Patents by Inventor Amy R. Lundberg

Amy R. Lundberg 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).

  • Disk drive calibrating touchdown sensor
    Patent number: 8941941
    Abstract: A disk drive is disclosed comprising a head actuated over a disk, the head comprising a touchdown sensor. A bias signal is applied at a first bias value to the touchdown sensor and a corresponding first resistance of the touchdown sensor is measured. The bias signal is applied at a second bias value to the touchdown sensor and a corresponding second resistance of the touchdown sensor is measured. A reference resistance of the touchdown sensor is estimated based on the first and second bias values and the first and second resistances. An operating bias value is generated for the bias signal based on a predetermined operating temperature of the touchdown sensor, the reference resistance, and a thermal coefficient of resistance (TCR) of the touchdown sensor, wherein the TCR specifies a change in temperature of the touchdown sensor relative to a change in the resistance of the touchdown sensor.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: January 27, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventors: Dennis W. Hogg, Amy R. Lundberg