Patents by Inventor Douglas A. Scratchley

Douglas A. Scratchley 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).

  • Precision, low drift, stacked voltage reference
    Patent number: 7372318
    Abstract: A voltage reference circuit receives an input voltage at a first port and a time varying input signal at a second port. The voltage reference circuit includes a switching circuit that is responsive to the first and second ports, and that generates an AC signal from the input voltage. The voltage reference circuit further includes a voltage multiplier circuit, coupled to the switching circuit to receive the AC signal and to create a DC signal with a selected voltage level. The voltage reference circuit further includes a plurality of voltage reference modules, coupled together to form a voltage reference stack, and coupled to the voltage multiplier circuit to receive the selected voltage level and output a precise reference voltage.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: May 13, 2008
    Assignee: Honeywell International Inc.
    Inventors: Douglas A. Scratchley, Charles F. Hayek, Ernest Frank John Graetz
  • Precision, low drift, closed loop voltage reference
    Patent number: 7161409
    Abstract: A voltage reference circuit receives an input voltage through a first port and a time varying input signal through a second port. The voltage reference circuit includes a switching circuit that is responsive to the first and the second ports and that generates an AC signal from the input voltage. The voltage reference circuit further includes a voltage multiplier circuit, coupled to the switching circuit that receives the AC signal and creates a DC signal with a selected voltage level. The voltage reference circuit further includes a voltage regulator, coupled to the voltage multiplier circuit that regulates the DC signal from the voltage multiplier circuit. A regulated output voltage is provided through an output port.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: January 9, 2007
    Inventors: Douglas A. Scratchley, Quan T. Nguyen, Ernest Graetz
  • Precision, low drift, closed loop voltage reference
    Publication number: 20060017492
    Abstract: A voltage reference circuit receives an input voltage through a first port and a time varying input signal through a second port. The voltage reference circuit includes a switching circuit that is responsive to the first and the second ports and that generates an AC signal from the input voltage. The voltage reference circuit further includes a voltage multiplier circuit, coupled to switching circuit that receives the AC signal and creates a DC signal with a selected voltage level. The voltage reference circuit further includes a voltage regulator, coupled to the voltage multiplier circuit that regulates the DC signal from the voltage multiplier circuit. An output voltage is provided through an output port.
    Type: Application
    Filed: July 26, 2004
    Publication date: January 26, 2006
    Inventors: Douglas Scratchley, Quan Nguyen, Ernest Graetz
  • Precision, low drift, stacked voltage reference
    Publication number: 20060017493
    Abstract: A voltage reference circuit receives an input voltage at a first port and a time varying input signal at a second port. The voltage reference circuit includes a switching circuit that is responsive to the first and second ports, and that generates an AC signal from the input voltage. The voltage reference circuit further includes a voltage multiplier circuit, coupled to the switching circuit to receive the AC signal and to create a DC signal with a selected voltage level. The voltage reference circuit further includes a plurality of voltage reference modules, coupled together to form a voltage reference stack, and coupled to the voltage multiplier circuit to receive the selected voltage level and output a precise reference voltage.
    Type: Application
    Filed: July 26, 2004
    Publication date: January 26, 2006
    Inventors: Douglas Scratchley, Charles Hayek, Ernest Frank Graetz