Patents by Inventor Laurent Dugoujon

Laurent Dugoujon 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).

  • Circuit for data transmission in asynchronous mode with a free reception frequency locked on the transmission frequency
    Patent number: 5805650
    Abstract: A circuit for transmitting data in asynchronous transfer mode includes two phase-locked loops associated with a transmission unit and a reception unit, respectively. Each PLL is provided with a voltage-controlled oscillator formed by an astable multivibrator. The reference current fixing the free oscillating frequency of the multivibrator that is associated with the reception unit corresponds to the frequency adjustment current of the multivibrator that is associated with the transmission unit. Each VCO includes a differential amplifier, connected as a voltage-to-current converter, receiving two voltages corresponding to the phase error of the loop with which it is associated, and providing a frequency adjustment current of its astable multivibrator.
    Type: Grant
    Filed: November 7, 1995
    Date of Patent: September 8, 1998
    Assignee: SGS-Thomson Microelectronics S.A.
    Inventors: Didier Belot, Laurent Dugoujon
  • Differential stage logic circuit
    Patent number: 5734272
    Abstract: An ECL stage has its current consumption adapted to its operation speed. For this purpose, the load resistor and the bias current source are adjustable so that the product of the current value of the source by the resistor value is substantially constant.
    Type: Grant
    Filed: March 6, 1996
    Date of Patent: March 31, 1998
    Assignee: SGS-Thomson Microelectronics S.A.
    Inventors: Didier Belot, Laurent Dugoujon