Patents by Inventor Lezlie A. Hughes

Lezlie A. Hughes 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).

  • Method and apparatus for testing a magnetic head
    Patent number: 6512367
    Abstract: This invention presents a method and system for testing a disc drive head usable with a disc drive head testing device. The steps for this include determining an unknown electrical property of the head testing device. This is done by generating output signals at the output stage. The testing device property is then computed by solving for the unknown electrical property based on the output signals generated for each of the known test devices. For each disc drive head under test, the head is coupled to the input lead and exposed to a stored magnetic data pattern to generate a read signal at the input lead. The measured difference affects the generated read output signal. The read output signal is adjusted based on the testing device property and the measured property to compensate for differences in the measured property.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: January 28, 2003
    Assignee: Seagate Technology LLC
    Inventors: Hua Liu, Timothy A. Madsen, Alex C. Toy, Lezlie A. Hughes
  • Method and apparatus for testing a magnetic head
    Publication number: 20020041183
    Abstract: This invention presents a method and system for testing a disc drive head usable with a disc drive head testing device. The steps for this include determining an unknown electrical property of the head testing device. This is done by generating output signals at the output stage. The testing device property is then computed by solving for the unknown electrical property based on the output signals generated for each of the known test devices. For each disc drive head under test, the head is coupled to the input lead and exposed to a stored magnetic data pattern to generate a read signal at the input lead. The measured difference affects the generated read output signal. The read output signal is adjusted based on the testing device property and the measured property to compensate for differences in the measured property.
    Type: Application
    Filed: February 2, 2001
    Publication date: April 11, 2002
    Inventors: Hua Liu, Timothy A. Madsen, Alex C. Toy, Lezlie A. Hughes