Patents by Inventor Moustapha El Hassan

Moustapha El Hassan 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).

  • Bulk acoustic wave resonator filter being digitally reconfigurable, with process
    Patent number: 8665038
    Abstract: A filtering circuit with BAW type acoustic resonators having at least a first quadripole and a second quadripole connected in cascade, each quadripole having a branch series with a first acoustic resonator of type BAW and a branch parallel with each branch having an acoustic resonator of type BAW, the first acoustic resonator having a frequency of resonance series approximately equal to the frequency of parallel resonance of the second acoustic resonator, the branch parallel of the first quadripole having a first capacitance connected in series with the second resonator and, in parallel with the capacitance, a first switching transistor to short circuit the capacitance.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: March 4, 2014
    Assignees: STMicroelectronics S.A., Centre National de la Recherche Scientifique
    Inventors: Didier Belot, Alexandre Augusto Shirakawa, Eric Kerherve, Moustapha El Hassan, Yann Deval
  • Bulk acoustic wave resonator with adjustable resonance frequency and use of such a resonator in the field of telephony
    Patent number: 8461941
    Abstract: A bulk acoustic wave resonator has an adjustable resonance frequency. A piezoelectric element is provided having first and second electrodes. A switching element is provided in the form of a MEMS structure which is deformable between a first and second position. The switching element forms an additional electrode that is selectively disposed on top of, and in contact with, one of the first and second electrodes. This causes a total thickness of the electrode of the resonator to be changed resulting in a modification of the resonance frequency of the resonator.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: June 11, 2013
    Assignees: STMicroelectronics S.A., Centre National de la Recherche Scientifique
    Inventors: Didier Belot, Andréia Cathelin, Yann Deval, Moustapha El Hassan, Eric Kerherve, Alexandre Shirakawa
  • BULK ACOUSTIC WAVE RESONATOR WITH ADJUSTABLE RESONANCE FREQUENCY AND USE OF SUCH A RESONATOR IN THE FIELD OF TELEPHONY
    Publication number: 20100060386
    Abstract: A bulk acoustic wave resonator has an adjustable resonance frequency. A piezoelectric element is provided having first and second electrodes. A switching element is provided in the form of a MEMS structure which is deformable between a first and second position. The switching element forms an additional electrode that is selectively disposed on top of, and in contact with, one of the first and second electrodes. This causes a total thickness of the electrode of the resonator to be changed resulting in a modification of the resonance frequency of the resonator.
    Type: Application
    Filed: January 15, 2008
    Publication date: March 11, 2010
    Applicants: STMicroelectronics (Crolles 2) SAS, Centre National de La Recherche Scientifique
    Inventors: Didier Belot, Andrea Cathelin, Yann Deval, Moustapha El Hassan, Eric Kerherve, Alexandre Shirakawa
  • BULK ACOUSTIC WAVE RESONATOR FILTER BEING DIGITALLY RECONFIGURABLE, WITH PROCESS
    Publication number: 20090251235
    Abstract: A filtering circuit with BAW type acoustic resonators having at least a first quadripole and a second quadripole connected in cascade, each quadripole having a branch series with a first acoustic resonator of type BAW and a branch parallel with each branch having an acoustic resonator of type BAW, the first acoustic resonator having a frequency of resonance series approximately equal to the frequency of parallel resonance of the second acoustic resonator, the branch parallel of the first quadripole having a first capacitance connected in series with the second resonator and, in parallel with the capacitance, a first switching transistor to short circuit the capacitance.
    Type: Application
    Filed: February 13, 2009
    Publication date: October 8, 2009
    Applicants: STMICROELECTRONICS S.A., Centre National de la Recherche Scientifique (C.N.R.S.)
    Inventors: Didier Belot, Alexandre Augusto Shirakawa, Eric Kerherve, Moustapha El Hassan, Yann Deval