Patents by Inventor Douglas J. Sheldon

Douglas J. Sheldon 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: 9735612
    Abstract: Unmanned space programs are currently used to enable scientists to explore and research the furthest reaches of outer space. Systems and methods for low power communication devices in accordance with embodiments of the invention are disclosed, describing a wide variety of low power communication devices capable of remotely collecting, processing, and transmitting data from outer space in order to further mankind's goal of exploring the cosmos. Many embodiments of the invention include a Flash-based FPGA, an energy-harvesting power supply module, a sensor module, and a radio module. By utilizing technologies that withstand the harsh environment of outer space, more reliable low power communication devices can be deployed, enhancing the quality and longevity of the low power communication devices, enabling more data to be gathered and aiding in the exploration of outer space.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: August 15, 2017
    Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventor: Douglas J. Sheldon
  • Patent number: 8392869
    Abstract: Systems and methods for estimating the lifetime of an electrical system in accordance with embodiments of the invention are disclosed. One embodiment of the invention includes iteratively performing Worst Case Analysis (WCA) on a system design with respect to different system lifetimes using a computer to determine the lifetime at which the worst case performance of the system indicates the system will pass with zero margin or fail within a predetermined margin for error given the environment experienced by the system during its lifetime.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: March 5, 2013
    Assignee: California Institute of Technology
    Inventors: Timothy L. Heaps, Douglas J. Sheldon, Paul N. Bowerman, Chester J. Everline, Eddy Shalom, Robert D. Rasmussen
  • Publication number: 20120117528
    Abstract: Systems and methods for estimating the lifetime of an electrical system in accordance with embodiments of the invention are disclosed. One embodiment of the invention includes iteratively performing Worst Case Analysis (WCA) on a system design with respect to different system lifetimes using a computer to determine the lifetime at which the worst case performance of the system indicates the system will pass with zero margin or fail within a predetermined margin for error given the environment experienced by the system during its lifetime.
    Type: Application
    Filed: June 15, 2011
    Publication date: May 10, 2012
    Applicant: California Institute of Technology
    Inventors: Timothy L. Heaps, Douglas J. Sheldon, Paul N. Bowerman, Chester J. Everline, Eddy Shalom, Robert D. Rasmussen
  • Publication number: 20120098645
    Abstract: Unmanned space programs are currently used to enable scientists to explore and research the furthest reaches of outer space. Systems and methods for low power communication devices in accordance with embodiments of the invention are disclosed, describing a wide variety of low power communication devices capable of remotely collecting, processing, and transmitting data from outer space in order to further mankind's goal of exploring the cosmos. Many embodiments of the invention include a Flash-based FPGA, an energy-harvesting power supply module, a sensor module, and a radio module. By utilizing technologies that withstand the harsh environment of outer space, more reliable low power communication devices can be deployed, enhancing the quality and longevity of the low power communication devices, enabling more data to be gathered and aiding in the exploration of outer space.
    Type: Application
    Filed: October 25, 2011
    Publication date: April 26, 2012
    Applicant: California Institute of Technology
    Inventor: Douglas J. Sheldon
  • Patent number: 7809521
    Abstract: A high resolution circuit and method for facilitating precise measurement of on-chip delays for FPGAs for reliability studies. The circuit embeds a pulse generator on an FPGA chip having one or more groups of LUTS (the “LUT delay chain”), also on-chip. The circuit also embeds a pulse width measurement circuit on-chip, and measures the duration of the generated pulse through the delay chain. The pulse width of the output pulse represents the delay through the delay chain without any I/O delay. The pulse width measurement circuit uses an additional asynchronous clock autonomous from the main clock and the FPGA propagation delay can be displayed on a hex display continuously for testing purposes.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: October 5, 2010
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Gary R. Burke, Yuan Chen, Douglas J. Sheldon