Patents by Inventor Sean Ian Saxon Liw

Sean Ian Saxon Liw 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).

  • Patent number: 7352262
    Abstract: A cancellation circuit to remove the anti-resonance signal from a resonator. Micro-mechanical and surface and bulk acoustic wave resonators include an anti-resonance in an output signal. This has an undesirable effect on certain types of systems in their function and performance. An anti-resonance cancellation circuit removes the anti-resonance from the output of the resonators by providing a signal which is subtracted from the output of the resonator. The cancellation circuit includes a capacitor which is matched to the static capacitance of the resonator. The loads of the resonator and cancellation network are also matched.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: April 1, 2008
    Inventors: Yong Ping Xu, Wai Hoong Sun, Xiaofeng Wang, Zhe Wang, Sean Ian Saxon Liw
  • Patent number: 7095297
    Abstract: A cancellation circuit to remove the anti-resonance signal from a resonator. Micro-mechanical and surface and bulk acoustic wave resonators include an anti-resonance in an output signal. This has an undesirable effect on certain types of systems in their function and performance. An anti-resonance cancellation circuit removes the anti-resonance from the output of the resonators by providing a signal which is subtracted from the output of the resonator. The cancellation circuit includes a capacitor which is matched to the static capacitance of the resonator. The loads of the resonator and cancellation network are also matched.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: August 22, 2006
    Assignee: National University of Singapore
    Inventors: Yong Ping Xu, Wai Hoong Sun, Xiaofeng Wang, Zhe Wang, Sean Ian Saxon Liw
  • Publication number: 20030148733
    Abstract: A cancellation circuit to remove the anti-resonance signal from a resonator. Micro-mechanical and surface and bulk acoustic wave resonators include an anti-resonance in an output signal. This has an undesirable effect on certain types of systems in their function and performance. An anti-resonance cancellation circuit removes the anti-resonance from the output of the resonators by providing a signal which is subtracted from the output of the resonator. The cancellation circuit includes a capacitor which is matched to the static capacitance of the resonator. The loads of the resonator and cancellation network are also matched.
    Type: Application
    Filed: November 12, 2002
    Publication date: August 7, 2003
    Inventors: Yong Ping Xu, Wai Hoong Sun, Xiaofeng Wang, Zhe Wang, Sean Ian Saxon Liw