Patents by Inventor Laurent Gonthier

Laurent Gonthier has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210226553
    Abstract: A capacitive element has its terminals coupled together by two thyristors electrically in antiparallel. The discharge of the capacitive element is controlled by the application of a gate current to one thyristor of the two thyristors which is in a reverse-biased state in response to a voltage stored across the terminals of the capacitive element. The reverse-biased thyristor responds to the applied gate current by passing a leakage current to discharge the stored voltage.
    Type: Application
    Filed: January 13, 2021
    Publication date: July 22, 2021
    Applicant: STMicroelectronics LTD
    Inventor: Laurent GONTHIER
  • Publication number: 20200395866
    Abstract: A rectifying bridge has a thyristor coupled in series with a rectifying element between a first rectified output terminal of a rectifying bridge circuit and a second rectified output terminal of the rectifying bridge circuit. A diode is coupled in series with a DC voltage source between a gate of the thyristor and the second rectified output terminal.
    Type: Application
    Filed: June 10, 2020
    Publication date: December 17, 2020
    Inventors: Laurent GONTHIER, Yu Tsao LIN
  • Publication number: 20200381992
    Abstract: A circuit includes two thyristors coupled in anti-series. An AC capacitor has first and second electrodes respectively coupled to two different electrodes of the two thyristors. The first and second electrodes are coupled to receive an AC voltage. A control circuit detects discontinuance of application of the AC voltage to the AC capacitor and in response thereto simultaneously applies same gate currents to the two thyristors. A current path through the two thyristors (one passing current in forward mode and the other in reverse mode) discharges a residual voltage stored on the AC capacitor.
    Type: Application
    Filed: May 28, 2020
    Publication date: December 3, 2020
    Applicant: STMicroelectronics LTD
    Inventor: Laurent GONTHIER
  • Patent number: 10686388
    Abstract: An AC/DC converter includes a first terminal and a second terminal to receive an AC voltage and a third terminal and a fourth terminal to deliver a DC voltage. A rectifying bridge is provided in the converter. A controllable switching or rectifying element has a control terminal configured to receive a control current. A first switch is coupled between a supply voltage and the control terminal to inject the control current. A second switch is coupled between the control terminal and a reference voltage to extract the control current. The first and second switches are selectively actuated by a control circuit.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: June 16, 2020
    Assignees: STMicroelectronics (Tours) SAS, STMicroelectronics S.r.l.
    Inventors: Laurent Gonthier, Roberto Larosa, Giulio Zoppi
  • Patent number: 10483869
    Abstract: Embodiments are directed to power conversion circuits including a bypass circuit for bypassing an inrush current limiting resistor. In one embodiment, a power conversion circuit is provided that includes a bridge rectifier, a current limiting resistor, a controllable current switching device, and a driver. The current limiting resistor has a first terminal coupled to an output terminal of the bridge rectifier and a second terminal coupled to an electrical ground. The controllable current switching device has conduction terminals coupled in parallel with respect to the current limiting resistor. The driver is coupled between the first terminal of the current limiting resistor and a control terminal of the current switching device, and the driver controls an operation of the current switching device based on a current through the current limiting resistor.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: November 19, 2019
    Assignee: STMICROELECTRONICS LTD
    Inventors: Laurent Gonthier, Kimi Lu, Jack Wang
  • Publication number: 20190222136
    Abstract: An AC/DC converter includes a first terminal and a second terminal to receive an AC voltage and a third terminal and a fourth terminal to deliver a DC voltage. A rectifying bridge is provided in the converter. A controllable switching or rectifying element has a control terminal configured to receive a control current. A first switch is coupled between a supply voltage and the control terminal to inject the control current. A second switch is coupled between the control terminal and a reference voltage to extract the control current. The first and second switches are selectively actuated by a control circuit.
    Type: Application
    Filed: March 25, 2019
    Publication date: July 18, 2019
    Applicants: STMicroelectronics (Tours) SAS, STMicroelectronics S.r.l.
    Inventors: Laurent GONTHIER, Roberto LAROSA, Giulio ZOPPI
  • Patent number: 10298143
    Abstract: A rectifying circuit including: between a first terminal of application of an AC voltage and a first rectified voltage delivery terminal, at least one first diode; and between a second terminal of application of the AC voltage and a second rectified voltage delivery terminal, at least one first anode-gate thyristor, the anode of the first thyristor being connected to the second rectified voltage delivery terminal; and at least one first stage for controlling the first thyristor, including: a first transistor coupling the thyristor gate to a terminal of delivery of a potential which is negative with respect to the potential of the second rectified voltage delivery terminal; and a second transistor connecting a control terminal of the first transistor to a terminal for delivering a potential which is positive with respect to the potential of the second rectified voltage delivery terminal, the anode of the first thyristor being connected to the common potential of voltages defined by said positive and negative p
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: May 21, 2019
    Assignee: STMicroelectronics (Tours) SAS
    Inventors: Ghafour Benabdelaziz, Laurent Gonthier
  • Patent number: 10284107
    Abstract: An AC/DC converter includes a first terminal and a second terminal to receive an AC voltage and a third terminal and a fourth terminal to deliver a DC voltage. A rectifying bridge is provided in the converter. A controllable switching or rectifying element has a control terminal configured to receive a control current. A first switch is coupled between a supply voltage and the control terminal to inject the control current. A second switch is coupled between the control terminal and a reference voltage to extract the control current. The first and second switches are selectively actuated by a control circuit.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: May 7, 2019
    Assignees: STMicroelectronics (Tours) SAS, STMicroelectronics S.r.l.
    Inventors: Laurent Gonthier, Roberto Larosa, Giulio Zoppi
  • Patent number: 10014797
    Abstract: An AC/DC converter includes: a first terminal and a second terminal for receiving an AC voltage and a third terminal and a fourth terminal for supplying a DC voltage. A rectifying bridge includes input terminals respectively coupled to the first terminal and the second terminal, and output terminals respectively coupled to the third terminal and fourth terminal. A first branch of the rectifying bridge includes, connected between the output terminals, two series-connected thyristors with a junction point of the two thyristors being connected to a first one of the input terminals. A second branch of the rectifying bridge is formed by series connected diodes. A control circuit is configured to generate control signals for application to the control gates of the thyristors.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: July 3, 2018
    Assignee: STMicroelectronics (Tours) SAS
    Inventors: Laurent Gonthier, Muriel Nina, Romain Pichon
  • Publication number: 20180152116
    Abstract: A rectifying circuit including: between a first terminal of application of an AC voltage and a first rectified voltage delivery terminal, at least one first diode; and between a second terminal of application of the AC voltage and a second rectified voltage delivery terminal, at least one first anode-gate thyristor, the anode of the first thyristor being connected to the second rectified voltage delivery terminal; and at least one first stage for controlling the first thyristor, including: a first transistor coupling the thyristor gate to a terminal of delivery of a potential which is negative with respect to the potential of the second rectified voltage delivery terminal; and a second transistor connecting a control terminal of the first transistor to a terminal for delivering a potential which is positive with respect to the potential of the second rectified voltage delivery terminal, the anode of the first thyristor being connected to the common potential of voltages defined by said positive and negative p
    Type: Application
    Filed: January 23, 2018
    Publication date: May 31, 2018
    Inventors: Ghafour BENABDELAZIZ, Laurent GONTHIER
  • Patent number: 9979298
    Abstract: A rectifier bridge circuit includes a first SCR/IGBT switch and a second SCR/IGBT switch coupled to a circuit input to receive an ac input voltage. The first and second SCR/IGBT switches are alternatively switchable to generate a rectified voltage at a circuit output. Control currents coupled to control terminals of the first and second SCR/IGBT switches are power supply sourced from an auxiliary dc source generated by rectifying the ac input voltage. The control currents are generated by current sources coupled between the auxiliary dc source and the control terminals of the first and second SCR/IGBT switches. The current sources are selectively activatable to produce gating currents for switching on and off the first and second SCR/IGBT switches. A controller unit is provided to control the current sources via level shifter circuits. The control implements progressive conduction time of the first and second SCR/IGBT switches so as to provide inrush current limitation.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: May 22, 2018
    Assignees: STMicroelectronics S.r.l., STMicroelectronics (Tours) SAS
    Inventors: Roberto Larosa, Giulio Zoppi, Laurent Gonthier
  • Patent number: 9912249
    Abstract: A rectifying circuit including: between a first terminal of application of an AC voltage and a first rectified voltage delivery terminal, at least one first diode; and between a second terminal of application of the AC voltage and a second rectified voltage delivery terminal, at least one first anode-gate thyristor, the anode of the first thyristor being connected to the second rectified voltage delivery terminal; and at least one first stage for controlling the first thyristor, including: a first transistor coupling the thyristor gate to a terminal of delivery of a potential which is negative with respect to the potential of the second rectified voltage delivery terminal; and a second transistor connecting a control terminal of the first transistor to a terminal for delivering a potential which is positive with respect to the potential of the second rectified voltage delivery terminal, the anode of the first thyristor being connected to the common potential of voltages defined by said positive and negative p
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: March 6, 2018
    Assignee: STMICROELECTRONICS (TOURS) SAS
    Inventors: Ghafour Benabdelaziz, Laurent Gonthier
  • Publication number: 20170324350
    Abstract: An AC/DC converter includes: a first terminal and a second terminal for receiving an AC voltage and a third terminal and a fourth terminal for supplying a DC voltage. A rectifying bridge includes input terminals respectively coupled to the first terminal and the second terminal, and output terminals respectively coupled to the third terminal and fourth terminal. A first branch of the rectifying bridge includes, connected between the output terminals, two series-connected thyristors with a junction point of the two thyristors being connected to a first one of the input terminals. A second branch of the rectifying bridge is formed by series connected diodes. A control circuit is configured to generate control signals for application to the control gates of the thyristors.
    Type: Application
    Filed: July 26, 2017
    Publication date: November 9, 2017
    Applicant: STMicroelectronics (Tours) SAS
    Inventors: Laurent Gonthier, Muriel Nina, Romain Pichon
  • Patent number: 9774243
    Abstract: An AC/DC converter receives an AC voltage at a first terminal and a second terminal. A rectifying bridge has a first input terminal coupled via a resistive element to the first terminal and a second input terminal connected to the second terminal, with output terminals of the rectifying bridge coupled to third and fourth terminals of the converter for generating a DC voltage. A first controllable rectifying thyristor couples the first terminal to the third terminal and a second controllable rectifying thyristor couples the fourth terminal to the first terminal. The resistive element functions as an inrush protection device during a first phase when the thyristors are turned off. In a second phase, the thyristors are selectively actuated.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: September 26, 2017
    Assignee: STMicroelectronics (Tours) SAS
    Inventors: Laurent Gonthier, Muriel Nina
  • Patent number: 9755541
    Abstract: An AC/DC converter includes: a first terminal and a second terminal for receiving an AC voltage and a third terminal and a fourth terminal for supplying a DC voltage. A rectifying bridge includes input terminals respectively coupled to the first terminal and the second terminal, and output terminals respectively coupled to the third terminal and fourth terminal. A first branch of the rectifying bridge includes, connected between the output terminals, two series-connected thyristors with a junction point of the two thyristors being connected to a first one of the input terminals. A second branch of the rectifying bridge is formed by series connected diodes. A control circuit is configured to generate control signals for application to the control gates of the thyristors.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: September 5, 2017
    Assignee: STMicroelectronics (Tours) SAS
    Inventors: Laurent Gonthier, Muriel Nina, Romain Pichon
  • Publication number: 20170170746
    Abstract: A rectifying circuit including: between a first terminal of application of an AC voltage and a first rectified voltage delivery terminal, at least one first diode; and between a second terminal of application of the AC voltage and a second rectified voltage delivery terminal, at least one first anode-gate thyristor, the anode of the first thyristor being connected to the second rectified voltage delivery terminal; and at least one first stage for controlling the first thyristor, including: a first transistor coupling the thyristor gate to a terminal of delivery of a potential which is negative with respect to the potential of the second rectified voltage delivery terminal; and a second transistor connecting a control terminal of the first transistor to a terminal for delivering a potential which is positive with respect to the potential of the second rectified voltage delivery terminal, the anode of the first thyristor being connected to the common potential of voltages defined by said positive and negative p
    Type: Application
    Filed: April 27, 2016
    Publication date: June 15, 2017
    Inventors: Ghafour Benabdelaziz, Laurent Gonthier
  • Patent number: 9667130
    Abstract: An AC/DC converter includes a first terminal and a second terminal for receiving an AC voltage and a third terminal and a fourth terminal for delivering a DC voltage. A capacitive circuit is connected between the third and fourth terminals. A rectifying bridge circuit has input terminals respectively coupled to the first and second terminals and has output terminal respectively connected to the third and fourth terminals. An inductive element is coupled in series with a first switch circuit between the first terminal and an input terminal of the rectifying bridge circuit.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: May 30, 2017
    Assignees: STMicroelectronics (Tours) SAS, STMicroelectronics, Inc.
    Inventors: Laurent Gonthier, Muriel Nina, Jurgis Astrauskas
  • Publication number: 20170110970
    Abstract: A rectifier bridge circuit includes a first SCR/IGBT switch and a second SCR/IGBT switch coupled to a circuit input to receive an ac input voltage. The first and second SCR/IGBT switches are alternatively switchable to generate a rectified voltage at a circuit output. Control currents coupled to control terminals of the first and second SCR/IGBT switches are power supply sourced from an auxiliary dc source generated by rectifying the ac input voltage. The control currents are generated by current sources coupled between the auxiliary dc source and the control terminals of the first and second SCR/IGBT switches. The current sources are selectively activatable to produce gating currents for switching on and off the first and second SCR/IGBT switches. A controller unit is provided to control the current sources via level shifter circuits. The control implements progressive conduction time of the first and second SCR/IGBT switches so as to provide inrush current limitation.
    Type: Application
    Filed: May 18, 2016
    Publication date: April 20, 2017
    Applicants: STMicroelectronics S.r.l., STMicroelectronics (Tours) SAS
    Inventors: Roberto Larosa, Giulio Zoppi, Laurent Gonthier
  • Publication number: 20160373021
    Abstract: An AC/DC converter includes a first terminal and a second terminal for receiving an AC voltage and a third terminal and a fourth terminal for delivering a DC voltage. Two transistor switches are series-connected between the third and fourth terminals, with their junction point connected to the first terminal. Two controllable rectifying elements are series-connected between the third and fourth terminals, with their junction point connected to the first terminal or to the second terminal. The two controllable rectifying elements are phase-angle controlled.
    Type: Application
    Filed: December 10, 2015
    Publication date: December 22, 2016
    Applicant: STMicroelectronics (Tours) SAS
    Inventor: Laurent Gonthier
  • Patent number: 9525361
    Abstract: A rectifying circuit includes a first diode coupled between a first terminal configured to receive application of an A.C. voltage and a first terminal configured to deliver a rectified voltage; and an anode-gate thyristor coupled between a second terminal configured to receive application of the A.C. voltage and a second terminal configured to deliver the rectified voltage, wherein an anode of the anode-gate thyristor is connected to the second terminal configured to deliver the rectified voltage.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: December 20, 2016
    Assignee: STMICROELECTRONICS (TOURS) SAS
    Inventor: Laurent Gonthier