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公开(公告)号：US20230384429A1
公开(公告)日：2023-11-30
申请号：US18359477
申请日：2023-07-26
Applicant: STMicroelectronics (Alps) SAS
Inventor： Romain David , Xavier Branca
CPC classification number: G01S7/484 , G01S17/10 , H01S5/0428 , H01S5/062
Abstract: The present disclosure relates to a driver circuit for an optical light emitter of a ranging device, the driver circuit comprising: an inductor having a first of its nodes coupled to a current driver; a first branch comprising a first switch coupled between the second node of the inductor and a first supply voltage rail; a second branch for conducting a current through the optical light emitter, the second branch being coupled between the second node of the inductor and the first supply voltage rail; and a current sensor configured to detect the current passing through the inductor and to provide a feedback signal to the current driver.
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公开(公告)号：US11754684B2
公开(公告)日：2023-09-12
申请号：US16888334
申请日：2020-05-29
Applicant: STMicroelectronics (Alps) SAS
Inventor： Romain David , Xavier Branca
CPC classification number: G01S7/484 , G01S17/10 , H01S5/0428 , H01S5/062
Abstract: The present disclosure relates to a driver circuit for an optical light emitter of a ranging device, the driver circuit comprising: an inductor having a first of its nodes coupled to a current driver; a first branch comprising a first switch coupled between the second node of the inductor and a first supply voltage rail; a second branch for conducting a current through the optical light emitter, the second branch being coupled between the second node of the inductor and the first supply voltage rail; and a current sensor configured to detect the current passing through the inductor and to provide a feedback signal to the current driver.
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Patent Agency Ranking
公开(公告)号：US11988776B2
公开(公告)日：2024-05-21
申请号：US18359477
申请日：2023-07-26
Applicant: STMicroelectronics (Alps) SAS
Inventor： Romain David , Xavier Branca
CPC classification number: G01S7/484 , G01S17/10 , H01S5/0428 , H01S5/062
Abstract: The present disclosure relates to a driver circuit for an optical light emitter of a ranging device, the driver circuit comprising: an inductor having a first of its nodes coupled to a current driver; a first branch comprising a first switch coupled between the second node of the inductor and a first supply voltage rail; a second branch for conducting a current through the optical light emitter, the second branch being coupled between the second node of the inductor and the first supply voltage rail; and a current sensor configured to detect the current passing through the inductor and to provide a feedback signal to the current driver.
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公开(公告)号：US20230361528A1
公开(公告)日：2023-11-09
申请号：US18193190
申请日：2023-03-30
Applicant: STMicroelectronics (Alps) SAS
Inventor： Xavier Branca
CPC classification number: H01S5/062 , H01S5/0014 , H01S5/0617 , G01S7/484 , G01S17/10
Abstract: In according with an embodiment, a method for power supplying a laser diode includes: generating a power supply current injected directly into the laser diode; generating a power supply voltage biasing terminals of the laser diode; measuring a temperature in a vicinity of the laser diode; and controlling the power supply current at an adjusted intensity according to the measured temperature or controlling the power supply voltage at an adjusted level according to the measured temperature.
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公开(公告)号：US20180175586A1
公开(公告)日：2018-06-21
申请号：US15598113
申请日：2017-05-17
Applicant: STMicroelectronics (Alps) SAS
Inventor： Xavier Branca
CPC classification number: H01S5/06216 , G01S7/4815 , G01S7/4911 , G01S17/32 , G01S17/89 , H01S5/0428 , H01S5/062 , H01S5/183 , H01S5/4025 , H01S5/405 , H01S5/42 , H01S5/423
Abstract: An optical emitting circuit includes an array of M optical sources distributed in N groups, where N is lower than M. A controller is configured to generate N periodic square wave control signals that are successively mutually phase shifted by pi/N and that all have the same period, and to cyclically activate/deactivate all the optical sources of the N groups using the control signals. The optical emitting circuit is configured so that each group is activated when a corresponding control signal is in its first state and deactivated when the corresponding control signal is in its second state. The number of optical sources in each group and the order of the groups in the sequence of activations/deactivations are chosen so as to generate an optical signal having an amplitude that sinusoidally varies in steps.
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公开(公告)号：US20170317665A1
公开(公告)日：2017-11-02
申请号：US15363743
申请日：2016-11-29
Applicant: STMicroelectronics (Alps) SAS
Inventor： Xavier Branca
Abstract: An optical emission circuit includes a power supply source and a regulation circuit coupled to control the power supply source. An optical source and a first switch are coupled in series to the power supply source. A square pulse signal source has an output coupled to a control input of the first switch. The square pulse signal source is configured to provide a square pulse signal. The regulation circuit regulates the current supplied by the power supply source according to a product of a peak current set point by a duty cycle of the square pulse signal.
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公开(公告)号：US10003174B1
公开(公告)日：2018-06-19
申请号：US15598113
申请日：2017-05-17
Applicant: STMicroelectronics (Alps) SAS
Inventor： Xavier Branca
Abstract: An optical emitting circuit includes an array of M optical sources distributed in N groups, where N is lower than M. A controller is configured to generate N periodic square wave control signals that are successively mutually phase shifted by pi/N and that all have the same period, and to cyclically activate/deactivate all the optical sources of the N groups using the control signals. The optical emitting circuit is configured so that each group is activated when a corresponding control signal is in its first state and deactivated when the corresponding control signal is in its second state. The number of optical sources in each group and the order of the groups in the sequence of activations/deactivations are chosen so as to generate an optical signal having an amplitude that sinusoidally varies in steps.
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