Patents by Inventor Pedro Jose Moreira

Pedro Jose Moreira 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).

  • Oscillator circuit with switchable compensated amplifiers
    Patent number: 6816024
    Abstract: An oscillator circuit is specified, having an LC resonator, to which two or more current paths are connected, which are connected in parallel with one another and can be connected and disconnected individually by switches. The attenuation compensation amplifiers are in this case coupled to the resonant circuit in order to compensate for its attenuation. The oscillator circuit allows the gradient of the compensation for the attenuation of the resonant circuit to be adjusted, without moving the operating point of the amplifiers. This makes it possible to compensate for manufacturing-dependent component tolerances and any amplitude discrepancy caused by them, in a simple way. The oscillator circuit is suitable, for example, for use in voltage-controlled oscillators in order to form phase-locked loops when using mass production technologies.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: November 9, 2004
    Assignee: Infineon Technologies AG
    Inventors: Klaus-Jürgen Feilkas, Hans Geltinger, Pedro Jose Moreira
  • Compensated oscillator circuit
    Publication number: 20040100339
    Abstract: An oscillator circuit is specified, having an LC resonator, to which two or more current paths are connected, which are connected in parallel with one another and can be connected and disconnected individually by switches. The attenuation compensation amplifiers are in this case coupled to the resonant circuit in order to compensate for its attenuation. The oscillator circuit allows the gradient of the compensation for the attenuation of the resonant circuit to be adjusted, without moving the operating point of the amplifiers. This makes it possible to compensate for manufacturing-dependent component tolerances and any amplitude discrepancy caused by them, in a simple way. The oscillator circuit is suitable, for example, for use in voltage-controlled oscillators in order to form phase-locked loops when using mass production technologies.
    Type: Application
    Filed: November 21, 2003
    Publication date: May 27, 2004
    Inventors: Klaus-Jurgen Feilkas, Hans Geltinger, Pedro Jose Moreira