Patents by Inventor Triet Tieu

Triet Tieu 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).

  • Reducing noise in back EMF sensing for data storage
    Patent number: 11798587
    Abstract: Various illustrative aspects are directed to a data storage device comprising: a voice coil motor (VCM) and one or more processing devices, configured to actuate the VCM, switch on measuring a back electromotive force (BEMF) from the VCM for intervals of an initial BEMF measurement that are free of spikes in the initial BEMF measurement, and process a measured BEMF signal from the intervals of the initial BEMF measurement that are free of spikes in a change of current term of the initial BEMF measurement.
    Type: Grant
    Filed: March 14, 2022
    Date of Patent: October 24, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Guoxiao Guo, Jianbin Nie, Triet Tieu, Duc H. Banh, Tianyu Jiang
  • REDUCING NOISE IN BACK EMF SENSING FOR DATA STORAGE
    Publication number: 20230317107
    Abstract: Various illustrative aspects are directed to a data storage device comprising: a voice coil motor (VCM) and one or more processing devices, configured to actuate the VCM, switch on measuring a back electromotive force (BEMF) from the VCM for intervals of an initial BEMF measurement that are free of spikes in the initial BEMF measurement, and process a measured BEMF signal from the intervals of the initial BEMF measurement that are free of spikes in a change of current term of the initial BEMF measurement.
    Type: Application
    Filed: March 14, 2022
    Publication date: October 5, 2023
    Inventors: Guoxiao Guo, Jianbin Nie, Triet Tieu, Duc H. Banh, Tianyu Jiang
  • Methods and apparatus to reduce the stopping time of spindle motors
    Patent number: 8026680
    Abstract: Methods and apparatus to reduce the stopping time of a spindle motor are disclosed. An example method includes detecting a dissipation current flowing in a spinning motor; determining when the dissipation current drops below a threshold value; and, in response to the dissipation current dropping below the threshold value, applying a voltage to the motor to increase the dissipation current for a duration. In some examples, the voltage is removed from the motor when the motor reaches a predetermined rotational velocity to avoid reverse rotation.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: September 27, 2011
    Assignee: Texas Instruments Incorporated
    Inventor: Triet Tieu
  • METHODS AND APPARATUS TO REDUCE THE STOPPING TIME OF SPINDLE MOTORS
    Publication number: 20090243521
    Abstract: Methods and apparatus to reduce the stopping time of a spindle motor are disclosed. An example method includes detecting a dissipation current flowing in a spinning motor; determining when the dissipation current drops below a threshold value; and, in response to the dissipation current dropping below the threshold value, applying a voltage to the motor to increase the dissipation current for a duration. In some examples, the voltage is removed from the motor when the motor reaches a predetermined rotational velocity to avoid reverse rotation.
    Type: Application
    Filed: March 31, 2008
    Publication date: October 1, 2009
    Inventor: Triet Tieu