Patents by Inventor Kie-Moon Song

Kie-Moon Song 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: 5821812
    Abstract: In a wideband amplifier whose bandwidth is increased using a parallel feedback transistors(PFT), capacitive elements are connected between the first and seventh nodes which are emitters of the seventh and eighth transistors which are parallel feedback transistors, and alternating current(AC) grounds, wherein outputs are supplied from the first and seventh nodes, and the emitter follower buffers are coupled to the first and seventh nodes so that a negative feedback current is leaked through the collector parasitic capacitances of emitter follower buffer transistors. The bandwidth of the amplifier is greatly increased without making the circuit complex.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: October 13, 1998
    Assignees: Korea Telecommunication Authority, Electronics and Telecommunications Research Institute
    Inventors: Moon-Pyung Park, Hyeon-Cheol Ki, Sung-Ho Park, Tae-Woo Lee, Kie-Moon Song