Patents by Inventor Zong Bo Hu

Zong Bo Hu 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).

  • Control circuits and methods for controlling switching devices
    Patent number: 9621020
    Abstract: A control circuit for controlling a switching device having a first terminal, a second terminal, and a control terminal is disclosed. The control circuit includes a first diode for coupling to the first terminal of the switching device, a second diode for coupling to the second terminal of the switching device, a first transistor for coupling to the control terminal of the switching device, and a second transistor coupled to the second diode. The first transistor is coupled to the first diode. The control circuit is configured to allow current flow in only one direction between the first and second terminals of the switching device.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: April 11, 2017
    Assignee: ASTEC INTERNATIONAL LIMITED
    Inventors: Zong Bo Hu, Ying Qu, Kevin Donald Wildash, Wai Kin Chan, Wing Ling Cheng
  • Control circuits and methods for controlling switching devices
    Patent number: 8207779
    Abstract: A control circuit for controlling a switching device having a first terminal, a second terminal, and a control terminal is disclosed. The control circuit includes a first diode for coupling to the first terminal of the switching device, a second diode for coupling to the second terminal of the switching device, a first transistor for coupling to the control terminal of the switching device, and a second transistor coupled to the second diode. The first transistor is coupled to the first diode. The control circuit is configured to allow current flow in only one direction between the first and second terminals of the switching device.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: June 26, 2012
    Assignee: Astec International Limited
    Inventors: Zong Bo Hu, Ying Qu, Kevin Donald Wildash, Wai Kin Chan, Wing Ling Cheng
  • CONTROL CIRCUITS AND METHODS FOR CONTROLLING SWITCHING DEVICES
    Publication number: 20090284302
    Abstract: A control circuit for controlling a switching device having a first terminal, a second terminal, and a control terminal is disclosed. The control circuit includes a first diode for coupling to the first terminal of the switching device, a second diode for coupling to the second terminal of the switching device, a first transistor for coupling to the control terminal of the switching device, and a second transistor coupled to the second diode. The first transistor is coupled to the first diode. The control circuit is configured to allow current flow in only one direction between the first and second terminals of the switching device.
    Type: Application
    Filed: May 16, 2008
    Publication date: November 19, 2009
    Inventors: Zong Bo Hu, Ying Qu, Kevin Donald Wildash, Wai Kin Chan, Wing Ling Cheng
  • CONTROL CIRCUITS AND METHODS FOR CONTROLLING SWITCHING DEVICES
    Publication number: 20090285001
    Abstract: A control circuit for controlling a switching device having a first terminal, a second terminal, and a control terminal is disclosed. The control circuit includes a first diode for coupling to the first terminal of the switching device, a second diode for coupling to the second terminal of the switching device, a first transistor for coupling to the control terminal of the switching device, and a second transistor coupled to the second diode. The first transistor is coupled to the first diode. The control circuit is configured to allow current flow in only one direction between the first and second terminals of the switching device.
    Type: Application
    Filed: May 16, 2008
    Publication date: November 19, 2009
    Inventors: Zong Bo Hu, Ying Qu, Kevin Donald Wildash, Wai Kin Chan, Wing Ling Cheng
  • CONTROL CIRCUITS AND METHODS FOR CONTROLLING SWITCHING DEVICES
    Publication number: 20090284303
    Abstract: An integrated circuit is disclosed. The integrated circuit includes first and second transistors, first and second diodes, a first pin connected to the first transistor, a second pin connected to the second transistor, a third pin connected to the first diode, and a fourth pin connected to the second diode.
    Type: Application
    Filed: May 16, 2008
    Publication date: November 19, 2009
    Inventors: Zong Bo Hu, Ying Qu, Kevin Donald Wildash, Wai Kin Chan, Wing Ling Cheng