Patents by Inventor Ruei-Je Tsai

Ruei-Je Tsai 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).

  • Patent number: 7848174
    Abstract: A word-line tracking system for a memory array having a plurality of memory cells, the word-line tracking system comprises a dummy row having substantially identical structure as one or more regular rows of the memory cells, the dummy row including a dummy word-line having a first and a second end at the opposite longitudinal ends of the dummy word-line, the first end being connected to a word-line driver, a self timing generator configured to receive a clock signal and generate a pulse signal in sync with the clock signal for the dummy word-line driver, the self timing generator having a first terminal for receiving a feedback signal to determine the falling edge of the pulse signal, a voltage-to-current converter connected to the second end of the dummy word-line, a current-to-voltage converter connected to the feedback terminal, and a wire connecting the voltage-to-current converter to the current-to-voltage converter.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: December 7, 2010
    Assignee: Taiwan Semiconductor Manufacturing Co, Ltd.
    Inventors: Hong-Chen Cheng, Hung-Jen Liao, Cheng Hung Lee, Ruei-Je Tsai
  • Publication number: 20090290446
    Abstract: A word-line tracking system for a memory array having a plurality of memory cells, the word-line tracking system comprises a dummy row having substantially identical structure as one or more regular rows of the memory cells, the dummy row including a dummy word-line having a first and a second end at the opposite longitudinal ends of the dummy word-line, the first end being connected to a word-line driver, a self timing generator configured to receive a clock signal and generate a pulse signal in sync with the clock signal for the dummy word-line driver, the self timing generator having a first terminal for receiving a feedback signal to determine the falling edge of the pulse signal, a voltage-to-current converter connected to the second end of the dummy word-line, a current-to-voltage converter connected to the feedback terminal, and a wire connecting the voltage-to-current converter to the current-to-voltage converter.
    Type: Application
    Filed: May 23, 2008
    Publication date: November 26, 2009
    Inventors: Hong-Chen Cheng, Hung-Jen Liao, Cheng Hung Lee, Ruei-Je Tsai