Readout architecture for FMCW LiDAR

    公开(公告)号:US11988779B2

    公开(公告)日:2024-05-21

    申请号:US17011813

    申请日:2020-09-03

    CPC classification number: G01S7/4915 G01S7/4816 G01S7/4817 G01S17/06 G01S17/58

    Abstract: Provided is a readout integrated circuit of a FMCW LiDAR system includes a transimpedance amplifier to receive an optical signal of optical mixer output from balanced PIN photo diode, convert the received optical signal into a current signal including a mixed signal of high and low frequencies, and convert the current signal into a voltage signal including a low frequency sinusoidal waveform, a comparator to receive the voltage signal, and generate a pulse signal from the voltage signal, a primary counter to receive a primary signal corresponding to the pulse signal, and count a number of pulses to generate primary counter data, a reference counter to receive a reference signal, and count a number of pulses to generate reference counter data, and an arithmetic logic unit to receive the primary and reference counter data, and calculate depth information corresponding to a distance of a target.

    Three-dimensional camera system
    13.
    发明授权

    公开(公告)号:US11443447B2

    公开(公告)日:2022-09-13

    申请号:US16894705

    申请日:2020-06-05

    Abstract: A camera system. In some embodiments, the camera system includes a first laser, a camera, and a processing circuit connected to the first laser and to the camera. The first laser may be steerable, and the camera may include a pixel including a photodetector and a pixel circuit, the pixel circuit including a first time-measuring circuit.

    Human ID for mobile authentication
    15.
    发明授权

    公开(公告)号:US11321436B2

    公开(公告)日:2022-05-03

    申请号:US16520351

    申请日:2019-07-23

    Abstract: A computing device includes a system that authenticates a user of the computing device. A first sensor obtains a first representation of a physical characteristic of the user that is compared to a registered representation of the physical characteristic of the user. A first level of access to the computing device is enabled based on the first representation of the physical characteristic matching the second representation of the physical characteristic. A second sensor obtains a first representation of a liveness characteristic of the user that indicates that the user is alive. The first representation of the liveness characteristic is compared to a registered representation of the liveness characteristic of the user. A second level of access to the computing device is enabled based on the first representation of the liveness characteristic of the user matching the second representation of the liveness characteristic of the user.

    Human ID for mobile authentication
    18.
    发明授权

    公开(公告)号:US11914694B2

    公开(公告)日:2024-02-27

    申请号:US17669353

    申请日:2022-02-10

    CPC classification number: G06F21/32 G06F21/34 G06V40/45 G06V40/70 G10L17/00

    Abstract: A computing device includes a system that authenticates a user of the computing device. A first sensor obtains a first representation of a physical characteristic of the user that is compared to a registered representation of the physical characteristic of the user. A first level of access to the computing device is enabled based on the first representation of the physical characteristic matching the second representation of the physical characteristic. A second sensor obtains a first representation of a liveness characteristic of the user that indicates that the user is alive. The first representation of the liveness characteristic is compared to a registered representation of the liveness characteristic of the user. A second level of access to the computing device is enabled based on the first representation of the liveness characteristic of the user matching the second representation of the liveness characteristic of the user.

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