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).
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Patent number: 8994283Abstract: A circuit capable of receiving, in series with at least one light-emitting diode, a rectified A.C. voltage, comprising: a first gate turn-off thyristor connected to first and second terminals of the circuit; and a control circuit for turning off the first thyristor when the voltage between the first and second terminals exceeds a threshold.Type: GrantFiled: September 20, 2013Date of Patent: March 31, 2015Assignee: STMicroelectronics (Tours) SASInventors: Laurent Gonthier, Antoine Passal
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Patent number: 8988908Abstract: A capacitive power supply including: a first capacitive element and a first resistive element in series between a first terminal of a power switch and at least one rectifying element having a second terminal connected to a first electrode of at least one second capacitive element for providing a D.C. voltage; and a bidirectional switch in parallel on the resistor.Type: GrantFiled: December 15, 2011Date of Patent: March 24, 2015Assignee: STMicroelectronics (Tours) SASInventors: Laurent Gonthier, Antoine Passal
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Patent number: 8982594Abstract: A circuit for controlling a switch in series with a capacitive element. A circuit may include a bidirectional switch and a diode in parallel with first and second conduction terminals of the switch. The switch may be configured to control a capacitive element adapted to be coupled to an A.C. voltage. The switch includes first and second conduction terminals configured to conduct a same current when the switch is activated.Type: GrantFiled: December 21, 2011Date of Patent: March 17, 2015Assignee: STMicroelectronics (Tours) SASInventors: Antoine Passal, Laurent Gonthier
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Publication number: 20150023078Abstract: A control circuit varies the power of a load powered by an alternating voltage, comprising: a first thyristor and a first diode connected in antiparallel between first and second nodes, the cathode of the first diode being on the side of the first node; a second thyristor and a second diode connected in antiparallel between the second node and a third node, the cathode of the second diode being on the side of the third node; third and fourth diodes connected in antiseries between the first and third nodes, the cathodes of the third and fourth diodes being connected to a fourth node; a transistor between the second and fourth nodes; and a control unit for controlling the first and second thyristors and the transistor.Type: ApplicationFiled: November 6, 2012Publication date: January 22, 2015Inventors: Benoit Renard, Laurent Gonthier
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Publication number: 20140062422Abstract: A circuit can be used for charging a capacitor with an AC voltage. In one embodiment, the circuit includes a capacitor coupled to be charged with the AC voltage. An adjustment is configured to adjust a capacitor charge speed according to a value of the AC voltage. The adjustment circuit includes at least one bipolar transistor coupled to receive a voltage at a base of the bipolar transistor. The voltage is a function of the value of the AC voltage.Type: ApplicationFiled: August 29, 2013Publication date: March 6, 2014Inventors: Laurent Gonthier, Antoine Passal
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Publication number: 20140021872Abstract: A circuit capable of receiving, in series with at least one light-emitting diode, a rectified A.C. voltage, comprising: a first gate turn-off thyristor connected to first and second terminals of the circuit; and a control circuit for turning off the first thyristor when the voltage between the first and second terminals exceeds a threshold.Type: ApplicationFiled: September 20, 2013Publication date: January 23, 2014Applicant: STMicroelectronics (Tours) SASInventors: Laurent Gonthier, Antoine Passal
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Patent number: 8564209Abstract: A circuit capable of receiving, in series with at least one light-emitting diode, a rectified A.C. voltage, comprising: a first gate turn-off thyristor connected to first and second terminals of the circuit; and a control circuit for turning off the first thyristor when the voltage between the first and second terminals exceeds a threshold.Type: GrantFiled: June 10, 2010Date of Patent: October 22, 2013Assignee: STMicroelectronics (Tours) SASInventors: Laurent Gonthier, Antoine Passal
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Publication number: 20120163053Abstract: A circuit including a switch controlling a capacitive element intended to receive an A.C. voltage, and a diode in parallel with the switch.Type: ApplicationFiled: December 21, 2011Publication date: June 28, 2012Applicant: STMicroelectronics (Tours) SASInventors: Antoine Passal, Laurent Gonthier
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Publication number: 20120163050Abstract: A circuit for converting an A.C. power supply voltage into a D.C. voltage, including: a first branch capable of providing a first power level; and a second parallel branch capable of providing a second power level greater than the first one, the second branch including a bidirectional activation switch.Type: ApplicationFiled: December 21, 2011Publication date: June 28, 2012Applicant: STMicroelectronics (Tours) SASInventors: Laurent Gonthier, Antoine Passal
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Publication number: 20120155138Abstract: A capacitive power supply including: a first capacitive element and a first resistive element in series between a first terminal of a power switch and at least one rectifying element having a second terminal connected to a first electrode of at least one second capacitive element for providing a D.C. voltage; and a bidirectional switch in parallel on the resistor.Type: ApplicationFiled: December 15, 2011Publication date: June 21, 2012Applicant: STMicroelectronics (Tours) SASInventors: Laurent GONTHIER, Antoine PASSAL
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Publication number: 20120087052Abstract: A method comprising: a) during at least part of a conduction phase of the triac, measuring the gate potential of the triac; and b) comparing a value based on said measurement with a reference threshold and deducing the presence or the absence of an overcurrent based on said comparison.Type: ApplicationFiled: September 23, 2011Publication date: April 12, 2012Applicants: STMicroelectronics Design & Application sro, STMicroelectronics (Tours) SASInventors: Jan Dreser, Laurent Gonthier
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Patent number: 8004231Abstract: A method and a circuit for controlling a triac intended to be series-connected with a resistive element of positive temperature coefficient or a capacitive element, and a winding for starting an asynchronous motor, for supply by an A.C. voltage, the present invention including the steps of: detecting a voltage representative of the voltage across the series connection of the element and of the triac; comparing this detected voltage with respect to a threshold; and blocking a turning back on of the triac when the threshold has been exceeded.Type: GrantFiled: February 24, 2009Date of Patent: August 23, 2011Assignee: STMicroelectronics S.A.Inventors: Laurent Gonthier, Jean-Michel Simonnet
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Publication number: 20110006721Abstract: The invention relates to a device for controlling the speed and the rotation direction of an asynchronous motor (1), comprising a first circuit (7) with two bi-directional switches (T?4, T?5) individually controlled and having first conducting terminals connected to a common terminal (6) for applying a direct potential (Vcc) and having second conducting terminals that can be respectively connected to the first ends (12, 14) of windings (15, 16) of the motor stator, and a second circuit (3?) with at least two parallel bi-directional switches (T1, T2, T3) individually controlled and having first respective conducting terminals (Ki) connected to the common terminal.Type: ApplicationFiled: January 4, 2008Publication date: January 13, 2011Applicant: STMicroelectronics S.A.Inventors: Laurent Gonthier, Raynald Achart
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Publication number: 20100315006Abstract: A circuit capable of receiving, in series with at least one light-emitting diode, a rectified A.C. voltage, comprising: a first gate turn-off thyristor connected to first and second terminals of the circuit; and a control circuit for turning off the first thyristor when the voltage between the first and second terminals exceeds a threshold.Type: ApplicationFiled: June 10, 2010Publication date: December 16, 2010Applicant: STMicroelectronics (Tours) SASInventors: Laurent Gonthier, Antoine Passal
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Publication number: 20090174359Abstract: A method and a circuit for controlling a triac intended to be series-connected with a resistive element of positive temperature coefficient or a capacitive element, and a winding for starting an asynchronous motor, for supply by an A.C. voltage, the present invention including the steps of: detecting a voltage representative of the voltage across the series connection of the element and of the triac; comparing this detected voltage with respect to a threshold; and blocking a turning back on of the triac when the threshold has been exceeded.Type: ApplicationFiled: February 24, 2009Publication date: July 9, 2009Applicant: STMcroelectronics S.A.Inventors: Laurent Gonthier, Jean-Michel Simonnet
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Patent number: 7514897Abstract: A method and a circuit for controlling a triac intended to be series-connected with a resistive element of positive temperature coefficient or which is at least capacitive, and a winding for starting an asynchronous motor, for supply by an A.C. voltage, the present invention including the steps of: detecting a voltage representative of the voltage across the series connection of the element and of the triac; comparing this detected voltage with respect to a threshold; and blocking a turning back on of the triac when the threshold has been exceeded.Type: GrantFiled: November 21, 2006Date of Patent: April 7, 2009Assignee: STMicroelectronics S.A.Inventor: Laurent Gonthier
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Patent number: 7483280Abstract: A capacitive power supply circuit, comprising a power storage element between two output terminals for providing a rectified output voltage; in series between a first input terminal for applying an A.C. voltage and a first of the output terminals, at least one capacitor and a first diode; a switch controllable by application of a signal on a triggering terminal; and means for controlling said switch to the on state when the output voltage is in a predetermined range of values.Type: GrantFiled: August 11, 2005Date of Patent: January 27, 2009Assignee: STMicroelectronics SAInventors: Ghafour Benabdelaziz, Laurent Gonthier
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Patent number: 7479744Abstract: A circuit for controlling the power in a load supplied by an A.C. voltage and directly connected to a first terminal of application of the A.C. voltage, including two isolated-gate bipolar transistors, connected in anti-parallel between a second terminal of application of the A.C. voltage and the load; circuitry for detecting the zero crossing of the A.C. supply voltage in a first direction; circuitry for generating, at each period of the supply voltage, a pulse of predetermined duration for controlling a first one of said transistors, the time of occurrence of the pulse being conditioned by the detection of the zero crossing of the A.C. voltage and by a desired power reference setting a variable delay of occurrence of the pulse with respect to the detected zero crossing; and circuitry for inverting and transferring said pulse to the second transistor.Type: GrantFiled: November 28, 2007Date of Patent: January 20, 2009Assignee: STMicroelectronics S.A.Inventors: Raynald Achart, Laurent Gonthier
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Publication number: 20080157747Abstract: A circuit for controlling the power in a load supplied by an A.C. voltage and directly connected to a first terminal of application of the A.C. voltage, including two isolated-gate bipolar transistors, connected in anti-parallel between a second terminal of application of the A.C. voltage and the load; circuitry for detecting the zero crossing of the A.C. supply voltage in a first direction; circuitry for generating, at each period of the supply voltage, a pulse of predetermined duration for controlling a first one of said transistors, the time of occurrence of the pulse being conditioned by the detection of the zero crossing of the A.C. voltage and by a desired power reference setting a variable delay of occurrence of the pulse with respect to the detected zero crossing; and circuitry for inverting and transferring said pulse to the second transistor.Type: ApplicationFiled: November 28, 2007Publication date: July 3, 2008Applicant: STMicroelectronics S.A.Inventors: Raynald Achart, Laurent Gonthier
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Publication number: 20070216375Abstract: A circuit for controlling the power in a load supplied by an A.C. voltage and directly connected to a first terminal of application of the A.C. voltage, including two isolated-gate bipolar transistors, connected in anti-parallel between a second terminal of application of the A.C. voltage and the load; circuitry for detecting the zero crossing of the A.C. supply voltage in a first direction; circuitry for generating, at each period of the supply voltage, a pulse of predetermined duration for controlling a first one of said transistors, the time of occurrence of the pulse being conditioned by the detection of the zero crossing of the A.C. voltage and by a desired power reference setting a variable delay of occurrence of the pulse with respect to the detected zero crossing; and circuitry for inverting and transferring said pulse to the second transistor.Type: ApplicationFiled: January 19, 2007Publication date: September 20, 2007Applicant: STMicroelectronics S.A.Inventors: Raynald Achart, Laurent Gonthier