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    Ambient light sensor and method
    1.
    发明授权
    Ambient light sensor and method 有权

    公开(公告)号：US11713998B2

    公开(公告)日：2023-08-01

    申请号：US17663915

    申请日：2022-05-18

    Applicant: STMicroelectronics (Grenoble 2) SAS ,  STMicroelectronics International N.V.

    Inventor： Nicolas Moeneclaey ,  Sri Ram Gupta ,  Sarika Kushwaha

    IPC: G01J1/42 ,  G01J1/44

    CPC classification number: G01J1/4204 ,  G01J1/44 ,  G01J2001/446

    Abstract: According to one aspect, an ambient-light sensor includes a photodiode configured to generate an electrical signal according to an ambient light, a capacitive-feedback transimpedance amplifier connected at its input to the photodiode for receiving a signal generated by the photodiode and for generating as an output an amplified signal from the signal generated by the photodiode, and an auto-zero switch at the input of the capacitive-feedback transimpedance amplifier. The ambient-light sensor further includes a control circuit including a bootstrap circuit configured to receive an initial positive- or zero-voltage logic control signal, and then generate, from this initial logic control signal, an adapted logic control signal having a first positive voltage level and a second negative voltage control level for controlling the auto-zero switch.

    METHOD FOR MEASURING AMBIENT LIGHT AND CORRESPONDING INTEGRATED DEVICE
    2.
    发明申请
    METHOD FOR MEASURING AMBIENT LIGHT AND CORRESPONDING INTEGRATED DEVICE 有权

    公开(公告)号：US20220155143A1

    公开(公告)日：2022-05-19

    申请号：US17500432

    申请日：2021-10-13

    Applicant: STMicroelectronics (Grenoble 2) SAS

    Inventor： Nicolas Moeneclaey

    IPC: G01J1/42 ,  G01J1/44

    Abstract: In an embodiment a method for measuring ambient light includes successively synchronizing optical signal acquisition phases with extinction phases of a disruptive light source, wherein the disruptive light source periodically provides illumination phases and the extinction phases, accumulating, in each acquisition phase, photo-generated charges by at least one photosensitive pixel comprising a pinned photodiode, transferring the accumulated photo-generated charges to an integration node and integrating, for each pixel, the transferred charges on the integration node during a series of the successive acquisition phases.

    AMBIENT LIGHT SENSOR AND METHOD
    5.
    发明申请
    AMBIENT LIGHT SENSOR AND METHOD 有权

    公开(公告)号：US20220373388A1

    公开(公告)日：2022-11-24

    申请号：US17663915

    申请日：2022-05-18

    Applicant: STMicroelectronics (Grenoble 2) SAS ,  STMicroelectronics International N.V.

    Inventor： Nicolas Moeneclaey ,  Sri Ram Gupta ,  Sarika Kushwaha

    IPC: G01J1/42 ,  G01J1/44

    Abstract: According to one aspect, an ambient-light sensor includes a photodiode configured to generate an electrical signal according to an ambient light, a capacitive-feedback transimpedance amplifier connected at its input to the photodiode for receiving a signal generated by the photodiode and for generating as an output an amplified signal from the signal generated by the photodiode, and an auto-zero switch at the input of the capacitive-feedback transimpedance amplifier. The ambient-light sensor further includes a control circuit including a bootstrap circuit configured to receive an initial positive- or zero-voltage logic control signal, and then generate, from this initial logic control signal, an adapted logic control signal having a first positive voltage level and a second negative voltage control level for controlling the auto-zero switch.

    LIGHT SENSOR
    6.
    发明申请
    LIGHT SENSOR 有权

    公开(公告)号：US20220341779A1

    公开(公告)日：2022-10-27

    申请号：US17660321

    申请日：2022-04-22

    Applicant: STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED ,  STMicroelectronics (Grenoble 2) SAS

    Inventor： Jeffrey M. Raynor ,  Nicolas Moeneclaey

    IPC: G01J1/44

    Abstract: The present disclosure relates to a sensor having pixels, each pixel having photodiodes having each a terminal coupled to a first node associated with the photodiode; and an amplifier having a first part and, for each photodiode, a second part associated with the photodiode. The first part includes an output of the amplifier and a first MOS transistor of a differential pair. Each second part includes a second MOS transistor of the differential pair having its gate coupled to the first node associated with the photodiode the second part is associated with; a first switch coupling a source of the second transistor to the first part of the amplifier; and a second switch coupling a drain of the second transistor to the first part of the amplifier.

    Laser Diode Driver Circuits and Methods of Operating Thereof
    7.
    发明申请
    Laser Diode Driver Circuits and Methods of Operating Thereof 有权

    公开(公告)号：US20210234336A1

    公开(公告)日：2021-07-29

    申请号：US16774889

    申请日：2020-01-28

    Applicant: STMicroelectronics (Grenoble 2) SAS

    Inventor： Samuel Rigault ,  Nicolas Moeneclaey ,  Xavier Branca

    IPC: H01S5/042

    Abstract: A driver circuit includes a fly capacitor with a first end and a second end. The driver circuit includes a laser diode having an anode and a cathode. The driver circuit is configured to operate in first and second operating states. The anode is coupled to the first end of the fly capacitor. In the first operating state, the cathode is coupled to a first voltage supply node, the first end of the fly capacitor is coupled to a second voltage supply node, and the second end of the fly capacitor is coupled to a first reference terminal. In the second operating state, the cathode is coupled to a second reference terminal and decoupled from the first voltage supply node, the first end of the fly capacitor is decoupled from the second voltage supply node, and the second end of the fly capacitor is coupled to a third reference terminal.

    Laser diode driver circuits and methods of operating thereof
    9.
    发明授权
    Laser diode driver circuits and methods of operating thereof 有权

    公开(公告)号：US11482836B2

    公开(公告)日：2022-10-25

    申请号：US16774889

    申请日：2020-01-28

    Applicant: STMicroelectronics (Grenoble 2) SAS

    Inventor： Samuel Rigault ,  Nicolas Moeneclaey ,  Xavier Branca

    IPC: H01S5/042 ,  H01S5/068

    Abstract: A driver circuit includes a fly capacitor with a first end and a second end. The driver circuit includes a laser diode having an anode and a cathode. The driver circuit is configured to operate in first and second operating states. The anode is coupled to the first end of the fly capacitor. In the first operating state, the cathode is coupled to a first voltage supply node, the first end of the fly capacitor is coupled to a second voltage supply node, and the second end of the fly capacitor is coupled to a first reference terminal. In the second operating state, the cathode is coupled to a second reference terminal and decoupled from the first voltage supply node, the first end of the fly capacitor is decoupled from the second voltage supply node, and the second end of the fly capacitor is coupled to a third reference terminal.

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