Patents by Inventor Choon F. Khoo

Choon F. Khoo 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).

  • Circuit for ground fault detection and switching
    Patent number: 5508872
    Abstract: A circuit for sensing the loss of a signal ground in an automotive electronic system having a source of electrical power and both a signal ground and a power ground, includes a first sensor coupled to the power ground and between the signal ground and the source of electrical power for generating a first signal responsive to the voltage on the signal ground differing from the voltage on the power ground by more than a first predetermined limit. A latching semiconductor switch is coupled to the first sensor and between the signal ground and the power ground for latching the electrical coupling of the signal ground to the power ground responsive to receiving the first signal.
    Type: Grant
    Filed: January 24, 1994
    Date of Patent: April 16, 1996
    Assignee: Ford Motor Company
    Inventors: Choon F. Khoo, Bor-Dong Chen, Viren B. Merchant, Aaron R. Tweadey