Patents by Inventor David S. Ma

David S. Ma 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).

  • System and method for monitoring internal voltages on an integrated circuit
    Patent number: 6845048
    Abstract: A system and method for monitoring internal voltage sources in an integrated circuit, such as a DRAM integrated circuit, includes an internal analog multiplexing circuit, an internal analog-to-digital converter, and an interface circuit. Through the analog multiplexing circuit, the analog-to-digital converter sequentially connects to each voltage source and converts the measured voltage level of the source to a binary word. The interface circuit presents the binary word, e.g., serially, to test equipment off the integrated circuit.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: January 18, 2005
    Assignee: Infineon Technologies AG
    Inventors: George W. Alexander, Jennifer F. Huckaby, Steven M. Baker, David S. Ma
  • System and method for monitoring internal voltages on an integrated circuit
    Publication number: 20040057289
    Abstract: A system and method for monitoring internal voltage sources in an integrated circuit, such as a DRAM integrated circuit, includes an internal analog multiplexing circuit, an internal analog-to-digital converter, and an interface circuit. Through the analog multiplexing circuit, the analog-to-digital converter sequentially connects to each voltage source and converts the measured voltage level of the source to a binary word. The interface circuit presents the binary word, e.g., serially, to test equipment off the integrated circuit.
    Type: Application
    Filed: September 25, 2002
    Publication date: March 25, 2004
    Applicant: Infineon Technologies North America Corp.
    Inventors: George W. Alexander, Jennifer F. Huckaby, Steven M. Baker, David S. Ma