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    Dynamic latch based SPAD front end
    12.
    发明授权
    Dynamic latch based SPAD front end 有权

    公开(公告)号：US11525904B2

    公开(公告)日：2022-12-13

    申请号：US16661119

    申请日：2019-10-23

    Applicant: STMicroelectronics (Research & Development) Limited

    Inventor： John Kevin Moore ,  Neale Dutton

    IPC: G01C3/08 ,  G01S7/4913 ,  G01S17/32 ,  G01S7/48

    Abstract: A time-of-flight ranging system disclosed herein includes a receiver asserting a photon received signal in response to detection of light that has reflected off a target and returned to the time-of-flight ranging system. A first latch circuit has first and second data inputs receiving a first pair of differential timing references, the first latch circuit latching data values at its first and second data inputs to first and second data outputs based upon assertion of the photon received signal. A first counter counts latching events of the first latch circuit during which the first data output is asserted, and a second counter counts latching events of the first latch circuit during which the second data output is asserted. Processing circuitry determines distance to the target based upon counted latching events output from the first and second counters.

    ROUTING FOR DTOF SENSORS
    14.
    发明申请
    ROUTING FOR DTOF SENSORS 有权

    公开(公告)号：US20210382152A1

    公开(公告)日：2021-12-09

    申请号：US16895477

    申请日：2020-06-08

    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.

    Single reference clock time to digital converter
    15.
    发明授权
    Single reference clock time to digital converter 有权

    公开(公告)号：US10715754B2

    公开(公告)日：2020-07-14

    申请号：US15877551

    申请日：2018-01-23

    Applicant: STMicroelectronics (Research & Development) Limited

    Inventor： John Kevin Moore ,  Neale Dutton

    IPC: H04N5/376 ,  H04N5/3745 ,  H04N5/378 ,  H03M1/12 ,  H03L7/08 ,  G04F10/00

    Abstract: In an embodiment, a TDC includes: a clock input configured to receive a reference clock that is synchronized with a first event; a clock generation circuit configured to generate a first clock at a first output of the clock generation circuit based on the reference clock, the first clock having a second frequency lower than the reference clock; a data input configured to receive an input stream of pulses, where the input stream of pulses is based on the first event; a sampling circuit having an input register, the sampling circuit coupled to the data input, the sampling circuit configured to continuously sample the input stream of pulses into the input register based on the reference clock; and output terminals configured to stream time stamps based on the input stream of pulses at the second frequency, where the stream of time stamps is synchronized with the first clock.

    Digital image sensor
    18.
    发明授权
    Digital image sensor 有权
    数字图像传感器

    公开(公告)号：US09106850B2

    公开(公告)日：2015-08-11

    申请号：US13693748

    申请日：2012-12-04

    Applicant: STMicroelectronics (Research & Development) Limited

    Inventor： John Kevin Moore

    IPC: H04N5/335 ,  H04N5/353 ,  H01L27/146 ,  H01L27/148 ,  H04N5/369 ,  H04N5/3745 ,  H04N9/04

    CPC classification number: H04N5/3535 ,  H01L27/146 ,  H01L27/14603 ,  H01L27/14621 ,  H01L27/148 ,  H04N5/335 ,  H04N5/369 ,  H04N5/3745 ,  H04N9/045

    Abstract: A digital imaging sensor includes an array of pixels. A subset of the pixels in the array has reduced photosensitivity in comparison to other pixels in said array. A controller operates to control an integration time of the array of pixels such that a first integration time of the subset of pixels is longer than a second integration time of the other pixels in the array. Such an image sensor is particularly useful for sensing light sources that are not illuminated continuously.

    Abstract translation: 数字成像传感器包括像素阵列。 与所述阵列中的其他像素相比，阵列中的像素的子集具有降低的光敏性。 控制器操作以控制像素阵列的积分时间，使得像素子集的第一积分时间长于阵列中其他像素的第二积分时间。 这种图像传感器特别适用于感测不被连续照射的光源。

    Routing for DTOF sensors
    19.
    发明授权
    Routing for DTOF sensors 有权

    公开(公告)号：US11822017B2

    公开(公告)日：2023-11-21

    申请号：US17868261

    申请日：2022-07-19

    Applicant: STMicroelectronics (Research & Development) Limited

    Inventor： Neale Dutton ,  John Kevin Moore

    IPC: G06V20/64 ,  G01S7/4863 ,  G01S17/89

    CPC classification number: 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.

    LIDAR system utilizing multiple networked LIDAR integrated circuits
    20.
    发明授权
    LIDAR system utilizing multiple networked LIDAR integrated circuits 有权

    公开(公告)号：US11579290B2

    公开(公告)日：2023-02-14

    申请号：US16432682

    申请日：2019-06-05

    Applicant: STMicroelectronics (Research & Development) Limited

    Inventor： John Kevin Moore

    IPC: G01S17/00 ,  G01S17/10 ,  G01S17/931

    Abstract: A ranging system includes a first ranging unit with a first laser driver, a first control circuit generating a first trigger signal, and a first data interface with a first trigger transmitter transmitting the first trigger signal over a first data transmission line and a first calibration receiver receiving a first calibration signal over a second data transmission line. A second ranging unit includes a second laser driver, a second data interface with a second trigger receiver receiving the first trigger signal and a second calibration transmitter transmitting the first calibration signal, and a second control circuit generating the first calibration signal in response to receipt of the first trigger signal. The first control circuit determines an elapsed time between transmission of the first trigger signal and receipt of the first calibration signal. The determined elapsed time is used to synchronize activation of the first and second laser drivers.

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