Patents by Inventor Daniel V. Hulse

Daniel V. Hulse 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: 7348597
    Abstract: Various apparatus for performing high frequency electronic package testing are disclosed. A test fixture assembly includes an electronics package having an interface structure, a mock-up IC, coupled to the interface structure for providing circuit connections, and a fixture board, coupled to the interface structure, wherein at least one of the fixture board and mock-up IC includes high frequency probe pads for providing a signal and ground point for high bandwidth test probing. Raw measurements are used for validation of the electronic package specifications when adequate test fixture bandwidth is available or included into circuit simulations models when a minimal phase error is acceptable, else phase and loss corrections are applied to the measurements.
    Type: Grant
    Filed: March 14, 2005
    Date of Patent: March 25, 2008
    Assignee: Xilinx, Inc.
    Inventors: Michael J. Degerstrom, Matthew L. Bibee, Daniel V. Hulse
  • Patent number: 6297691
    Abstract: A receiver receives modulated message signals in non-coherent FSK and coherent 8PSK protocols. A selectively configurable processor demodulates the message signals, and includes a demodulator that derives in-phase and quadrature signals based on the message signals. A phase detector is responsive to the in-phase and quadrature signals and delayed in-phase and quadrature signals to derive a phase signal. A selector is responsive to the in-phase and quadrature signals to selectively connect a loop filter between the phase detector and the demodulator. When the selector connects the filter between the phase detector and demodulator, the demodulator is responsive to filtered phase signals to lock onto a frequency of the message signals so that the processor operates as a phase locked loop to demodulate coherent modulated signals.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: October 2, 2001
    Assignee: Rosemount Inc.
    Inventors: Stephen D. Anderson, Daniel V. Hulse, Kevin B. Moore, Paul D. Kammann, Gabriel A. Maalouf
  • Patent number: 6026170
    Abstract: An electronic stethoscope emulates the frequency response of a standard acoustical stethoscope in both bell and diaphragm modes, while providing additional features attainable only with an electronic stethoscope, such as signal amplification, noise reduction, wider bandwidth, and mode selection. The electronic stethoscope includes spectrally separate idealized diaphragm and idealized bell modes. The idealized diaphragm mode and the idealized bell mode each include emphasized passbands and de-emphasized passbands. The emphasized passbands are spectrally separate. In addition, the electronic stethoscope also includes a wideband mode, which permits the user to hear high frequency sounds such as those associated with mechanical heart valves, lung sounds, and the like.
    Type: Grant
    Filed: November 27, 1995
    Date of Patent: February 15, 2000
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Alan P. Dieken, Joel R. Dufresne, Daniel V. Hulse