Patents by Inventor CheeWee Cheng

CheeWee Cheng 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).

  • In Situ Sensor Based Contact Detection
    Publication number: 20140268406
    Abstract: Apparatus and method for positional sensing and control. In accordance with some embodiments, a transducer is positioned adjacent a recording medium. The transducer includes a write element, a read element, a heater and a thermally responsive sensor. Power is applied to the heater to establish a selected fly height of the transducer relative to the medium. A contact event between the transducer and the medium is detected responsive to an accumulated plural count of pulses in a bias signal obtained from the thermally responsive sensor.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: CheeWee Cheng, Subhash Guddati, ShengYuan Lin, Andy Chou, SweeChuan Samuel Gan, Stefan Ionescu, Scott Ryun, Richard Martin, Jesse Speckhard
  • In situ sensor based contact detection
    Patent number: 8837076
    Abstract: Apparatus and method for positional sensing and control. In accordance with some embodiments, a transducer is positioned adjacent a recording medium. The transducer includes a write element, a read element, a heater and a thermally responsive sensor. Power is applied to the heater to establish a selected fly height of the transducer relative to the medium. A contact event between the transducer and the medium is detected responsive to an accumulated plural count of pulses in a bias signal obtained from the thermally responsive sensor.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: September 16, 2014
    Assignee: Seagate Technology LLC
    Inventors: CheeWee Cheng, Subhash Guddati, ShengYuan Lin, Andy Chou, SweeChuan Samuel Gan, Stefan Ionescu, Scott Ryun, Richard Martin, Jesse Speckhard
  • Power management in an information channel
    Patent number: 7600136
    Abstract: Methods and associated apparatus to reduce electrical power consumption in an information channel may include identifying times at which to restore power to elements in the information channel, and restoring power to the elements at the identified times. Times for each element are identified based on a recovery time for that element to reach a sufficiently stable operating point before a transition to an active mode of operation. By maximizing the length of time individual elements may stay in the reduced power mode, power savings may be maximized without negatively affecting information channel performance.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: October 6, 2009
    Assignee: Seagate Technology LLC
    Inventors: CheeWee Cheng, KianWai Ng, QuekLeong Choo, Myint Muang Ngwe, KahLiang Gan
  • Power management in an information channel
    Publication number: 20070043963
    Abstract: Methods and associated apparatus to reduce electrical power consumption in an information channel may include identifying times at which to restore power to elements in the information channel, and restoring power to the elements at the identified times. Times for each element are identified based on a recovery time for that element to reach a sufficiently stable operating point before a transition to an active mode of operation. By maximizing the length of time individual elements may stay in the reduced power mode, power savings may be maximized without negatively affecting information channel performance.
    Type: Application
    Filed: August 19, 2005
    Publication date: February 22, 2007
    Inventors: CheeWee Cheng, KianWai Ng, QuekLeong Choo, Myint Ngwe, KahLiang Gan