Patents by Inventor Sun-Kyu CHOL

Sun-Kyu CHOL 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).

  • RTD-HBT DIFFERENTIAL OSCILLATOR TOPOLOGY
    Publication number: 20080042762
    Abstract: The new RTD-HBT differential oscillator circuit topology is proposed. At the nodes of the inductors and varactors in the conventional differential oscillator topology, each the RTD is attached to increase the magnitude of the negative conductance, which results in performance improvement in both the RF output power and phase noise. And, the differential sinusoidal voltage waveform which is essential for the wireless communication system are generated. In addition, the DC power consumption RTD-HBT differential oscillator circuit is similar to the conventional HBT differential oscillator due to the small DC power consumption performance of the RTD.
    Type: Application
    Filed: August 10, 2006
    Publication date: February 21, 2008
    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Kyoung-Hoon YANG, Sun-Kyu CHOL