Patents by Inventor Paul E. Schurr

Paul E. Schurr 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).

  • Multimode digital modem
    Patent number: 6055268
    Abstract: A modem communication system with receiving and transmission paths includes a direct equalizer system having an adaptive filter (1532) in the transmission path to compensate for frequency distortion of the communication channel. The transmitter filter coefficients are adapted by a filter coefficient calculator (1528), under control of a data detector (1526) which detects incoming data in the receiving path. A switch (1534) is controlled by status of a transmit output data buffer to multiplex either the training sequence or output data into the transmission path. When the buffer is idle, the training sequence generator (1540) is linked to a digital-to-analog (D/A) converter (1536) and line driver (1538). The receiving path includes an isolation switch (1520), a receiver amplifier (1522) and a slicer (1524). The receiver correlates the received training sequence with a known training sequence and updates the equalizer filter coefficients using an adaptation algorithm, such as a least mean squared algorithm.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: April 25, 2000
    Assignee: Texas Instruments Incorporated
    Inventors: William C. Timm, Walter Y. Chen, Gene A. Frantz, Domingo G. Garcia, Xiaolin Lu, Dennis G. Mannering, Michael O. Polley, Terence J. Riley, Donald P. Shaver, Song Wu, Alan Gatherer, Paul E. Schurr, Douglas B. Weiner
  • Hybrid wireless wire-line network integration and management
    Patent number: 6021158
    Abstract: A modem that operates selectively in the voice-band frequency band and at higher frequency bands is provided. This modem supports multiple line codes, like DMT and CAP. The modem uses a Digital Signal Processor (DSP), so that different existing ADSL line codes, such as Discrete MultiTone (DMT) and Carrierless AM/PM (CAP), can be implemented on the same hardware platform. The modem negotiates in real-time, for a desired line transmission rate to accommodate line condition and service-cost requirement. The line code and rate negotiation process may be implemented at the beginning of each communication session through the exchange of tones between the modems. A four-step MDSL modem initialization process is provided for line code and rate compatibility.
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: February 1, 2000
    Assignee: Texas Instruments Incorporated
    Inventors: Paul E. Schurr, Walter Y. Chen, Douglas B. Weiner
  • Treatment of atherosclerosis with khellin-related furochromones
    Patent number: 4399146
    Abstract: The present specification relates to the antiatherosclerotic use of khellin and related furochromones, and further provides novel antiatherogenic furochromones.
    Type: Grant
    Filed: January 28, 1980
    Date of Patent: August 16, 1983
    Assignee: The Upjohn Company
    Inventors: Paul E. Schurr, Charles E. Day
  • Antiatherosclerotic use of khellin and khellinin
    Patent number: 4281013
    Abstract: The present specification relates to the antiatherosclerotic use of khellin and related furochromones, and further provides novel antiatherogenic 6-halofurochromones.
    Type: Grant
    Filed: February 13, 1979
    Date of Patent: July 28, 1981
    Assignee: The Upjohn Company
    Inventors: Paul E. Schurr, Charles E. Day