Patents by Inventor Kai-Chen Kuo

Kai-Chen Kuo 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: 12218230
    Abstract: A p-GaN high-electron-mobility transistor, includes a substrate, a channel layer stacked on the substrate, a supply layer stacked on the channel layer, a first doped layer stacked on the supply layer, a second doped layer stacked on the first doped layer, and a third doped layer stacked on the second doped layer. A doping concentration of the first doped layer and the doping concentration of the third doped layer are lower than a doping concentration of the second doped layer. A gate is located on the third doped layer, and a source and a drain are electrically connected to the channel layer and the supply layer, respectively.
    Type: Grant
    Filed: July 19, 2022
    Date of Patent: February 4, 2025
    Assignee: NATIONAL SUN YAT-SEN UNIVERSITY
    Inventors: Ting-Chang Chang, Mao-Chou Tai, Yu-Xuan Wang, Wei-Chen Huang, Ting-Tzu Kuo, Kai-Chun Chang, Shih-Kai Lin
  • Patent number: 8436581
    Abstract: A system for testing electromagnetic characteristics of an electromagnetic steel sheet includes: a driving unit operable based on a non-sinusoidal wave control signal from a control unit and a floating voltage to output a control output; a power output unit operable based on the control output from the driving unit to output a voltage output at an output side coupled across a first winding wound around the electromagnetic steel sheet such that an exciting current flowing through the first winding is generated in response to the voltage output, thereby resulting in an induced voltage across a second winding wound around the electromagnetic steel sheet; and a measuring unit outputting to the control unit an output corresponding to the exciting current and the induced voltage measured thereby such that the control unit obtains the electromagnetic characteristics of the electromagnetic steel sheet based on the output.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: May 7, 2013
    Assignee: China Steel Corporation
    Inventors: Kai-Chen Kuo, Jia-Yush Yen, Ping-Kun Lee, Yi-Chih Lai, Cheng-Ju Wu
  • Publication number: 20100283569
    Abstract: An electromagnetic winding assembly includes first and second housing halves and first and second conductive units provided on the first and second housing halves, respectively. The first and second housing halves are detachably connected to each other so as to define cooperatively a core-receiving space therebetween and to connect electrically the first conductive unit with the second conductive unit such that the first conductive unit cooperates with the second conductive unit to form at least one coil-like electrical conductor configured to be wound around a core received in the core-receiving space.
    Type: Application
    Filed: May 6, 2009
    Publication date: November 11, 2010
    Inventors: Ping-Kun LEE, Jia-Yush YEN, Kai-Chen KUO, Yi-Chih LAI, Cheng-Ju WU
  • Publication number: 20100264911
    Abstract: A system for testing electromagnetic characteristics of an electromagnetic steel sheet includes: a driving unit operable based on a non-sinusoidal wave control signal from a control unit and a floating voltage to output a control output; a power output unit operable based on the control output from the driving unit to output a voltage output at an output side coupled across a first winding wound around the electromagnetic steel sheet such that an exciting current flowing through the first winding is generated in response to the voltage output, thereby resulting in an induced voltage across a second winding wound around the electromagnetic steel sheet; and a measuring unit outputting to the control unit an output corresponding to the exciting current and the induced voltage measured thereby such that the control unit obtains the electromagnetic characteristics of the electromagnetic steel sheet based on the output.
    Type: Application
    Filed: April 19, 2010
    Publication date: October 21, 2010
    Applicant: China Steel Corporation
    Inventors: Kai-Chen Kuo, Jia-Yush Yen, Ping-Kun Lee, Yi-Chih Lai, Cheng-Ju Wu