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    CARRIER MODULATION RANGING USING SPADS
    7.
    发明公开
    CARRIER MODULATION RANGING USING SPADS 审中-公开

    公开(公告)号：US20240077592A1

    公开(公告)日：2024-03-07

    申请号：US17939471

    申请日：2022-09-07

    申请人： STMicroelectronics (Research & Development) Limited

    发明人： John Kevin Moore

    IPC分类号： G01S7/4861 ,  G01S7/4865 ,  G01S17/10

    CPC分类号： G01S7/4861 ,  G01S7/4865 ,  G01S17/10

    摘要： An optical ranging system includes: a first phase-locked loop (PLL) configured to generate a first frequency signal and a second frequency signal; a second PLL configured to generate a third frequency signal based on a control signal that is formed using the first frequency signal; an optical source coupled to the second PLL, where an intensity of an optical signal emitted by the optical source is configured to be modulated in accordance with the third frequency signal; a first single-photon avalanche diode (SPAD) configured to receive a reflected optical signal; a time-to-digital converter (TDC) coupled to the first SPAD, where the TDC is configured to generate digital samples by sampling an output signal of the first SPAD under control of the second frequency signal; a reference signal generator configured to generate a reference signal; and a mixer configured to mix the reference signal and the digital samples from the TDC.

    Time to digital converter
    8.
    发明授权
    Time to digital converter 有权

    公开(公告)号：US11885915B2

    公开(公告)日：2024-01-30

    申请号：US16834347

    申请日：2020-03-30

    申请人： STMicroelectronics (Research & Development) Limited

    发明人： Neale Dutton ,  John Kevin Moore

    IPC分类号： G01S7/4865 ,  G01S17/10 ,  G01S17/89

    CPC分类号： G01S7/4865 ,  G01S17/10 ,  G01S17/89

    摘要： In an embodiment, a method includes: receiving a first plurality of digital codes from a time-to-digital converter (TDC); TDC; generating a coarse histogram from the first plurality of digital codes; detecting a peak coarse bin from the plurality of coarse bins; after receiving the first plurality of digital codes, receiving a second plurality of digital codes from the TDC; and generating a fine histogram from the second plurality of digital codes based on the detected peak coarse bin, where a fine histogram depth range is narrower than a coarse histogram depth range, where a lowest fine histogram depth is lower or equal to a lowest coarse peak depth, and where a highest fine histogram depth is higher or equal to a highest coarse peak depth.

    Photodiode including an additional depletion region for sensitivity control and method of creating the same
    9.
    发明授权
    Photodiode including an additional depletion region for sensitivity control and method of creating the same 有权

    公开(公告)号：US11251317B2

    公开(公告)日：2022-02-15

    申请号：US16841412

    申请日：2020-04-06

    申请人： STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED

    发明人： John Kevin Moore

    IPC分类号： H01L31/02 ,  G01J1/44 ,  H01L31/107

    摘要： The present disclosure is directed to a diode including a first doped structure, doped with a first type of material and forming at least part of an isolation structure for the diode; at least one contact structure located within the first doped structure, the at least one contact structure forming one of the cathode or anode of the diode; a second doped structure, doped with a second type of material, and forming at least one depletion region or PN junction with the first doped structure; at least one second contact structure located within the second doped structure, the at least one second contact structure forming the other of the anode or the cathode of the diode; at least one further contact structure, doped with the first type of material, the at least one further contact structure forming at least one further depletion region or further PN junction, such that the at least one further depletion region is configured to steer charge from the at least one depletion region and thus decrease the sensitivity of the diode.

    PROXIMITY SENSOR AND METHOD OF OPERATING A PHOTODETECTOR BASED PROXIMITY SENSOR
    10.
    发明申请
    PROXIMITY SENSOR AND METHOD OF OPERATING A PHOTODETECTOR BASED PROXIMITY SENSOR 审中-公开

    公开(公告)号：US20200052694A1

    公开(公告)日：2020-02-13

    申请号：US16535369

    申请日：2019-08-08

    申请人： STMicroelectronics (Research & Development) Limited

    发明人： John Kevin Moore

    IPC分类号： H03K17/94 ,  H03K17/945 ,  H01L31/0232 ,  H01L31/12

    摘要： An apparatus can be used for detecting pile-up within circuitry associated with photodetectors. The apparatus includes an input terminal configured to receive a plurality of photodetector outputs. An OR-tree is coupled in parallel with the circuitry associated with the photodetectors. The OR-tree has an input coupled to the input terminal and is configured to combine the photodetector outputs. A counter is configured to count an output of the OR-tree. A comparator is configured to compare an output of the counter to a determined threshold value, wherein the comparator is configured to output an indicator indicating pile-up within the circuitry associated with photodetectors based on the output of the counter being greater than or equal to the determined threshold value.