Electrical Engineering

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  • Inventor(s):
    John Simon, Debdeep Jena, Huili (Grace) Xing
    Patent Number:
    US 8835998 B2
    Description:

    A compositionally graded semiconductor device and a method of making same are disclosed that provides an efficient p-type doping for wide bandgap semiconductors by exploiting electronic polarization within the crystalline lattice. The compositional graded semiconductor graded device includes a graded heterojunction interface that exhibits a 3D bound polarization-induced sheet charge that spreads in accordance with .rho..sub..pi.(z)=-.gradient.P(z), where .rho..sub..pi.(z) is a volume charge d…

    Date Issued:
    2014-09-16
    Resource Type
    Patent
  • Inventor(s):
    Zhou Yu, Bruno Kristiaan Bernard De Man, Jean-Baptiste Thibault, Debashish Pal, Lin Fu, Charles A. Bouman, Ken D. Sauer, Sathish Ramani, Jeffrey Allen Fessler, Somesh Srivastava
    Patent Number:
    US 8885975 B2
    Description:

    A method is provided for reconstructing an image of an object that includes image elements. The method includes accessing measurement data associated with the image elements, introducing an auxiliary variable to transform an original problem of reconstructing the image to a constrained optimization problem, and solving the constrained optimization problem using a method of multipliers to create a sequence of sub-problems and solve the sequence of sub-problems. Solving the sequence of sub-prob…

    Date Issued:
    2014-11-11
    Resource Type
    Patent
  • Inventor(s):
    Berardi Sensale-Rodriguez, Huili (Grace) Xing, Rusen Yan, Michelle M. Kelly, Tian Fang, Debdeep Jena, Lei Liu
    Patent Number:
    US 8836446 B2
    Description:

    A wave amplitude modulator for modulating a transmitted electromagnetic wave includes one or multiple self-gated capacitively coupled pair(s) of electron layers such as semiconductor or semimetal layers. Two electrical contacts are placed to each layer of electrons of the self-gated pair(s), and a power source is electrically connected to them. The power source, by varying the voltage applied between layers of electrons, tunes the electron density thereof, thereby adjusting the optical conduc…

    Date Issued:
    2014-09-16
    Resource Type
    Patent
  • Inventor(s):
    Zhou Yu, Evgeny Drapkin, Bruno Kristiaan Bernard De Man, Jean-Baptiste Thibault, Kai Zeng, Jiang Hsieh, Brian E. Nett, Debashish Pal, Lin Fu, Guangzhi Cao, Charles A. Bouman, Ken D. Sauer
    Patent Number:
    US 9020230 B2
    Description:

    A method for reconstructing an image of an object that includes a plurality of image elements. The method includes accessing image data associated with a plurality of image elements, and reconstructing an image of the object by optimizing an objective function, where the objective function is optimized by iteratively solving a nested sequence of approximate optimization problems. The algorithm is composed of nested iterative loops, in which an inner loop iteratively optimizes an objective fun…

    Date Issued:
    2015-04-28
    Resource Type
    Patent
  • Inventor(s):
    Behnam Sedighi, Michael Niemier, Xiaobo Sharon Hu, Joseph J. Nahas
    Patent Number:
    US 9362919 B1
    Description:

    A Boolean gate includes at least one symmetric tunneling field-effect transistor (SymFET) for low-power information processing. SymFETs are ideal for applications that demand low power and have moderate speed requirements, and demonstrate better dynamic energy efficiency than CMOS circuits. Negative differential resistance (NDR) behavior of SymFETs leads to hysteresis in inverters and buffers, and can be used to build simple Schmitt-triggers. Further, pseudo-SymFET loads may be utilized in ci…

    Date Issued:
    2016-06-07
    Resource Type
    Patent
  • Inventor(s):
    Jean-Baptiste Thibault, Xue Rui, Somesh Srivastava, Ken D. Sauer, Lin Fu, Charles A. Bouman
    Patent Number:
    US 9261467 B2
    Description:

    A system and method include acquisition of projection data from a scanned object, the set of projection data comprising a plurality of projection measurements. The system and method also include calculation of a set of modified statistical weights from the projection data, wherein a respective modified statistical weight of the set of modified statistical weights comprises a deviation from an inverse variance of a corresponding projection measurement of the projection data. The system and met…

    Date Issued:
    2016-02-16
    Resource Type
    Patent
  • Inventor(s):
    Wolfgang Porod, Gary H. Bernstein, Alexei Orlov, Gergo P. Szakmany
    Patent Number:
    US 9577173 B2
    Description:

    Nanoscale thermocouples are made of a single material and are shape-engineered to contain one or more variations in their width along their length. The mono-metallic nanowire junctions resulting from the width variation(s) exploit a difference in the Seebeck coefficient that is present at these size scales. Such devices have a wide variety of uses and can be coupled with an antenna in order to serve as an infrared detector.

    Date Issued:
    2017-02-21
    Resource Type
    Patent
  • Inventor(s):
    Douglas C. Hall, Scott Howard, Anthony Hoffman, Gary H. Bernstein, Jason M. Kulick
    Patent Number:
    US 9620473 B1
    Description:

    First and second integrated devices each have an optical component and a plurality of interconnect structures disposed one edge thereon. The first edge surface of the second integrated device is positioned contiguous to the first edge surface of the first integrated device. The interconnect structures disposed on the first integrated device are in physical contact with the interconnect structures disposed on the edge surface of the second integrated device so as to provide alignment for conve…

    Resource Type
    Patent
  • Inventor(s):
    J. Nicholas Laneman, Zhanwei Sun, Glenn Bradford
    Patent Number:
    US 8838520 B2
    Description:

    In one embodiment, a cognitive radio dynamic spectrum access sensing system is configured to incorporate a hidden Markov model and a risk function to determine the primary user state sequence with the minimum amount of associated risk. The system comprises one or more weighted cost factors that can be used to handle a missed detection sensing error differently from a false alarm sensing error. The system further comprises a complete forward partial backward computation designed to increase se…

    Date Issued:
    2014-09-16
    Resource Type
    Patent
  • Inventor(s):
    Alan C. Seabaugh, Patrick Fay, Huili (Grace) Xing, Guangle Zhou, Yeqing Lu, Mark A. Wistey, Siyuranga Koswatta
    Patent Number:
    US 8796733 B2
    Description:

    A low voltage tunnel field effect transistor includes a p-n tunnel junction, a gate-dielectric, a gate, a source-contact, and a drain-contact. The p-n tunnel junction includes a depletion region interfacing together a source-layer and a drain-layer. The depletion region includes a source-tunneling-region of the source-layer and a drain-tunneling-region of the drain-layer. When no external electric field is imposed, the depletion region of the p-n tunnel junction has an internal electric field…

    Date Issued:
    2014-08-05
    Resource Type
    Patent
  • Inventor(s):
    Jean-Baptiste Thibault, Bruno Kristiaan Bernard De Man, Kai Zeng, Zhou Yu, Charles A. Bouman, Ken D. Sauer
    Patent Number:
    US 8787521 B2
    Description:

    A system and method include acquisition of a set of image data corresponding to a time period of data acquisition, the set of image data corresponding to a plurality of voxels, wherein each of the plurality of voxels corresponds to a distinct acquisition time within the time period of data acquisition. The system and method further include the modeling of the plurality of voxels as a function of time based on a plurality of kinetic parameters associated therewith and reconstruction of an imag…

    Date Issued:
    2014-07-22
    Resource Type
    Patent
  • Inventor(s):
    Thomas G. Pratt
    Patent Number:
    US 9037414 B1
    Description:

    A system and method of identifying changes utilizing radio frequency polarization includes receiving a reflected and/or transmitted polarized radio frequency signal at a receiver, filtering, amplifying and conditioning the received signal, converting the received signal from an analog format to a digital format, processing the digital signal to elicit a polarization mode dispersion feature of the received signal, and comparing the polarization mode dispersion features to a known calibration t…

    Date Issued:
    2015-05-19
    Resource Type
    Patent