Patents by Inventor Sofoklis E. Plevridis

Sofoklis E. Plevridis 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).

  • Multi-mode transmit and receive PLL
    Patent number: 7869782
    Abstract: A local oscillator (LO) signal generator that has a reference phase-locked loop (PLL), a receiver LO PLL and a transmitter LO PLL. A reference PLL is coupled to receive a reference clock input and to generate a reference PLL signal at its output, which then drives a receiver PLL and a transmitter PLL. The receiver PLL is coupled to receive the reference PLL signal and to use the reference PLL signal as its reference input to generate a receiver LO signal at its output. The transmitter PLL is coupled to receive the reference PLL signal and to use the reference PLL signal as its reference input to generate a transmitter LO signal at its output.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: January 11, 2011
    Assignee: Broadcom Corporation
    Inventors: Sofoklis E. Plevridis, Konstantinos D. Vavelidis, Theodoros Georgantas, Ilias A. Bouras
  • Gain step calibration in a mobile cellular transmitter
    Patent number: 7573410
    Abstract: A technique to utilize digital gain control to fine adjust gain for one or more analog gain steps of an analog circuit. A gain step calibration procedure is utilized to set the digital gain within acceptable limits established for the analog gain at a particular operating gain level for the analog circuit set by an analog gain step.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: August 11, 2009
    Assignee: Broadcom Corporation
    Inventors: Theodoros Georgantas, Sofoklis E. Plevridis, Konstantinos D. Vavelidis
  • Multi-mode transmit and receive PLL
    Publication number: 20090156149
    Abstract: A local oscillator (LO) signal generator that has a reference phase-locked loop (PLL), a receiver LO PLL and a transmitter LO PLL. A reference PLL is coupled to receive a reference clock input and to generate a reference PLL signal at its output, which then drives a receiver PLL and a transmitter PLL. The receiver PLL is coupled to receive the reference PLL signal and to use the reference PLL signal as its reference input to generate a receiver LO signal at its output. The transmitter PLL is coupled to receive the reference PLL signal and to use the reference PLL signal as its reference input to generate a transmitter LO signal at its output.
    Type: Application
    Filed: December 14, 2007
    Publication date: June 18, 2009
    Applicant: BROADCOM CORPORATION
    Inventors: Sofoklis E. Plevridis, Konstantinos D. Vavelidis, Theodoros Georgantas, Ilias A. Bouras