Patents by Inventor Chang-yeol Seong

Chang-yeol Seong 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).

  • TV signal receiving double conversion television tuner system having automatic gain control provisions
    Patent number: 5200826
    Abstract: A TV signal receiving system, in order to tune a broadcasting frequency of a desired channel after receiving a TV signal, converts the TV signal into an intermediate frequency having a frequency higher than the maximum frequency in a TV broadcasting frequency band and then converts again the frequency of the signal into another intermediate frequency in conventional TV systems so as to improve the rejection characteristics of image and IF signals. The system comprises a first converter for tracking a desired channel frequency from a TV RF signal and converting the frequency into a first IF of 2 GHz, a band-pass filter of the 2 GHz IF for filtering only the first IF frequency signal in the first converter, and a second converter for converting the filtered first IF into 45 MHz of the conventional TV IF.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: April 6, 1993
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Chang-yeol Seong