Patents by Inventor John Pigott

John Pigott 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).

  • Publication number: 20030112906
    Abstract: A system and methods are provided for calibrating timing in a remote device to timing in a source device. The source device dictates timing signals to be generated in the remote device. A calibration routine is processed to calibrate timing in the remote device to timing in the source device. The source device provides a reference signal that dictates a period of time to the remote device. The remote device tracks a number of local clock cycles generated for the duration of the dictated period of time. The remote device then establishes a time base for translating a number of clock cycles dictated by the source device to a number of clock cycles generated within the remote device.
    Type: Application
    Filed: December 14, 2001
    Publication date: June 19, 2003
    Inventors: John Pigott, Thomas Jeffrey Reiter
  • Patent number: 5917363
    Abstract: A method (701-717) and apparatus for providing a driver system requiring a reduced number of amplifier circuits. Load driving circuitry (205) is configured to include a single loop amplifier (401) for sequentially receiving multiplexed signals representative of the parameter values and effecting the output of such signals to corresponding loads. Sample-and-hold circuitry is coupled between the output of the loop amplifier (401) and load circuitry within the driver circuits (409, 429, 435) in an arrangement such that only one loop amplifier (401) is required in a multiplexed multi-input system.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: June 29, 1999
    Assignee: Motorola, Inc.
    Inventors: Jaswinder Jandu, John Pigott
  • Patent number: 5386201
    Abstract: An oscillator circuit with enhanced frequency characteristics is provided. This oscillator circuit includes a buffer (102) to amplify the output signal and provide a positive feedback, an inverter (106) to provide negative feedback to cause oscillation, a capacitive divider circuit (110, 112) for charge storage, a resistor (116) to provide controlled discharge, and a diode circuit (114) for providing frequency stability. Since frequency stability is included within the oscillator circuit, there may be no need to perform resistor trimming at the time of manufacture. Further, the capacitive divider circuit eliminates parasitic charge injection.
    Type: Grant
    Filed: November 26, 1993
    Date of Patent: January 31, 1995
    Assignee: Motorola, Inc.
    Inventors: Paul T. Bennett, Randall C. Gray, John Pigott