Patents by Inventor Christophe Forel

Christophe Forel 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).

  • Patent number: 10832780
    Abstract: A method can be used for programming a group of memory cells of a non-volatile memory device in a programming window that has a duration longer than a programming duration of a memory cell. The programming window is subdivided into a number of time intervals. A programming profile that was determined by simulation while taking into account a reference criterion is retrieved. The programming profile includes, for each time interval, a maximum number of memory cells that can be triggered for programming within each time interval. The memory device is programmed in the programming window, interval-wise, using the programming profile.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: November 10, 2020
    Assignees: STMICROELECTRONICS (ALPS) SAS, STMICROELECTRONICS (GRENOBLE2) SAS
    Inventors: Leonardo Valencia Rissetto, Elise Le Roux, Christophe Forel
  • Publication number: 20200005872
    Abstract: A method can be used for programming a group of memory cells of a non-volatile memory device in a programming window that has a duration longer than a programming duration of a memory cell. The programming window is subdivided into a number of time intervals. A programming profile that was determined by simulation while taking into account a reference criterion is retrieved. The programming profile includes, for each time interval, a maximum number of memory cells that can be triggered for programming within each time interval. The memory device is programmed in the programming window, interval-wise, using the programming profile.
    Type: Application
    Filed: June 5, 2019
    Publication date: January 2, 2020
    Inventors: Leonardo Valencia Rissetto, Elise Le Roux, Christophe Forel
  • Patent number: 9640114
    Abstract: A device includes a matrix of active pixels. Each active pixel includes an OLED and a control circuit configured to refresh the active pixel and including at least one transistor having a first conduction terminal coupled to a supply line and a second conduction terminal coupled to the OLED. Supply circuitry is configured to apply a supply voltage to the supply line of each active pixel during the refreshing of the active pixel and for a time period less than a duration of the refreshing of the active pixel.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: May 2, 2017
    Assignee: STMicroelectronics International N.V.
    Inventors: Jerome Nebon, Christophe Forel
  • Patent number: 9521723
    Abstract: An integrated device includes a semiconducting substrate having a matrix of active pixels formed therein. Each active pixel includes an OLED diode, a first nMOS transistor having its source coupled to an anode of the OLED diode, and a refresh circuit coupled to a gate of the first nMOS transistor. The first nMOS transistor has its source and its substrate coupled together. The first nMOS transistor is situated in and on a first part of the semiconductor substrate, and the refresh circuit is situated in and on a second part of the semiconductor substrate, with the first part and the second part being electrically insulated from one another.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: December 13, 2016
    Assignee: STMicroelectronics International N.V.
    Inventors: Jerome Nebon, Christophe Forel
  • Publication number: 20150371588
    Abstract: A device includes a matrix of active pixels. Each active pixel includes an OLED and a control circuit configured to refresh the active pixel and including at least one transistor having a first conduction terminal coupled to a supply line and a second conduction terminal coupled to the OLED. Supply circuitry is configured to apply a supply voltage to the supply line of each active pixel during the refreshing of the active pixel and for a time period less than a duration of the refreshing of the active pixel.
    Type: Application
    Filed: May 29, 2015
    Publication date: December 24, 2015
    Applicant: STMicroelectronics International N.V.
    Inventors: Jerome Nebon, Christophe Forel
  • Publication number: 20150366026
    Abstract: An integrated device includes a semiconducting substrate having a matrix of active pixels formed therein. Each active pixel includes an OLED diode, a first nMOS transistor having its source coupled to an anode of the OLED diode, and a refresh circuit coupled to a gate of the first nMOS transistor. The first nMOS transistor has its source and its substrate coupled together. The first nMOS transistor is situated in and on a first part of the semiconductor substrate, and the refresh circuit is situated in and on a second part of the semiconductor substrate, with the first part and the second part being electrically insulated from one another.
    Type: Application
    Filed: May 28, 2015
    Publication date: December 17, 2015
    Applicant: STMicroelectronics International N.V.
    Inventors: Jerome Nebon, Christophe Forel
  • Patent number: 8648642
    Abstract: A switch for an analog signal may include a main MOS transistor whose source forms an input terminal of the switch and whose drain forms an output terminal of the switch, a capacitor having a first terminal permanently connected to the source of the main transistor, a circuit for charging the capacitor, and a first auxiliary transistor configured to connect the second terminal of the capacitor to the gate of the main transistor in response to a control signal. The charge circuit may include a resistor permanently connecting the second terminal of the capacitor to a power supply line. The capacitor and the resistor may form a high-pass filter having a cutoff frequency lower than the frequency of the analog signal.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: February 11, 2014
    Assignee: STMicroelectronics (Grenoble 2) SAS
    Inventors: Hugo Gicquel, Beatrice Lafiandra, Christophe Forel
  • Patent number: 8624674
    Abstract: An output stage of an integrated class-A amplifier in a technology adapted to a first voltage and intended to be powered by a second voltage greater than the first one, including: one or several transistors of a first channel type between a first terminal of application of the second voltage and an output terminal of the stage; transistors of a second channel type between this output terminal and a second terminal of application of the second voltage, wherein: a first transistor of the second channel type has its gate directly connected to an input terminal of the stage; at least a second and a third transistors of the second channel type are in series between the output terminal and said first transistor, the gate of the second transistor being connected to the midpoint of a resistive dividing bridge between said output terminal and the gate of the third transistor, and the gate of the third transistor being biased to a fixed voltage.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: January 7, 2014
    Assignee: STMicroelectronics (Grenoble 2) SAS
    Inventors: Christophe Forel, Roland Mazet
  • Patent number: 8493150
    Abstract: An output stage of a class-AB amplifier, including: a first transistor of a first channel type between a first terminal of application of a first voltage and an output terminal of the stage, having its gate connected to a first input terminal of the stage; a first transistor of a second channel type between this output terminal and a second terminal of application of the first voltage, having its gate connected to a second input terminal of the stage; and second and third transistors of the second channel type between the output terminal and the first transistor of the second channel type, the gate of the second transistor being connected to the midpoint of a resistive dividing bridge between said output terminal and the gate of the third transistor of the second channel type, and the gate of the third transistor being biased to a fixed voltage.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: July 23, 2013
    Assignee: STMicroelectronics (Grenoble 2) SAS
    Inventors: Roland Mazet, Christophe Forel
  • Publication number: 20130043938
    Abstract: A switch for an analog signal may include a main MOS transistor whose source forms an input terminal of the switch and whose drain forms an output terminal of the switch, a capacitor having a first terminal permanently connected to the source of the main transistor, a circuit for charging the capacitor, and a first auxiliary transistor configured to connect the second terminal of the capacitor to the gate of the main transistor in response to a control signal. The charge circuit may include a resistor permanently connecting the second terminal of the capacitor to a power supply line. The capacitor and the resistor may form a high-pass filter having a cutoff frequency lower than the frequency of the analog signal.
    Type: Application
    Filed: August 16, 2012
    Publication date: February 21, 2013
    Applicant: STMICROELECTRONICS (GRENOBLE 2) SAS
    Inventors: Hugo GICQUEL, Beatrice LAFIANDRA, Christophe FOREL
  • Publication number: 20120092071
    Abstract: An output stage of a class-AB amplifier, including: a first transistor of a first channel type between a first terminal of application of a first voltage and an output terminal of the stage, having its gate connected to a first input terminal of the stage; a first transistor of a second channel type between this output terminal and a second terminal of application of the first voltage, having its gate connected to a second input terminal of the stage; and second and third transistors of the second channel type between the output terminal and the first transistor of the second channel type, the gate of the second transistor being connected to the midpoint of a resistive dividing bridge between said output terminal and the gate of the third transistor of the second channel type, and the gate of the third transistor being biased to a fixed voltage.
    Type: Application
    Filed: October 17, 2011
    Publication date: April 19, 2012
    Applicant: STMicroelectronics (Grenoble 2) SAS
    Inventors: Roland Mazet, Christophe Forel
  • Publication number: 20110063033
    Abstract: An output stage of an integrated class-A amplifier in a technology adapted to a first voltage and intended to be powered by a second voltage greater than the first one, including: one or several transistors of a first channel type between a first terminal of application of the second voltage and an output terminal of the stage; transistors of a second channel type between this output terminal and a second terminal of application of the second voltage, wherein: a first transistor of the second channel type has its gate directly connected to an input terminal of the stage; at least a second and a third transistors of the second channel type are in series between the output terminal and said first transistor, the gate of the second transistor being connected to the midpoint of a resistive dividing bridge between said output terminal and the gate of the third transistor, and the gate of the third transistor being biased to a fixed voltage.
    Type: Application
    Filed: September 9, 2010
    Publication date: March 17, 2011
    Applicant: STMicroelectronics (Grenoble) SAS
    Inventors: Christophe Forel, Roland Mazet
  • Patent number: 7420397
    Abstract: An inhibit circuit which produces an inhibit signal when a variation in a power supply potential is detected includes a comparator having a negative input connected to a generator producing a reference potential and a positive input connected to an output of a first image circuit producing a first potential that is an image of the power supply potential. The first image circuit includes a diode and a circuit for the production of a reference current parallel-connected between a common point to which the power supply potential is applied and an output of the first image circuit connected to the positive input of the comparator. The circuit has particular utility in portable integrated circuits with very low consumption when idle such as in mobile telephony.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: September 2, 2008
    Assignee: STMicroelectronics SA
    Inventors: Christophe Forel, Robert Cittadini
  • Patent number: 7053704
    Abstract: A power amplifier circuit including first and second cascade-assembled operational amplifiers having respective first inputs receiving a reference voltage across a decoupling capacitor, respective outputs of which are connected across a load and are looped back on respective second inputs, the second input of the first amplifier receiving, from a coupling capacitor, an input voltage to be amplified, the amplifier circuit including means for separately charging the coupling and decoupling capacitors, upon circuit power-on, from an off or standby state, and means for inhibiting the amplifiers at least during the separate charging.
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: May 30, 2006
    Assignee: STMicroelectronics S.A.
    Inventors: Christophe Forel, Robert Cittadini
  • Publication number: 20050280451
    Abstract: An inhibit circuit which produces an inhibit signal when a variation in a power supply potential is detected includes a comparator having a negative input connected to a generator producing a reference potential and a positive input connected to an output of a first image circuit producing a first potential that is an image of the power supply potential. The first image circuit includes a diode and a circuit for the production of a reference current parallel-connected between a common point to which the power supply potential is applied and an output of the first image circuit connected to the positive input of the comparator. The circuit has particular utility in portable integrated circuits with very low consumption when idle such as in mobile telephony.
    Type: Application
    Filed: June 1, 2005
    Publication date: December 22, 2005
    Inventors: Christophe Forel, Robert Cittadini
  • Publication number: 20040212427
    Abstract: A power amplifier circuit including first and second cascade-assembled operational amplifiers having respective first inputs receiving a reference voltage across a decoupling capacitor, respective outputs of which are connected across a load and are looped back on respective second inputs, the second input of the first amplifier receiving, from a coupling capacitor, an input voltage to be amplified, the amplifier circuit including means for separately charging the coupling and decoupling capacitors, upon circuit power-on, from an off or standby state, and means for inhibiting the amplifiers at least during the separate charging.
    Type: Application
    Filed: April 1, 2004
    Publication date: October 28, 2004
    Inventors: Christophe Forel, Robert Cittadini
  • Patent number: 6765437
    Abstract: An amplifying circuit receiving an input voltage and a reference voltage equal to a fraction of the circuit supply voltage, the reference voltage provided by a time constant circuit, including a circuit for, upon power-on, inhibiting the amplifying circuit for as long as the difference between the value of the provided reference voltage and the voltage at the output of the time constant circuit is greater than a determined threshold.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: July 20, 2004
    Assignee: STMicroelectronics S.A.
    Inventors: Frédéric Goutti, Christophe Forel
  • Publication number: 20030067350
    Abstract: An amplifying circuit receiving an input voltage and a reference voltage equal to a fraction of the circuit supply voltage, the reference voltage provided by a time constant circuit, including a circuit for, upon power-on, inhibiting the amplifying circuit for as long as the difference between the value of the provided reference voltage and the voltage at the output of the time constant circuit is greater than a determined threshold.
    Type: Application
    Filed: October 4, 2002
    Publication date: April 10, 2003
    Applicant: STMicroelectronics S.A.
    Inventors: Frederic Goutti, Christophe Forel
  • Patent number: 6410398
    Abstract: A process for forming an electrical resistance in an integrated MOS transistor includes applying a first voltage to the source and gate of the MOS transistor, and applying a second voltage to the drain of the MOS transistor. A prebiasing voltage is applied to the substrate of the MOS transistor to make the base/emitter junction of a parasitic bipolar transistor of the MOS transistor conduct. The first and second voltages are capable of initiating a breakdown of the MOS transistor by an avalanche of the drain/substrate junction, an irreversible breakdown of the drain/substrate junction, and a short circuit between the drain and the source.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: June 25, 2002
    Assignee: STMicroelectronics S.A.
    Inventors: Christophe Forel, Sebastien Laville, Serge Pontarollo
  • Patent number: 6377115
    Abstract: A process and an integrated circuit are intended for obtaining an adjustable electrical resistance, in which a first voltage is applied to an integrated MOS transistor on its source, its gate and its substrate, and a second voltage is applied on its drain, the first and second voltages being able to initiate a breakdown of the MOS transistor by: avalanche of the drain/substrate junction; biasing of the parasitic bipolar transistor of the MOS transistor; irreversible breakdown of the drain/substrate junction; and shorting between the drain and the source.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: April 23, 2002
    Assignee: STMicroelectronics S.A.
    Inventors: Christophe Forel, Sebastien Laville, Christian Dufaza, Daniel Auvergne