Patents by Inventor Dae-hoon Kwon

Dae-hoon Kwon 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).

  • Publication number: 20070109925
    Abstract: An apparatus for generating tracking error signals including: an optical detection unit having a plurality of divided light receiving elements to allow beams reflected from a recording surface of the optical disks to be incident; a comparator for outputting after comparing the signals from light receiving elements, which correspond to the set group of the optical detection unit, with the reference signals set for the each group; an error correction unit for correcting and outputting errors if there are any errors after mutual comparison with signals of the groups output from the comparator; a phase-difference detection unit for outputting the signals for each group that correspond to a phase-difference after mutual comparison of the signals of the groups output from the error correction unit; a subtractor for mutually subtracting the signals for each group from the phase-difference detection unit and outputting the tracking error signals.
    Type: Application
    Filed: December 29, 2006
    Publication date: May 17, 2007
    Inventors: Dae-Hoon Kwon, Gae-ok Cho
  • Publication number: 20070040610
    Abstract: An automatic gain controller includes a variable gain amplifier for amplifying an input signal having a specified DC level on the basis of the DC level, and outputting a first differential signal having a specified gain ?, a second differential signal having a 180° phase difference from the first differential signal, and an output signal obtained by subtracting the second differential signal from the first differential signal; a full-wave-rectifying unit for full-wave-rectifying the first differential signal and the second differential signal; a low-pass filter for extracting the DC component from the output signal of the full-wave-rectifying unit and outputting the extracted DC component; a reference voltage level adjustment unit for adjusting a DC level of a reference voltage; and a comparison unit for comparing the output signal of the low-pass filter with the output signal of the reference voltage level adjustment unit to adjust a gain of the variable gain amplifier.
    Type: Application
    Filed: April 14, 2006
    Publication date: February 22, 2007
    Inventors: Dae-hoon Kwon, Jeong-won Lee
  • Patent number: 7177245
    Abstract: An apparatus for generating tracking error signals including: an optical detection unit having a plurality of divided light receiving elements to allow beams reflected from a recording surface of the optical disks to be incident; a comparator for outputting after comparing the signals from light receiving elements, which correspond to the set group of the optical detection unit, with the reference signals set for the each group; an error correction unit for correcting and outputting errors if there are any errors after mutual comparison with signals of the groups output from the comparator; a phase-difference detection unit for outputting the signals for each group that correspond to a phase-difference after mutual comparison of the signals of the groups output from the error correction unit; a subtractor for mutually subtracting the signals for each group from the phase-difference detection unit and outputting the tracking error signals.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: February 13, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-Hoon Kwon, Gae-ok Cho
  • Publication number: 20060285451
    Abstract: An apparatus for generating tracking error signals including: an optical detection unit having a plurality of divided light receiving elements to allow beams reflected from a recording surface of the optical disks to be incident; a comparator for outputting after comparing the signals from light receiving elements, which correspond to the set group of the optical detection unit, with the reference signals set for the each group; an error correction unit for correcting and outputting errors if there are any errors after mutual comparison with signals of the groups output from the comparator; a phase-difference detection unit for outputting the signals for each group that correspond to a phase-difference after mutual comparison of the signals of the groups output from the error correction unit; a subtractor for mutually subtracting the signals for each group from the phase-difference detection unit and outputting the tracking error signals.
    Type: Application
    Filed: July 20, 2006
    Publication date: December 21, 2006
    Inventors: Dae-Hoon Kwon, Gae-ok Cho
  • Publication number: 20060176110
    Abstract: A gain control amplifier is provided including: a non-inverting amplifier receiving an input voltage and a direct current reference voltage, and non-inverting amplifying and outputting an alternating component of the input voltage using a predetermined voltage gain based on the direct current reference voltage; and an offset compensator removing a direct current offset component from an output voltage of the non-inverting amplifier using at least two operational amplifiers. The non-inverting amplifier includes: a ladder-shaped resistor varying the voltage gain according to a digital control signal input from an external source.
    Type: Application
    Filed: January 3, 2006
    Publication date: August 10, 2006
    Inventor: Dae-hoon Kwon
  • Patent number: 6903671
    Abstract: Disclosed is a digital-to-analog (D/A) converter with low skew and glitches. The D/A converter has current cells each outputting a different current amount and current switches selectively enabling the current cells, and obtains an analog signal from voltages corresponding to output currents of the current cells by operating the current switches, characterized in that the current switches are each provided with MOS transistors each having an adjusted aspect ratio so as to have a constant capacitance load regardless of the output current amounts from the current cells. In such a D/A converter, parasitic capacitances of MOS transistors provided in the current switches are adjusted constant regardless of output current amounts, so that the D/A converter can operate at a high speed with low skew and glitch.
    Type: Grant
    Filed: January 23, 2004
    Date of Patent: June 7, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-hoon Kwon, Gae-ok Cho, Jae-jun Moon
  • Publication number: 20040150542
    Abstract: Disclosed is a digital-to-analog (D/A) converter with low skew and glitches. The D/A converter has current cells each outputting a different current amount and current switches selectively enabling the current cells, and obtains an analog signal from voltages corresponding to output currents of the current cells by operating the current switches, characterized in that the current switches are each provided with MOS transistors each having an adjusted aspect ratio so as to have a constant capacitance load regardless of the output current amounts from the current cells. In such a D/A converter, parasitic capacitances of MOS transistors provided in the current switches are adjusted constant regardless of output current amounts, so that the D/A converter can operate at a high speed with low skew and glitch.
    Type: Application
    Filed: January 23, 2004
    Publication date: August 5, 2004
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae-hoon Kwon, Gae-ok Cho, Jae-jun Moon
  • Publication number: 20040022142
    Abstract: An apparatus for generating tracking error signals including: an optical detection unit having a plurality of divided light receiving elements to allow beams reflected from a recording surface of the optical disks to be incident; a comparator for outputting after comparing the signals from light receiving elements, which correspond to the set group of the optical detection unit, with the reference signals set for the each group; an error correction unit for correcting and outputting errors if there are any errors after mutual comparison with signals of the groups output from the comparator; a phase-difference detection unit for outputting the signals for each group that correspond to a phase-difference after mutual comparison of the signals of the groups output from the error correction unit; a subtractor for mutually subtracting the signals for each group from the phase-difference detection unit and outputting the tracking error signals.
    Type: Application
    Filed: May 5, 2003
    Publication date: February 5, 2004
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dae-Hoon Kwon, Gae-ok Cho
  • Patent number: 5965947
    Abstract: In a semiconductor package which includes a plurality of semiconductor chips of different kinds, some of the chips are bonded to die bonding pad by means of a conductive adhesive, while the other chips are bonded by means of a non-conductive adhesive that contains highly insulating beads. Encapsulation of the package is by a molding compound. A nitride film or an organic insulating film is disposed on a back side of the chips bonded by the non-conductive adhesive to improve the withstand voltage between these chips and the die pad.
    Type: Grant
    Filed: August 19, 1997
    Date of Patent: October 12, 1999
    Assignee: SamSung Electronics Co., Ltd.
    Inventors: Shi-baek Nam, Seung-kon Mok, Dae-hoon Kwon