Patents by Inventor Wang Yanbo

Wang Yanbo 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).

  • Output slew rate control in low voltage differential signal (LVDS) driver
    Patent number: 7843235
    Abstract: A differential signal driver includes a pre-driver configured to generate a constant charging current and a constant discharging current. A first capacitor of the pre-driver is charged with the charging current when a differential input signal has a first state, and discharged with the discharging current when the differential input signal has a second state, thereby developing a first output control voltage on the first capacitor. A second capacitor of the pre-driver is discharged with the discharging charging current when the differential input signal has the first state, and charged with the charging current when the differential input signal has the second state, thereby developing a second output control voltage on the second capacitor. An output driver circuit generates a differential output signal in response to the first and second output control voltages. The slew rate of the differential output signal is controlled by the charging and discharging currents.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: November 30, 2010
    Assignee: Integrated Device Technology, Inc.
    Inventors: Wang Yanbo, Tao Li
  • Output Slew Rate Control In Low Voltage Differential Signal (LVDS) Driver
    Publication number: 20080129349
    Abstract: A differential signal driver includes a pre-driver configured to generate a constant charging current and a constant discharging current. A first capacitor of the pre-driver is charged with the charging current when a differential input signal has a first state, and discharged with the discharging current when the differential input signal has a second state, thereby developing a first output control voltage on the first capacitor. A second capacitor of the pre-driver is discharged with the discharging charging current when the differential input signal has the first state, and charged with the charging current when the differential input signal has the second state, thereby developing a second output control voltage on the second capacitor. An output driver circuit generates a differential output signal in response to the first and second output control voltages. The slew rate of the differential output signal is controlled by the charging and discharging currents.
    Type: Application
    Filed: November 30, 2007
    Publication date: June 5, 2008
    Applicant: INTEGRATED DEVICE TECHNOLOGY, INC.
    Inventors: Wang Yanbo, Tao Li