Patents by Inventor He Qing

He Qing 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).

  • GATED CLASS H AMPLIFIER/LINE DRIVER SYSTEM AND METHOD
    Publication number: 20120146725
    Abstract: Amplifier circuitry (10) includes a driver amplifier (11) and an integrator amplifier (AH) producing an output signal (VAH) that controls a pass transistor (Q2) coupled to a pump capacitor (CH). Input circuitry (16) controls the direction of ramping of the output signal during a first interval to boost a supply voltage (V12) of the driver amplifier via the pump capacitor, and also controls the direction of ramping to recharge the pump capacitor following a second interval. In one embodiment, pump capacitor recharging circuitry (Q75,R76,ICHH) completes the recharging of the pump capacitor following the second interval after it has been partially recharged by the integrator amplifier.
    Type: Application
    Filed: December 13, 2010
    Publication date: June 14, 2012
    Inventors: Paul G. Damitio, Xavier P. Ramus, He Qing
  • Gated class H amplifier/line driver system and method
    Patent number: 8188790
    Abstract: Amplifier circuitry (10) includes a driver amplifier (11) and an integrator amplifier (AH) producing an output signal (VAH) that controls a pass transistor (Q2) coupled to a pump capacitor (CH). Input circuitry (16) controls the direction of ramping of the output signal during a first interval to boost a supply voltage (V12) of the driver amplifier via the pump capacitor, and also controls the direction of ramping to recharge the pump capacitor following a second interval. In one embodiment, pump capacitor recharging circuitry (Q75,R76,ICCH) completes the recharging of the pump capacitor following the second interval after it has been partially recharged by the integrator amplifier.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: May 29, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Paul G. Damitio, Xavier P. Ramus, He Qing