Patents by Inventor Said Touimer

Said Touimer 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).

  • Active predistorting linearizer with agile bypass circuit for safe mode operation
    Patent number: 6809587
    Abstract: An active predistorting linearizer with agile bypass circuit for safe mode operation is used in conjunction with an amplifier. This linearizer comprises a controllable input variable-attenuator and drive-amplifier circuit supplied with the input signal to attenuate and amplify the input signal. A predistorter includes a controllable phase-shifting and amplitude-adjusting path supplied with the attenuated and amplified input signal to distort the latter signal and produce a predistorted output signal. A controllable output variable-attenuator and drive-amplifier circuit is supplied with the predistorted output signal to attenuate and amplify this predistorted output signal before supplying it to the power amplifier. A phase-shifting and amplitude-adjusting controller is connected to the controllable input variable-attenuator and drive-amplifier circuit, the controllable phase-shifting and amplitude-adjusting path, and the controllable output variable-attenuator and drive-amplifier circuit.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: October 26, 2004
    Assignee: Mitec Telecom Inc.
    Inventors: Fadhel Ghannouchi, Said Touimer, François Beauregard, Chan-Wang Park, Ahmed A. Boutouili
  • Active predistorting linearizer with agile bypass circuit for safe mode operation
    Publication number: 20030197559
    Abstract: An active predistorting linearizer with agile bypass circuit for safe mode operation is used in conjunction with an amplifier. This linearizer comprises a controllable input variable-attenuator and drive-amplifier circuit supplied with the input signal to attenuate and amplify the input signal. A predistorter includes a controllable phase-shifting and amplitude-adjusting path supplied with the attenuated and amplified input signal to distort the latter signal and produce a predistorted output signal. A controllable output variable-attenuator and drive-amplifier circuit is supplied with the predistorted output signal to attenuate and amplify this predistorted output signal before supplying it to the power amplifier. A phase-shifting and amplitude-adjusting controller is connected to the controllable input variable-attenuator and drive-amplifier circuit, the controllable phase-shifting and amplitude-adjusting path, and the controllable output variable-attenuator and drive-amplifier circuit.
    Type: Application
    Filed: April 23, 2002
    Publication date: October 23, 2003
    Inventors: Fadhel Ghannouchi, Said Touimer, Francois Beauregard, Chan-Wang Park, Ahmed A. Boutouili
  • Temperature compensated and digitally controlled amplitude and phase channel amplifier linearizer for multi-carrier amplification systems
    Patent number: 6255908
    Abstract: A linearizer channel amplifier for use in conjunction with a power amplifier comprises an input series circuit formed of a first variable attenuator, an input drive amplifier and a power limiter, and an output series circuit formed of a second variable attenuator and an output drive amplifier. Between the input and output series circuits is interposed a linearizer. In this linearizer, a splitter produces first and second signal portions, a first path comprises serially interconnected predistorter and third variable attenuator for distorting and adjusting the amplitude of the first signal portion, a second path comprises serially interconnected phase shifter and fourth variable attenuator for phase-shifting and adjusting the amplitude of the second signal portion, and a combiner combines the distorted and amplitude-adjusted first signal portion and the phase-shifted and amplitude-adjusted second signal portion to form a predistorted output signal applied to the output series circuit.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: July 3, 2001
    Assignee: Amplix
    Inventors: Fadhel Ghannouchi, Said Touimer, François Beauregard, Ammar B. Kouki