Patents by Inventor Jui-Chih Cheng

Jui-Chih Cheng 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).

  • Sigma-delta modulation inverter with programmable waveform output
    Patent number: 6937489
    Abstract: An inverter for converting a DC input voltage into an AC output voltage using the sigma-delta modulation (SDM) is provided which includes: a SDM controller for producing a modulated output voltage signal according to a reference voltage signal, a driving circuit electrically connected to the SDM controller for producing a driving signal according to the modulated output voltage signal, and a power inversion stage circuit electrically connected to the driving circuit for producing the AC output voltage according to the driving signal. A controller for producing a modulated output voltage signal according to a reference voltage signal is also provided which includes: an integrator circuit, a sample-and-hold circuit electrically connected to the integrator circuit, and a quantizer circuit electrically connected to the sample-and-hold circuit and electrically connected to an input terminal of the integrator circuit through an output terminal thereof.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: August 30, 2005
    Assignee: National Taiwan University of Science and Technology
    Inventors: Guan-Chyun Hsieh, Hung-Liang Chen, Jui-Chih Cheng
  • Sigma-delta modulation inverter with programmable waveform output
    Publication number: 20050073868
    Abstract: An inverter for converting a DC input voltage into an AC output voltage using the sigma-delta modulation (SDM) is provided which includes: a SDM controller for producing a modulated output voltage signal according to a reference voltage signal, a driving circuit electrically connected to the SDM controller for producing a driving signal according to the modulated output voltage signal, and a power inversion stage circuit electrically connected to the driving circuit for producing the AC output voltage according to the driving signal. A controller for producing a modulated output voltage signal according to a reference voltage signal is also provided which includes: an integrator circuit, a sample-and-hold circuit electrically connected to the integrator circuit, and a quantizer circuit electrically connected to the sample-and-hold circuit and electrically connected to an input terminal of the integrator circuit through an output terminal thereof.
    Type: Application
    Filed: October 7, 2003
    Publication date: April 7, 2005
    Applicant: National Taiwan University of Science and Technology
    Inventors: Guan-Chyun Hsieh, Hung-Liang Chen, Jui-Chih Cheng