Patents by Inventor David Huffman

David Huffman 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).

  • Patent number: 11784648
    Abstract: A field programmable gate array (FPGA) comprises a set of configurable logic blocks (CLBs), input/output blocks (IOBs), and interconnect wiring for communicating data between the CLBs and IOBs. A resonating circuit provides a resonating signal to the circuit blocks. The circuit blocks provide the resonating signal to the interconnect wires to communicate a first binary value, and a static voltage to communicate a second binary value. The output signals of the circuit blocks change state when the resonating signal is at or near the static voltage. This reduces switching losses that exist within prior art FPGAs.
    Type: Grant
    Filed: May 23, 2022
    Date of Patent: October 10, 2023
    Assignee: Power Down Semiconductor, Inc.
    Inventor: David A Huffman
  • Publication number: 20220393684
    Abstract: A field programmable gate array (FPGA) comprises a set of configurable logic blocks (CLBs), input/output blocks (IOBs), and interconnect wiring for communicating data between the CLBs and IOBs. A resonating circuit provides a resonating signal to the circuit blocks. The circuit blocks provide the resonating signal to the interconnect wires to communicate a first binary value, and a static voltage to communicate a second binary value. The output signals of the circuit blocks change state when the resonating signal is at or near the static voltage. This reduces switching losses that exist within prior art FPGAs.
    Type: Application
    Filed: May 23, 2022
    Publication date: December 8, 2022
    Inventor: David A Huffman
  • Patent number: 11297807
    Abstract: A ramped platform device for a vivarium includes a first plate that has a fastener engaged to an upper for coupling to an upper rim of a wall of the vivarium, such as an aquarium or a terrarium. The first plate is in substantial abutment to an inner face of the wall. A platform is coupled to and extends substantially perpendicularly from a lower end of the first plate. A second plate that is coupled to and which extends transversely and downwardly from a perimeter of the platform allows an animal to climb up to and down from the platform.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: April 12, 2022
    Inventor: David Huffman
  • Publication number: 20210227804
    Abstract: A ramped platform device for a vivarium includes a first plate that has a fastener engaged to an upper for coupling to an upper rim of a wall of the vivarium, such as an aquarium or a terrarium. The first plate is in substantial abutment to an inner face of the wall. A platform is coupled to and extends substantially perpendicularly from a lower end of the first plate. A second plate that is coupled to and which extends transversely and downwardly from a perimeter of the platform allows an animal to climb up to and down from the platform.
    Type: Application
    Filed: January 29, 2020
    Publication date: July 29, 2021
    Inventor: David Huffman
  • Patent number: 10510399
    Abstract: An SRAM cell comprises a first inverter having an output lead coupled to the input lead of a second inverter via a first resistor. The output lead of the second inverter is coupled to the first inverter input lead via a second resistor. A first write bit line is coupled to the first inverter input lead via a first switch, and a second write bit line is coupled to the second inverter input lead via a second switch. Because of the resistors, the circuitry driving write bit lines does not have to overpower the inverters when writing data to the cell. The cell is part of an array comprising several columns of SRAM cells, each column coupled to a pair of write bit lines. A resonating oscillator drives the write bit lines with a sine wave. This reduces the power consumed by the SRAM array.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: December 17, 2019
    Assignee: Power Down Semiconductor Inc.
    Inventor: David A. Huffman
  • Patent number: 10319422
    Abstract: A decoder according to one embodiment of the invention includes a set of lines, a resonator circuit, a set of input leads for receiving input signals, and a set of switches for coupling some of the lines within the set of lines to the resonator circuit in response to the input signals while the other lines within the set of lines are at a first binary voltage. The lines are coupled to a set of pointer circuits. The pointer circuits perform logic functions on the signals on the lines when the resonating signal is at a second binary voltage opposite the first binary voltage to thereby decode the input signals. Because the lines are driven high and low by a resonator circuit, the decoder circuit power consumption is less than it would be if the lines were pulled up and down by a set of pullup and pulldown transistors.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: June 11, 2019
    Inventor: David A. Huffman
  • Publication number: 20180218768
    Abstract: An SRAM cell comprises a first inverter having an output lead coupled to the input lead of a second inverter via a first resistor. The output lead of the second inverter is coupled to the first inverter input lead via a second resistor. A first write bit line is coupled to the first inverter input lead via a first switch, and a second write bit line is coupled to the second inverter input lead via a second switch. Because of the resistors, the circuitry driving write bit lines does not have to overpower the inverters when writing data to the cell. The cell is part of an array comprising several columns of SRAM cells, each column coupled to a pair of write bit lines. A resonating oscillator drives the write bit lines with a sine wave. This reduces the power consumed by the SRAM array.
    Type: Application
    Filed: July 26, 2016
    Publication date: August 2, 2018
    Inventor: David A. Huffman
  • Publication number: 20180211698
    Abstract: A decoder according to one embodiment of the invention includes a set of lines, a resonator circuit, a set of input leads for receiving input signals, and a set of switches for coupling some of the lines within the set of lines to the resonator circuit in response to the input signals while the other lines within the set of lines are at a first binary voltage. The lines are coupled to a set of pointer circuits. The pointer circuits perform logic functions on the signals on the lines when the resonating signal is at a second binary voltage opposite the first binary voltage to thereby decode the input signals. Because the lines are driven high and low by a resonator circuit, the decoder circuit power consumption is less than it would be if the lines were pulled up and down by a set of pullup and pulldown transistors.
    Type: Application
    Filed: July 26, 2016
    Publication date: July 26, 2018
    Inventor: David A. Huffman
  • Patent number: 8467978
    Abstract: A method and apparatus for inspecting a surface of an object. Data from measuring the surface of the object is obtained to form surface data for the object. A range of frequencies for features on the object is selected based on a range of distances between adjacent peaks for the features. The features are formed by a tool moving along a number of paths. Desired surface data for the features is obtained from the surface data using the range of frequencies selected. A determination is made as to whether the desired surface data for the features meets a policy specifying a desired surface for the object. In response to an absence of a determination that the desired surface data for the features meets the policy, the object is reworked.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: June 18, 2013
    Assignee: The Boeing Company
    Inventors: Michael David Huffman, Andrew James Booker, Thomas A. Hogan, Alan K. Jones, Bruce C. Andrews
  • Publication number: 20120053854
    Abstract: A method and apparatus for inspecting a surface of an object. Data from measuring the surface of the object is obtained to form surface data for the object. A range of frequencies for features on the object is selected based on a range of distances between adjacent peaks for the features. The features are formed by a tool moving along a number of paths. Desired surface data for the features is obtained from the surface data using the range of frequencies selected. A determination is made as to whether the desired surface data for the features meets a policy specifying a desired surface for the object. In response to an absence of a determination that the desired surface data for the features meets the policy, the object is reworked.
    Type: Application
    Filed: August 31, 2010
    Publication date: March 1, 2012
    Applicant: THE BOEING COMPANY
    Inventors: Michael David Huffman, Andrew James Booker, Thomas A. Hogan, Alan K. Jones, Bruce C. Andrews
  • Publication number: 20080006722
    Abstract: A spray nozzle assembly is provided. The spray nozzle assembly includes a nozzle body having a liquid passage that terminates in a nozzle body orifice. The spray nozzle assembly includes an impingement element having an impingement surface spaced from the nozzle body orifice. One or more air outlet orifices are disposed upstream of the impingement surface and oriented to discharge a substantially tubular curtain of air around the nozzle body orifice. An air cap defines a chamber extending around and downstream of the impingement surface. The air cap has a plurality of discharge orifices. At least one of the discharge orifices in the air cap has an associated nipple that is integrally connected to the air cap and extends the discharge orifice outwardly away from an outer face of the air cap.
    Type: Application
    Filed: August 25, 2005
    Publication date: January 10, 2008
    Applicant: SPRAYING SYSTEMS CO.
    Inventor: David Huffman
  • Publication number: 20070262172
    Abstract: A modular spray gun assembly is provided. The modular spray gun assembly includes a spray gun body, a spray nozzle module and a plurality of control modules. The spray nozzle module is releaseably attachable to a downstream end of the nozzle body with a first retainer that engages a portion of the downstream end of the spray gun body. The plurality of control modules are interchangeably mountable on an upstream end of the spray gun body. A portion of each control module is receivable in a counterbore in the upstream end of the spray gun body. Each control module is releaseably attachable to the spray gun body with a second retainer that engages a portion of the upstream end of the spray gun body.
    Type: Application
    Filed: March 26, 2004
    Publication date: November 15, 2007
    Applicant: Spraying Systems Co.
    Inventor: David Huffman
  • Patent number: 7292214
    Abstract: A method for operating a display having a plurality of pixel elements includes applying a transition voltage to the plurality of pixel elements, applying a first paint voltage to one pixel element of the plurality pixel elements, waiting a predetermined time period, illuminating the one pixel element, applying the transition voltage to the plurality of pixel elements, applying a second paint voltage to the one pixel element elements, waiting the predetermined time period, and illuminating the one pixel element. The transition voltage is different from the first paint voltage applied to the one pixel element.
    Type: Grant
    Filed: January 10, 2000
    Date of Patent: November 6, 2007
    Assignee: Microdisplay Corporation
    Inventors: Michael Bolotski, David Huffman
  • Publication number: 20070029411
    Abstract: A modular automatic spray gun manifold is provided. The manifold includes a plurality of spray gun modules arranged in an array in laterally spaced relation from each other. A junction element is arranged at an upstream end of the manifold for introducing fluid into the manifold. A first support assembly is arranged between the junction element and a first spray gun module in the spray gun module array for supporting the first spray gun module relative to the junction element. The first support assembly includes a plurality of fluid conduits for supplying fluid to the first spray gun module. One or more second support assemblies with one second support assembly are arranged between each adjacent pair of spray gun modules in the array of spray gun modules for supporting the adjacent pair of spray gun modules relative to each other.
    Type: Application
    Filed: July 31, 2006
    Publication date: February 8, 2007
    Applicant: Spraying Systems Co.
    Inventors: David Huffman, Russell Frechette
  • Publication number: 20060197835
    Abstract: A display system includes a wristwatch-sized device that a user, such as a soldier on a battlefield, can wear, a data receiver, and a small video display. The device can receive data, such as video or still digital imagery captured by an unmanned aerial vehicle (UAV) in flight or unmanned ground vehicle, and display it in real-time for the user to view.
    Type: Application
    Filed: March 4, 2005
    Publication date: September 7, 2006
    Inventors: Robert Anderson, Jerome Conway, David Huffman, Keith Tognoni
  • Publication number: 20060108443
    Abstract: A lance-type spraying assembly for directing a reducing agent into a combustion zone or discharging combustion gases for Nox emission control. The spraying assembly including a lance body having an inlet end and a downstream end and a spray nozzle arranged at the downstream end of the lance body. The lance body includes an air passage for connection to an air supply, a liquid reducing agent supply passage for connection to a liquid reducing agent supply and a liquid reducing agent return passage. The liquid reducing agent supply passage communicates with the spray nozzle. The liquid reducing agent return passage communicates with the liquid reducing agent supply passage near the downstream end of the lance body for recirculating a portion of the liquid reducing agent and extends near the liquid reducing agent supply passage along at least a portion of the length thereof in order to help cool the liquid reducing agent therein. The liquid reducing agent return passage is sealed against the spray nozzle.
    Type: Application
    Filed: October 2, 2003
    Publication date: May 25, 2006
    Applicant: Spraying Systems Co.
    Inventors: David Huffman, Michel Thenin
  • Publication number: 20060097070
    Abstract: A spray device comprising a body having a liquid discharge passage and a spray nozzle assembly affixed to the body is provided. The spray nozzle assembly includes a liquid spray tip for directing liquid from the liquid passage in the body into a predetermined spray pattern and an atomizing fluid cap. The liquid spray tip includes a forwardly extending nose portion that defines a liquid discharge orifice. The nose extends through a central opening in the air cap thereby defining an annular atomizing fluid discharge orifice that communicates with an atomizing fluid inlet. The nose extends in a downstream direction past the central opening in the air cap such that the liquid discharge orifice is arranged at least approximately 2 mm. downstream of the annular atomizing fluid discharge orifice.
    Type: Application
    Filed: October 14, 2003
    Publication date: May 11, 2006
    Applicant: Spraying Systems Co.
    Inventor: David Huffman
  • Publication number: 20060038041
    Abstract: An internal mix spray nozzle assembly adapted for operation with lesser pressurized air requirements. The spray nozzle assembly includes a liquid passage for directing a liquid flow stream against an impingement pin, and an air guide is provided for forming an annular pressurized air passage about the liquid flow stream for striking and atomizing a laterally spreading dispersion of liquid from the impingement surface. For enhancing liquid atomization, the air guide defines a relatively narrow width air flow opening for substantially accelerating and increasing the pressure of the atomizing air stream, and the impingement pin is formed with a relatively large primary impinging surface and a parallel downstream secondary impingement surface that facilitates further liquid particle breakdown and prevents the accumulation of liquids about the bottom of the impingement pin.
    Type: Application
    Filed: August 23, 2005
    Publication date: February 23, 2006
    Applicant: SPRAYING SYSTEMS CO.
    Inventors: David Huffman, John Ekpenyong, John Bartell
  • Publication number: 20050280662
    Abstract: A method and apparatus for diminishing display transients and jitter. The method and system disclosed utilizes prior illumination and position histories in displaying and illuminating representations, and elements comprising the representations, on the display. Recognizing repeated representations, finding their prior and current positions, and determining if the difference in position is over a threshold value, diminishes the jitter by displaying the representation in the new position if over the threshold value, or, if it is not over the threshold value, then displaying it in the prior location. The illumination of an element at an intensity, which is based on prior illuminations and/or intensities of the element, diminishes the transients by avoiding flashing or flicker of transient illuminations.
    Type: Application
    Filed: August 25, 2005
    Publication date: December 22, 2005
    Inventors: Keith Tognoni, David Huffman, James Parker
  • Publication number: 20050035225
    Abstract: A modular automatic spray gun manifold is provided. The manifold includes a plurality of spray gun modules arranged in an array in laterally spaced relation from each other. A junction element is arranged at an upstream end of the manifold. The junction element includes a liquid supply connection and a pressurized air connection. A first support assembly is arranged between the junction element and a first spray gun module in the spray gun module array for supporting the first spray gun module relative to the junction element. The first support assembly includes a plurality of fluid conduits for supplying fluid to the first spray gun module. The fluid conduits in the first support assembly communicate with the liquid supply and pressurized air supply connections of the junction element. A second support assembly is arranged between each adjacent pair of spray gun modules in the array of spray gun modules for supporting the adjacent pair of spray gun modules relative to each other.
    Type: Application
    Filed: March 26, 2004
    Publication date: February 17, 2005
    Applicant: Spraying Systems Co.
    Inventor: David Huffman