Patents by Inventor Rita Au

Rita Au 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).

  • Analog semiconductor memory device having multiple-valued comparators and floating-gate transistor
    Patent number: 5684738
    Abstract: A semiconductor memory circuit which realizes a source follower having a voltage gain equal to one, a decrease in the time necessary for the source follower to reach its full output voltage. Furthermore, the multiple-valued or analog output voltage can be easily converted to a binary-digital form with this memory circuit. This semiconductor circuit comprises at least an MOS transistor. A multiple-valued or analog data line is connected to the inputs of multiple-valued comparators, the outputs of said comparators are coupled capacitively to the input gate of a source-follower circuit, and the output of said source-follower circuit is fed back to the data line.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: November 4, 1997
    Assignees: Tadashi Shibata, Tadahiro Ohmi
    Inventors: Rita Au, Tadashi Shibata, Tadahiro Ohmi