公开(公告)号：US20190199338A1

公开(公告)日：2019-06-27

申请号：US16221855

申请日：2018-12-17

Applicant: STMicroelectronics S.r.l.

Inventor： Marco ZAMPROGNO ,  Alireza TAJFAR

IPC: H03K17/041 ,  H03K17/687 ,  H03M1/06

CPC classification number: H03K17/04106 ,  G03B21/2033 ,  H03K17/08122 ,  H03K17/6871 ,  H03K19/08 ,  H03M1/06 ,  H03M1/66

Abstract: A circuit includes a first transistor and a second transistor having respective control terminals coupled to receive first and second bias voltages. A first electronic switch is coupled in series with, and between current paths of the first and second transistors to provide an output current line between a circuit output node and ground. A second electronic switch is selectively activated to a conductive state in order to provide a charge transfer current path between a bias node and a charge transfer node in the output current line. A third electronic switch is selectively activated to a conductive state in order to provide a charge transfer current path between the charge transfer node and the control terminal of the second transistor.

公开(公告)号：US20200083877A1

公开(公告)日：2020-03-12

申请号：US16680831

申请日：2019-11-12

Applicant: STMicroelectronics S.r.l.

Inventor： Marco ZAMPROGNO ,  Alireza TAJFAR

IPC: H03K17/041 ,  H03M1/06 ,  H03K17/687 ,  H03K19/08 ,  H03K17/0812

Abstract: A circuit includes a first transistor and a second transistor having respective control terminals coupled to receive first and second bias voltages. A first electronic switch is coupled in series with, and between current paths of the first and second transistors to provide an output current line between a circuit output node and ground. A second electronic switch is selectively activated to a conductive state in order to provide a charge transfer current path between a bias node and a charge transfer node in the output current line. A third electronic switch is selectively activated to a conductive state in order to provide a charge transfer current path between the charge transfer node and the control terminal of the second transistor.

公开(公告)号：US20210006034A1

公开(公告)日：2021-01-07

申请号：US17026495

申请日：2020-09-21

Applicant: STMicroelectronics S.r.l. ,  Politecnico Di Milano

Inventor： Marco ZAMPROGNO ,  Alireza TAJFAR

IPC: H01S5/042 ,  H01S5/062 ,  H01S5/068

Abstract: A level-shifter includes an input node coupled to a laser driver input receiving a trigger signal, the input node receiving a signal indicating generation of a laser drive-pulse. A p-channel transistor has a source coupled to a supply node, a drain coupled to an output node, and a gate coupled to the input node. An n-channel transistor has a drain coupled to the drain of the p-channel transistor, a source coupled to ground, and a gate coupled to the input node. A first switch couples the input node to the output node. Another p-channel transistor has a source coupled to the supply node, a drain coupled to the output node by a second switch, and a gate coupled to the input node. The first switch closes and second switch opens when the signal is low, and the first switch opens and second switch closes when the signal is high.

公开(公告)号：US20220329042A1

公开(公告)日：2022-10-13

申请号：US17852100

申请日：2022-06-28

Applicant: STMicroelectronics S.r.l. ,  POLITECNICO DI MILANO

Inventor： Marco ZAMPROGNO ,  Alireza TAJFAR

IPC: H01S5/042 ,  H01S5/062 ,  H01S5/068

Abstract: An input is coupled to a cathode of a laser diode having its anode coupled to a high-voltage-supply, with a cascoded current mirror having an input and output branches. The input branch is coupled between the high-voltage-supply and a sense resistor coupled to the input. The output branch is coupled between the high-voltage-supply and an output. A sense resistance is coupled between the output and ground, and includes a diode-coupled transistor coupled to the output and a resistor coupled between the diode-coupled transistor and ground. The input branch generates a current proportional to a voltage across the laser diode, and the output branch generates a mirrored current proportional to the current proportional to the voltage across the laser diode. A voltage proportional to the voltage across the laser diode is generated by the mirrored current flowing through the sense resistance. A comparison circuit compares this voltage to a threshold.

公开(公告)号：US20220302676A1

公开(公告)日：2022-09-22

申请号：US17833604

申请日：2022-06-06

Applicant: STMicroelectronics S.r.l.

Inventor： Marco ZAMPROGNO ,  Alireza TAJFAR

IPC: H01S5/042 ,  G02B26/08 ,  G02B26/10 ,  H01S5/062 ,  H05B45/30 ,  H05B45/325 ,  H03K5/26

Abstract: A pulsed signal generator generates a pulsed signal having a pulse width configured to be equal to a given fraction of a pulse width of a reference clock. A reference current source outputs current having a reference magnitude, and a comparison current source outputs current having a magnitude that is a function of the reference magnitude and the given fraction. A comparison circuit compares a total current output by one of the reference current source and the comparison current source during pulses of the reference clock to a total current output by the other of the reference current source and the comparison current source during pulses of the pulsed signal equal in number to the pulses of the reference clock in order to determine whether the pulse width of the pulse signal is less than or equal to the given fraction of the pulse width of the reference clock.