Hyung Gu
Hyung Gu Hwang, Daejeon KR
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20130070811 | TRANSMISSION/RECEPTION APPARATUS AND METHOD FOR FILTERED MULTI-TONE SYSTEM - Disclosed are an apparatus for transmitting multi-carrier signals, including: a signal spreading unit configured to generate band-spread signals through band spreading of a plurality of symbol-mapped signals; and a modulation unit configured to generate a modulation signal by mixing the band-spread signals with a plurality of sub-carriers and adding up the mixed band-spread signals, and a method for transmitting multi-carrier signals. | 03-21-2013 |
Hyung Gu Kim, Seoul KR
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20150057751 | ACELLULAR DERMAL GRAFT - An acellular dermal graft is provided. The acellular dermal graft may be useful in minimizing side effects caused after transplantation since an environment favorable for formation of new blood vessels and proliferation of autologous tissues is provided by forming a multi-penetration structure in an acellular dermal tissue, removing a basement membrane layer and/or subjecting corners to slope cutting, and transplantation is stably performed within a short transplantation time due to improved extensibility and flexibility of tissues. The acellular dermal graft may be useful in reducing a time required to recover tissues after transplantation since the transplantation is stably performed due to improved grafting reaction with a host tissue by enhancing uptake of fibroblasts and promoting angiogenic activities. Also, the acellular dermal graft may be useful in maintaining smooth external appearance since hypodermic implantation is easily performed upon transplantation, and the skin at a graft site does not protrude after transplantation. | 02-26-2015 |
Hyung Gu Lee, Suwon-Si KR
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20140375845 | METHODS FOR LENS CALIBRATION AND IMAGE RESTORATION - In one example embodiment, a lens calibration method includes generating a distorted image by distorting a pattern image that includes at least two reference points separated from a center of the pattern image by different distances. The method further includes generating lens calibration data by comparing the pattern image with the distorted image. | 12-25-2014 |
Hyung Gu Park, Seoul KR
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20140035684 | CONTROL CIRCUIT AND APPARATUS FOR DIGITALLY CONTROLLED OSCILLATOR - There are provided a control circuit for a digitally controlled oscillator and a control apparatus for a digitally controlled oscillator using the same. The control circuit for a digitally controlled oscillator includes: a peak detection circuit detecting amplitude of a signal output from the digitally controlled oscillator; and a transconductance control circuit comparing an output of the peak detection circuit with a predetermined reference signal to control a transconductance value of a negative transconductance circuit included in the digitally controlled oscillator. | 02-06-2014 |
20140319923 | APPARATUS AND METHOD FOR TRANSMITTING WIRELESS POWER - The present invention relates to an apparatus and a method for transmitting wireless power, and more particularly, to an apparatus and a method for transmitting wireless power that rapidly and precisely adjusts impedance so as to transmit desired power. Disclosed an apparatus for transmitting wireless power that performs wireless power transmission, including: an oscillator; an amplifier; an impedance matcher including a matching network which adjusts impedance according to a digital control signal and an analog signal, a sensor, a digital controller which outputs a digital control signal, and generates an analog control start signal when adjustment of the impedance by the digital control signal is completed, and an analog controller which outputs the analog control signal, and a transmitting antenna which radiates the magnetic field by using the transmission power. | 10-30-2014 |
Hyung Gu Park, Suwon-Si KR
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20130316661 | TRANSCEIVER USING TECHNIQUE FOR IMPROVEMENT OF PHASE NOISE AND SWITCHING OF PHASE LOCK LOOP (PLL) - A transceiver may include a reception (Rx) radio frequency (RF) part configured to process a received signal, a transmission (Tx) RF part configured to process a transmitted signal, and a phase lock loop (PLL) configured to provide a reception frequency to the reception RF part and provide a transmission frequency to the transmission RF part. The PLL may be controlled according to whether the reception RF part or the transmission RF part is on. In addition, a transceiver may include quenching waveform generator (QWGs) to control quenching waveforms of the RF parts corresponding to a plurality of antennas. The quenching waveforms may be generated respectively by VCOs operating at a same frequency. The QWGs may control the VCOs such that the quenching waveforms do not overlap. | 11-28-2013 |
Hyung Gu Yun, Daejeon KR
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20140147706 | SECONDARY BATTERY PACK - Disclosed herein is a secondary battery pack including a battery cell having an anode terminal and a cathode terminal formed at one face having a sealed surplus portion and a protection circuit module (PCM) electrically connected to the battery cell via the anode terminal and the cathode terminal, wherein the PCM includes a board having a protection circuit formed thereon, the board being provided with an anode terminal connection part and a cathode terminal connection part connected to the anode terminal and the cathode terminal, respectively, a PCM case configured to receive the board through an open face thereof so that the PCM case surrounds the board, and an electrically insulative lid to close the open face of the PCM case. | 05-29-2014 |