Patents by Inventor Geng Xia

Geng Xia 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).

  • Multiplexed analog-to-digital converter for relative and absolute voltage measurements
    Patent number: 5736949
    Abstract: A multiplexed analog-to-digital converter to accept multiple dissimilar analog input signals and convert each analog input signal to a digital code that represents the ratio of the magnitude of the analog input signal to the difference of an upper reference voltage source and a lower reference voltage source is disclosed. The upper reference voltage source is selected by an analog multiplexer from a set of voltage reference sources that include the power supply voltage source of the analog-to-digital converter for analog input signals that are reference to the power supply voltage source, and a precision reference voltage source that is referenced to the band-gap of silicon to provide an absolute measurement of the analog input signal. The lower reference voltage source is selected by a multiplexer from such references as a ground reference source.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: April 7, 1998
    Assignee: Tritech Microelectronics International Pte, Ltd.
    Inventors: Eng Yue Ong, Alvin Liw Sioee Hock, Geng Xia