Patents by Inventor Xiaoyu (Frank) Xi

Xiaoyu (Frank) Xi 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 generating a reference voltage
    Patent number: 7372242
    Abstract: Systems and methods for generating a reference voltage are disclosed. In one embodiment, an output voltage is generated that is the sum of a desirable reference voltage component and an undesirable voltage component. An additional voltage component that tends to be equal and opposite in sign to the undesirable voltage component is added to the output voltage, the additional voltage component thereby tending to cancel the undesirable voltage component.
    Type: Grant
    Filed: December 23, 2004
    Date of Patent: May 13, 2008
    Assignee: Silicon Laboratories, Inc.
    Inventor: Xiaoyu Frank Xi
  • Miller compensated NMOS low drop-out voltage regulator using variable gain stage
    Patent number: 6600299
    Abstract: A high power supply ripple rejection (PSRR) internally compensated low drop-out voltage regulator using an output NMOS pass device. The voltage regulator uses an inverting inter-stage variable gain amplifier to adjust its gain in response to a load current passing through the output NMOS device such that as the load current decreases, the gain increases, wherein a second pole associated with the voltage regulator is pushed above a unity gain frequency associated with the voltage regulator. The inverting inter-stage variable gain amplifier is further operational to adjust its gain in response to a load current passing through the power NMOS device such that as the load current increases, the gain decreases, wherein the unity gain bandwidth associated with the loop formed by a compensation capacitor is kept substantially constant.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: July 29, 2003
    Assignee: Texas Instruments Incorporated
    Inventor: Xiaoyu (Frank) Xi
  • MILLER COMPENSATED NMOS LOW DROP-OUT VOLTAGE REGULATOR USING VARIABLE GAIN STAGE
    Publication number: 20030111986
    Abstract: A high power supply ripple rejection (PSRR) internally compensated low drop-out voltage regulator using an output NMOS pass device. The voltage regulator uses an inverting inter-stage variable gain amplifier to adjust its gain in response to a load current passing through the output NMOS device such that as the load current decreases, the gain increases, wherein a second pole associated with the voltage regulator is pushed above a unity gain frequency associated with the voltage regulator. The inverting inter-stage variable gain amplifier is further operational to adjust its gain in response to a load current passing through the power NMOS device such that as the load current increases, the gain decreases, wherein the unity gain bandwidth associated with the loop formed by a compensation capacitor is kept substantially constant.
    Type: Application
    Filed: December 19, 2001
    Publication date: June 19, 2003
    Inventor: Xiaoyu (Frank) Xi