Patents by Inventor Paul T. Banens

Paul T. Banens 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).

  • High speed variable output power driver
    Patent number: 6466061
    Abstract: The invention relates to a driver circuitry suitable for controlling an operation of a laser or an optical modulator and providing extended dynamic range of the output power and enhanced quality of the output signal. It comprises a power control unit, a pre-driver stage and an output stage. The pre-driver stage and the output stage include differential amplifiers, the output stage amplifier preferably having a cascode configuration. The pre-driver stage provides a preliminary amplification of an input signal which is received and further amplified by the output stage. The power control unit operates in response to a reference signal, e.g. variable DC voltage or a feedback signal, and generates two control signals which control operating points of the pre-driver and the output stage in such a manner that higher output power of the driver corresponds to the higher output signal from the pre-driver stage. Conveniently, both the pre-driver stage and the output stage may be controlled by the same control signal.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: October 15, 2002
    Assignee: Nortel Networks Limited
    Inventors: Petre Popescu, Paul T. Banens
  • High speed variable output power driver
    Publication number: 20020050845
    Abstract: The invention relates to a driver circuitry suitable for controlling an operation of a laser or an optical modulator and providing extended dynamic range of the output power and enhanced quality of the output signal. It comprises a power control unit, a pre-driver stage and an output stage. The pre-driver stage and the output stage include differential amplifiers, the output stage amplifier preferably having a cascode configuration. The pre-driver stage provides a preliminary amplification of an input signal which is received and further amplified by the output stage. The power control unit operates in response to a reference signal, e.g. variable DC voltage or a feedback signal, and generates two control signals which control operating points of the pre-driver and the output stage in such a manner that higher output power of the driver corresponds to the higher output signal from the pre-driver stage. Conveniently, both the pre-driver stage and the output stage may be controlled by the same control signal.
    Type: Application
    Filed: May 3, 2001
    Publication date: May 2, 2002
    Inventors: Petre Popescu, Paul T. Banens