Patents by Inventor Khai Sheng Ng

Khai Sheng Ng 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).

  • Abnormal magnetoresistive element detection for a disc drive
    Patent number: 6822815
    Abstract: A magnetoresistive element measurement circuit configured for measuring resistance of a magnetoresistive element biased by a current source is disclosed. In a preferred embodiment, the measurement circuit includes the magnetoresistive element, a current source providing a fixed current to the magnetoresistive element, at least one current bypass switch controllingly engaging a measurement resistor in an electrical parallel configuration with the biased magnetoresistive element, and an analogue voltage detector measuring voltage first across the biased magnetoresistive element and then across the biased magnetoresistive element in electrical parallel communication with the measurement resistor. The measured voltages are factored with the measurement resistor to determine the resistance of the magnetoresistive element.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: November 23, 2004
    Assignee: Seagate Technology LLC
    Inventors: Eng Hock Lim, Khai Sheng Ng, Fong Kheon Chong, Chew Weng Khin Victor, Myint Ngwe
  • Abnormal magnetoresistive element detection for a disc drive
    Publication number: 20030169528
    Abstract: A magnetoresistive element measurement circuit configured for measuring resistance of a magnetoresistive element biased by a current source is disclosed. In a preferred embodiment, the measurement circuit includes the magnetoresistive element, a current source providing a fixed current to the magnetoresistive element, at least one current bypass switch controllingly engaging a measurement resistor in an electrical parallel configuration with the biased magnetoresistive element, and an analogue voltage detector measuring voltage first across the biased magnetoresistive element and then across the biased magnetoresistive element in electrical parallel communication with the measurement resistor. The measured voltages are factored with the measurement resistor to determine the resistance of the magnetoresistive element.
    Type: Application
    Filed: June 28, 2002
    Publication date: September 11, 2003
    Applicant: Seagate Technology LLC
    Inventors: Eng Hock Lim, Khai Sheng Ng, Fong Kheon Chong, Chew Weng Khin Victor, Myint Ngwe