Patents by Inventor Weiye Lu

Weiye Lu 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).

  • Method and system for reducing I/O noise and power
    Patent number: 7928756
    Abstract: In an I/O circuit, noise reduction and power savings are achieved by providing feedback from the output of the I/O driver to control the current through the pre-driver and thereby the current through the driver transistors after a non-zero time delay following a low to high or high to low data signal change.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: April 19, 2011
    Assignee: National Semiconductor Corporation
    Inventors: Weiye Lu, Elroy M. Lucero, Thomas Tse
  • I/O protection under over-voltage and back-drive conditions by single well charging
    Patent number: 7605619
    Abstract: In an I/O driver that includes a cascoded pair of PMOS driver transistors connected to a pair of cascaded NMOS driver transistors and that defines a pad output between the PMOS and NMOS driver transistors, a method of providing the CMOS I/O driver with over-voltage and back-drive protection includes providing circuitry for charging the wells of the PMOS transistors either to VDDIO during normal voltage mode by making use of the power supply, or to a common voltage during over-voltage and back-drive operation using the pad voltage.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: October 20, 2009
    Assignee: National Semiconductor Corporation
    Inventors: Weiye Lu, Elroy M. Lucero, Khusrow Kiani
  • Crystal oscillator circuit having a start-up time reduction circuit
    Patent number: 7034628
    Abstract: A quartz-crystal oscillator circuit substantially reduces the start-up time of the crystal oscillator circuit by utilizing a start-up time reduction circuit that adds additional gain to the crystal oscillator circuit during the start-up period, and removes the additional gain as the oscillator circuit nears steady state operation. Furthermore, the start-up time reduction circuit dynamically monitors the oscillation amplitude. If the build up of oscillation is interrupted, the additional gain will be re-applied.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: April 25, 2006
    Assignee: National Semiconductor Corporation
    Inventors: Weiye Lu, Thomas Tse, Wai Cheong Chan