Patents by Inventor Cécile Hamon

Cécile Hamon 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).

  • Voltage regulator with enhanced stability
    Patent number: 6946821
    Abstract: A voltage regulator having an output terminal adapted to being connected to a load, including an operational amplifier having its non-inverting input connected to a reference voltage, and its inverting input connected to the output terminal, an inverting amplifier having its input connected to the output of the operational amplifier, a capacitive impedance connected between the input and the output of the inverting amplifier, a power switch controlled by the output of the inverter amplifier, arranged to connect the output terminal to a first supply voltage, said capacitive impedance including a short-circuitable portion associated with active short-circuit means when the current flowing through the load is greater than a predetermined current.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: September 20, 2005
    Assignee: STMicroelectronics S.A.
    Inventors: Cécile Hamon, Christophe Bernard, Alexandre Pons
  • Voltage regulator with reduced open-loop static gain
    Patent number: 6933708
    Abstract: A voltage regulator having an output terminal adapted to being connected to a load, including an operational amplifier having its non-inverting input connected to a first reference voltage, and its inverting input connected to the output terminal, an inverting stage having its input connected to the output of the operational amplifier, a power switch controlled by the output of the inverter stage, arranged between the output terminal and a supply voltage, and a charge capacitor arranged between the output terminal and a reference supply voltage, including a means for reducing the effective output impedance of the operational amplifier.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: August 23, 2005
    Assignee: STMicroelectronics S.A.
    Inventors: Cécile Hamon, Christophe Bernard, Alexandre Pons
  • Voltage regulator protected against short-circuits by current limiter responsive to output voltage
    Patent number: 6804102
    Abstract: A voltage regulator having an output terminal adapted to being connected to a load, including a device for limiting the current flowing through the load to a first threshold current if the voltage of the output terminal is lower than a threshold voltage, and to a second current threshold higher than the first current threshold if the voltage of the output terminal is greater than the threshold voltage.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: October 12, 2004
    Assignee: STMicroelectronics S.A.
    Inventors: Cécile Hamon, Christophe Bernard, Alexandre Pons
  • Voltage regulator with static gain in reduced open loop
    Publication number: 20040061485
    Abstract: A voltage regulator having an output terminal adapted to being connected to a load, including an operational amplifier having its non-inverting input connected to a first reference voltage, and its inverting input connected to the output terminal, an inverting stage having its input connected to the output of the operational amplifier, a power switch controlled by the output of the inverter stage, arranged between the output terminal and a supply voltage, and a charge capacitor arranged between the output terminal and a reference supply voltage, including a means for reducing the effective output impedance of the operational amplifier.
    Type: Application
    Filed: June 23, 2003
    Publication date: April 1, 2004
    Inventors: Cecile Hamon, Christophe Bernard, Alexandre Pons
  • Voltage regulator with enhanced stability
    Publication number: 20040051508
    Abstract: A voltage regulator having an output terminal adapted to being connected to a load, including an operational amplifier having its non-inverting input connected to a reference voltage, and its inverting input connected to the output terminal, an inverting amplifier having its input connected to the output of the operational amplifier, a capacitive impedance connected between the input and the output of the inverting amplifier, a power switch controlled by the output of the inverter amplifier, arranged to connect the output terminal to a first supply voltage, said capacitive impedance including a short-circuitable portion associated with active short-circuit means when the current flowing through the load is greater than a predetermined current.
    Type: Application
    Filed: June 30, 2003
    Publication date: March 18, 2004
    Inventors: Cecile Hamon, Bernard Christophe, Pons Alexandre
  • Voltage regulator with an improved efficiency
    Patent number: 6677737
    Abstract: A voltage regulator having an output terminal provided for being connected to a load, including an amplifier having its inverting input connected to a reference voltage, and its non-inverting input connected to the output terminal, a charge capacitor arranged between the output terminal and a first supply voltage, first and second voltage-controlled switches each arranged to connect a second supply voltage and the output terminal, and a control means adapted to providing a voltage depending on the output voltage of the amplifier, on the one hand, to the gate of the first switch and, on the other hand, when the current flowing through the first switch reaches a predetermined threshold, to the gate of the second switch.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: January 13, 2004
    Assignee: STMicroelectronics S.A.
    Inventors: Cécile Hamon, Christophe Bernard, Alexandre Pons
  • Voltage regulator protected against short -circuits
    Publication number: 20030147193
    Abstract: A voltage regulator having an output terminal adapted to being connected to a load, including a device for limiting the current flowing through the load to a first threshold current if the voltage of the output terminal is lower than a threshold voltage, and to a second current threshold higher than the first current threshold if the voltage of the output terminal is greater than the threshold voltage.
    Type: Application
    Filed: January 21, 2003
    Publication date: August 7, 2003
    Inventors: Cecile Hamon, Christophe Bernard, Alexandre Pons
  • Voltage regulator with an improved efficiency
    Publication number: 20020125866
    Abstract: A voltage regulator having an output terminal provided for being connected to a load, including an amplifier having its inverting input connected to a reference voltage, and its non-inverting input connected to the output terminal, a charge capacitor arranged between the output terminal and a first supply voltage, first and second voltage-controlled switches each arranged to connect a second supply voltage and the output terminal, and a control means adapted to providing a voltage depending on the output voltage of the amplifier, on the one hand, to the gate of the first switch and, on the other hand, when the current flowing through the first switch reaches a predetermined threshold, to the gate of the second switch.
    Type: Application
    Filed: January 16, 2002
    Publication date: September 12, 2002
    Applicant: STMicroelectronics, S.A.
    Inventors: Cecile Hamon, Christophe Bernard, Alexandre Pons