Patents by Inventor Karen S. Schmoll

Karen S. Schmoll 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).

  • Digital tone detector
    Patent number: 5274579
    Abstract: A digital tone detector utilizes pseudo sinusoidal quadrature reference signals in combination with a unique summation rule for summing the resultant quadrature accumulations to obtain a substantial improvement in the sidelobe responses of the filter. The digital tone detector also utilizes a "stepped" observation window to further provide a substantial improvement in the third harmonic response of the filter. The digital tone detector can be implemented using a hardware implementation, a combination hardware and microprocessor implementation, and a microprocessor only implementation.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: December 28, 1993
    Assignee: Motorola, Inc.
    Inventors: Leonard E. Nelson, Karen S. Schmoll