Sung-Youl
Sung-Youl Choi, Hwaseong-Si KR
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20130093511 | APPARATUS AND METHOD FOR IMPROVING EFFICIENCY IN POWER AMPLIFIER - An apparatus and method for enhancing the whole efficiency of power amplification in a supply modulated amplifier are provided. The power amplification apparatus includes a controller, a Doherty power amplifier, and a supply modulated amplifier. The controller selects a power amplifier among the Doherty power amplifier and the supply modulated amplifier. The Doherty power amplifier amplifies a power of a transmission signal when the Doherty power amplifier is selected by the controller. The supply modulated amplifier amplifies the power of the transmission signal using a supply voltage determined considering the amplitude of the transmission signal, when the supply modulated amplifier is selected by the controller. | 04-18-2013 |
Sung-Youl Choi, Suwon-Si KR
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20090009470 | WRISTWATCH-TYPE MOBILE TERMINAL HAVING PRESSURE SENSOR AND METHOD FOR RECEIVING USER INPUTS THEREIN - Disclosed is a wristwatch-type mobile terminal and method for receiving user inputs therein, which can efficiently receive user inputs through a pressure sensor. The method for receiving user inputs in a wristwatch-type mobile terminal includes providing a sensor unit to the wristwatch-type mobile terminal and detecting a user input through the sensor unit, deciding an operation corresponding to a corresponding location of the sensor unit depending on the user input, determining whether the decided operation relates to movement of a pointer movable on a display screen, determining whether pressure of the user input is more than a preset value when the decided operation relates to the movement of the pointer, and moving the pointer a first distance and displaying the pointer when the pressure of the user input is not more than the preset value, or moving the pointer a second distance and displaying the pointer when the pressure of the user input is more than the preset value. | 01-08-2009 |
Sung-Youl Choi, Ulsan-City KR
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20090315724 | PROGRAMMABLE MIT SENSOR USING THE ABRUPT MIT DEVICE, AND ALARM APPARATUS AND SECONDARY BATTERY ANTI-EXPLOSION CIRCUIT INCLUDING THE MIT SENSOR - Provided are an abrupt MIT device with variable MIT temperature or voltage, an MIT sensor using the abrupt MIT device, and an alarm apparatus and a secondary battery anti-explosion circuit including the MIT sensor The MIT device includes an abrupt MIT layer undergoing an abrupt MIT at a transition temperature or a transition voltage and at least two electrode layers contacting the abrupt MIT layer. The transition temperature or the transition voltage varies with at least one of factors including a voltage applied to the electrode layers, a temperature, an electromagnetic wave, a pressure, and a gas concentration that affect the abrupt MIT layer. The MIT sensor is a temperature sensor, an infrared sensor, an image sensor, a pressure sensor, a gas-concentration sensor, or a switch. The alarm apparatus includes the MIT sensor and an alarm-signaling unit connected in series with the MIT sensor. The secondary battery anti-explosion circuit includes a secondary battery, the MIT sensor attached to the secondary battery to sense the temperature of the secondary battery and thus to prevent the possible explosion of the secondary battery, and a protection circuit body powered by the secondary battery. | 12-24-2009 |
20100085126 | OSCILLATION CIRCUIT INCLUDING MIT DEVICE AND METHOD OF ADJUSTING OSCILLATION FREQUENCY OF THE OSCILLATION CIRCUIT - Provided are an MIT device-based oscillation circuit including a power source, an MIT device and a variable resistor, in which a generation of an oscillation and an oscillation frequency are determined according to a voltage applied from the power source and a resistance of the variable resistor, and a method of adjusting the oscillation frequency of the oscillation circuit. The MIT device includes an MIT thin film and an electrode thin film connected to the MIT thin film, and generates a discontinuous MIT at an MIT generation voltage, the variable resistor is connected in series to the MIT device, and the power source applies a voltage or an electric current to the MIT device. The generation of an oscillation and an oscillation frequency are determined according to the voltage applied from the power source and the resistance of the variable resistor. | 04-08-2010 |
20100213472 | Photo-gating Switch System - A photo-gating switch system comprising a photosensitive device formed on a substrate is provided. The photosensitive device may comprise a photosensitive layer and electrodes formed at both ends of the photosensitive layer. A light source irradiating light to the photosensitive device is integrated beneath the surface of the substrate. | 08-26-2010 |
20100301300 | Three-terminal metal-insulator transition switch, switching system including the same, and method of controlling metal-insulator transition of the same - Provided are a 3-terminal MIT switch which can easily control a discontinuous MIT jump and does not need a conventipnal gate insulating layer, a switching system including the 3-terminal MIT switch, and a method of controlling an MIT of the 3-terminal MIT switch. The 3-terminal MIT switch includes a 2-terminal MIT device, which generates discontinuous MIT in a transition voltage, an inlet electrode ( | 12-02-2010 |
20110233616 | GERMANIUM BASED METAL-INSULATOR TRANSITION THIN FILM, METAL-INSULATOR TRANSITION DEVICE INCLUDING THE METAL-INSULATOR TRANSITION THIN FILM, AND METHOD OF FABRICATING THE METAL-INSULATOR TRANSITION DEVICE - Provided are a germanium (Ge) based metal-insulator transition (MIT) thin film which is formed of a Ge single-element material instead of a compound material of two or more elements and by which material growth may be easily performed and a problem of a second phase characteristic in accordance with a structural defect and an included impurity may be solved, an MIT device including the MIT thin film, and a method of fabricating the MIT device. The MIT device includes a substrate; a germanium (Ge) based MIT thin film which is formed of a Ge single-element material on the substrate and in which a discontinuous MIT occurs at a predetermined transition voltage; and at least two thin film electrodes contacting the Ge based MIT thin film, wherein the discontinuous MIT occurs in the Ge based MIT thin film due to a voltage or a current which is applied through the thin film electrodes. | 09-29-2011 |
Sung-Youl Kim, Seongnam-Si KR
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20140041464 | SENSOR HAVING AN EMBEDDED ELECTRODE, AND METHOD FOR MANUFACTURING SAME - Disclosed is a sensor having an embedded electrode, which can be manufactured at a reduced cost and applied to many different fields. The sensor comprises: a sensing stack in which a first conductive layer and a second conductive layer are stacked and layered with a separation layer interposed therebetween; and an electrode terminal arranged at a side surface of the sensing stack and electrically connected to the first and second conductive layers. The first and second conductive layers are exposed on at least one side surface of the sensing stack except for the side surface on which the electrode terminal is arranged, to thereby form a sensing surface. | 02-13-2014 |
Sung-Youl Ko, Kyonggi-Do KR
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20080317769 | Vaccine Composition Comprising Alpha-Galactosylceramide as an Adjuvant For Intranasal Administration - The present invention related to a vaccine composition comprising alpha-galactosylceramide (αGalCer) as an adjuvant for the intranasal administration. The present inventors administered αGalCer together with a tumor cell antigen or a virus antigen to the nasal cavity of a mouse and then confirmed that the αGalCer effectively induced not only humoral immunity but also cell-mediated immunity. Thus, the αGalCer can be effectively used as an adjuvant for a vaccine by the intranasal administration for the prevention and treatment of virus infection and cancer. | 12-25-2008 |
Sung-Youl Park, Daejeon KR
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20120253091 | METHOD FOR MAKING HYDROCARBONS BY USING A LIPID DERIVED FROM A BIOLOGICAL ORGANISIM AND HYDROTALCITE - The present invention relates to a method in which a catalytic reaction is used in order to produce hydrocarbons from renewable starting material derived from biological organisms such as vegetable lipids, animal lipids, and lipids extracted from macroalgae and microalgae, and more specifically relates to a method for selectively making a hydrocarbon, which is suitable for making gasoline or diesel, by removing the oxygen contained in the starting material without consuming hydrogen. In the present invention, the production takes place by bringing the starting material into contact with hydrotalcite, which constitutes a catalyst, thereby removing oxygen via a decarboxylation or decarbonylation reaction; and the starting material is one or more such material selected from triglycerides, fatty acids, and fatty acid derivatives obtained from a renewable source of supply originating from a biological organism. | 10-04-2012 |
Sung-Youl Park, Seoul KR
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20090286474 | RADIO REPEATER FOR MOBILE COMMUNICATION SYSTEM AND REPEATING METHOD USING THE SAME - Disclosed herein is a radio frequency (RF) repeater comprising an analog signal processing unit and a digital signal processing unit, wherein the analog signal processing unit includes a filtering unit; an amplification unit on receiving side; a frequency conversion unit on receiving side; a frequency conversion unit on transmitting side; and an amplification unit on transmitting side, and the digital signal processing unit includes a receiving signal detection unit; the automatic gain control unit; a feedback signal detection unit; a feedback signal combining unit; a feedback signal elimination unit; an automatic delay control unit; and the control unit. | 11-19-2009 |