Patents by Inventor Gregory S. Raven

Gregory S. Raven 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 apparatus for generating constant envelope modulation using a quadrature transmitter
    Patent number: 7864882
    Abstract: A multi-mode communication device (100) uses a quadrature transmitter (102) for transmitting both amplitude and constant envelope angle-modulated signals. For angle modulation, a separate feedback path is used from that used for amplitude modulated signal transmission. An FM receiver (136) is used to produce error signals (214, 216) used in correcting the I and Q quadrature signals (206, 208).
    Type: Grant
    Filed: December 30, 2006
    Date of Patent: January 4, 2011
    Assignee: Motorola Mobility, Inc.
    Inventors: George C. Anderson, Jose E. Korneluk, Gregory S. Raven
  • Multi-mode communication device for generating constant envelope modulated signals using a quadrature modulator
    Patent number: 7801246
    Abstract: A quadrature modulated transceiver (102) is used to generate a constant envelope angle modulated signal for communications. To produce the required feedback when operating in the constant envelope mode, an orthogonal frequency division multiplexed receiver (136) is used.
    Type: Grant
    Filed: December 30, 2006
    Date of Patent: September 21, 2010
    Assignee: Motorola Mobility, Inc.
    Inventors: George C. Anderson, Jose E. Korneluk, Gregory S. Raven
  • METHOD AND DEVICE FOR GENERATING CONSTANT ENVELOPE MODULATION USING A QUADRATURE MODULATOR
    Publication number: 20080159418
    Abstract: A quadrature modulated transceiver (102) is used to generate a constant envelope angle modulated signal for communications. To produce the required feedback when operating in the constant envelope mode, an orthogonal frequency division multiplexed receiver (136) is used.
    Type: Application
    Filed: December 30, 2006
    Publication date: July 3, 2008
    Applicant: MOTOROLA, INC.
    Inventors: George C. Anderson, Jose E. Korneluk, Gregory S. Raven
  • METHOD AND APPARATUS FOR GENERATING CONSTANT ENVELOPE MODULATION USING A QUADRATURE TRANSMITTER
    Publication number: 20080160933
    Abstract: A multi-mode communication device (100) uses a quadrature transmitter (102) for transmitting both amplitude and constant envelope angle-modulated signals. For angle modulation, a separate feedback path is used from that used for amplitude modulated signal transmission. An FM receiver (136) is used to produce error signals (214, 216) used in correcting the I and Q quadrature signals (206, 208).
    Type: Application
    Filed: December 30, 2006
    Publication date: July 3, 2008
    Applicant: MOTOROLA, INC.
    Inventors: GEORGE C. ANDERSON, JOSE E. KORNELUK, GREGORY S. RAVEN
  • Method and apparatus for producing an offset frequency
    Patent number: 6297703
    Abstract: A frequency generation device (100) comprises a cascade of two phase-locked loops (104 and 108). The first PLL (104) is a frequency synthesizer while the second PLL, or offset loop (108), comprises a phase detector (208 or 306), loop filter (210 or 310), VCO (212 or 312) and a divider with near-unity modulus (204 or 308). In the case of a negative offset design, the near-unity divider (204) is placed in the offset loop feedback path. In a positive offset design, the near-unity divider (308) is placed in the path between the synthesizer VCO and the offset loop phase detector. Unlike existing art, there is no offset signal input to the second or offset loop (108).
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: October 2, 2001
    Assignee: Motorola, Inc.
    Inventors: Frederick L. Martin, Gregory S. Raven, Jeffrey A. Rollman
  • Variable gain amplifier
    Patent number: 5023569
    Abstract: An amplification device (18) has its gain controlled by varying the current flowing into the amplification device. The current is varied (36) by a means of a variable bias network that adapts the input current in response to a control signal. In this way, the amplification device is provided with variable gain while avoiding parametric regeneration.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: June 11, 1991
    Assignee: Motorola, Inc.
    Inventor: Gregory S. Raven