Patents by Inventor Philippe A. Le Bars

Philippe A. Le Bars 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).

  • Method and device for evaluating the noise associated with turbocodes, and systems using them
    Patent number: 7424070
    Abstract: In order to evaluate the noise related to data issuing from a turbo-encoder, estimates of the noise related to its systematic output, to the data issuing from its first elementary encoder, and to the data issuing from its second elementary encoder are determined. At least two of the estimates of the noise related to the systematic output, to the data issuing from the first encoder, and to the data issuing from the second encoder, are added. The results of these additions are divided by the number of augends added, and then inverted, so as to obtain a noise factor, and the noise factor is multiplied with the data issuing from at least one of the first encoder, second encoder, and systematic output.
    Type: Grant
    Filed: April 28, 2005
    Date of Patent: September 9, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Philippe A. Le Bars, Frederique Ehrmann, Francois Thoumy, Lionel Le Scolan, Samuel Rousselin
  • Optical coupler galvanic isolation device, and modem incorporating it
    Patent number: 5574404
    Abstract: A galvanic isolation device having a light-emitting diode and a photo-transistor. A control circuit, which is coupled to the light-emitting diode and which controls the light-emitting diode, is provided. A signal generator circuit, which is coupled to the photo-transistor, is also provided. The signal generator circuit includes a fixed-gain amplifier circuit that is coupled to a current path formed by a collector electrode and an emitter electrode of the photo-transistor. A biasing circuit, which is coupled to a base electrode of the photo-transistor, biases the photo-transistor into a saturated state.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: November 12, 1996
    Assignee: Apple Computer, Inc.
    Inventor: Philippe A. Le Bars