibration signal path.

    Light communications receiver and decoder with time to digital converters
    39.
    发明授权
    Light communications receiver and decoder with time to digital converters 有权

    公开(公告)号：US10132921B2

    公开(公告)日：2018-11-20

    申请号：US15342028

    申请日：2016-11-02

    Applicant: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED

    Inventor： Neale Dutton ,  John Kevin Moore

    IPC: G01S7/487 ,  G01S7/486 ,  G04F10/00 ,  G01J1/44

    Abstract: The present disclosure includes a method that includes generating a decoded output signal that corresponds to reflected light received by a plurality of single photon avalanche diodes (SPAD) by removing ambient light from a plurality of SPAD array output signals. The removing of ambient light including synchronizing the plurality of SPAD array output signals by using a plurality of parallel time to digital converters, each time to digital converter outputting a synchronized SPAD array output signal, determining a plurality of flexible thresholds for each one of the synchronized SPAD array output signals, comparing current data on the synchronized SPAD array output signals with the respective ones of the flexible threshold in a filter, and outputting the first output signal.

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