Patents by Inventor Philippe Jouen

Philippe Jouen 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).

  • RF integrated circuit comprising a frequency synthesizer not very sensitive to injection locking
    Patent number: 7324788
    Abstract: The present invention relates to an RF integrated circuit comprising a frequency synthesizer and a QAM modulator for modulating a baseband signal of frequency FBB, the frequency synthesizer supplying to the QAM modulator an output signal of frequency F1 adjustable with a frequency step ?F1, for forming a carrier signal of the QAM modulator. According to the present invention, the frequency synthesizer is a Vernier effect frequency synthesizer comprising an auxiliary frequency synthesizer supplying an auxiliary signal of frequency F2 adjustable with a frequency step ?F2 and a main frequency synthesizer having a phase-locked loop bandwidth at least two times higher than the frequency step ?F2 of the auxiliary signal.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: January 29, 2008
    Assignee: STMicroelectronics S.A.
    Inventors: Serge Ramet, Pascal Triaire, Philippe Jouen
  • Phase-locked loop with high frequency adjustment of the operating range of the oscillator
    Patent number: 6949980
    Abstract: A phase-locked loop including an oscillator, controlled by a control signal generated by a comparison circuit comparing a reference frequency and the oscillator frequency and filtered by an integrator low-pass filter; a control and adjustment circuit for, with a predetermined frequency smaller than the reference frequency, taking into account the value of the filtered controlled signal and, if this value is out of a range of predetermined values, adjusting the operating range of the oscillator; and an inhibition circuit for deactivating the comparison circuit for a predetermined duration before taking into account the value of the filtered control signal.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: September 27, 2005
    Assignee: STMicroelectronics S.A.
    Inventors: Philippe Jouen, Michael Kraemer
  • RF integrated circuit comprising a frequency synthesizer not very sensitive to injection locking
    Publication number: 20050186918
    Abstract: The present invention relates to an RF integrated circuit comprising a frequency synthesizer and a QAM modulator for modulating a baseband signal of frequency FBB, the frequency synthesizer supplying to the QAM modulator an output signal of frequency F1 adjustable with a frequency step ?F1, for forming a carrier signal of the QAM modulator. According to the present invention, the frequency synthesizer is a Vernier effect frequency synthesizer comprising an auxiliary frequency synthesizer supplying an auxiliary signal of frequency F2 adjustable with a frequency step ?F2 and a main frequency synthesizer having a phase-locked loop bandwidth at least two times higher than the frequency step ?F2 of the auxiliary signal.
    Type: Application
    Filed: January 14, 2005
    Publication date: August 25, 2005
    Applicant: STMicroelectronics SA
    Inventors: Serge Ramet, Pascal Triaire, Philippe Jouen
  • Phase-locked loop made in integrated circuit form
    Publication number: 20040160279
    Abstract: A phase-locked loop including an oscillator, controlled by a control signal generated by a comparison circuit comparing a reference frequency and the oscillator frequency and filtered by an integrator low-pass filter; a control and adjustment circuit for, with a predetermined frequency smaller than the reference frequency, taking into account the value of the filtered controlled signal and, if this value is out of a range of predetermined values, adjusting the operating range of the oscillator; and an inhibition circuit for deactivating the comparison circuit for a predetermined duration before taking into account the value of the filtered control signal.
    Type: Application
    Filed: September 30, 2003
    Publication date: August 19, 2004
    Applicant: STMicroelectronics S.A.
    Inventors: Philippe Jouen, Michael Kraemer
  • Phase-locked loop made in integrated circuit form
    Publication number: 20030042986
    Abstract: A phase-locked loop including an oscillator, controlled by a control signal generated by a comparison circuit comparing a reference frequency and the oscillator frequency and filtered by an integrator low-pass filter; a control and adjustment circuit for, with a predetermined frequency smaller than the reference frequency, taking into account the value of the filtered controlled signal and, if this value is out of a range of predetermined values, adjusting the operating range of the oscillator; and an inhibition circuit for deactivating the comparison circuit for a predetermined duration before taking into account the value of the filtered control signal.
    Type: Application
    Filed: September 5, 2002
    Publication date: March 6, 2003
    Inventors: Philippe Jouen, Michael Kraemer
  • Current equalizing circuit
    Patent number: 4994759
    Abstract: A circuit supplies a current (I) in which the current variations (I.sub.L) having been equalized according to a given relationship. In order to obtain an equalization characteristic having at least two slopes, the circuit uses the switching of the current sources (xI.sub.o, yI.sub.o and zI.sub.o) by means of switching stages (T.sub.1, T.sub.2, T.sub.14). The output current I passing through the current output stages T.sub.3 and T.sub.4 thus fluctuates between two levels according to the desired equalizing relationship.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: February 19, 1991
    Assignee: U.S. Philips Corporation
    Inventors: Philippe Jouen, Jose Favoretto