baber/WOPTO huggingface dataset:
Patent KR-20110064836-A (KR)
Title: Aircleaner and operation method of the same
Inventor: YUN SEONG JIN
IPC: F24F6/00
Filed: 2009-12-09
Abstract: PURPOSE: An air conditioner and a method for driving the same are provided to reduce air volume without interference of air flow and to improve air conditioning performance. CONSTITUTION: An air conditioner(100) comprises: a device main body(110) having a filter(120) for purifying air; an blower(130) which is mounted inside the device main body and enable inflow and outflow of the air; a humidifier(140) having a humidification member(142) of rotary disk type; and a driving device(150) which rotates the humidification member in forward and reverse direction. The humidification member rotates in forward direction with respect to the air flow direction in case of air conditioning mode.
Patent KR-20110069319-A (KR)
Title: Substrate for package luminous element and substrate package using the same
Inventor: JEON KEUM SOO
IPC: H01L33/64
Filed: 2009-12-17
Abstract: PURPOSE: A substrate for a light emitting device package and the light emitting device package using the same are provided to improve the efficiency of a manufacturing process by only mounting a substrate for a light emitting device package on a printed circuit board without an additional process. CONSTITUTION: A wiring board(100) is comprised of a first metal layer(110), an insulation layer(120), and a second metal layer(130). The insulation layer insulates the first metal layer from the second metal layer. A reflection plate(300) is located on the wiring board. A cavity(310) is formed on the reflection plate to protect the light emitting device. An adhesive sheet(200) is prepared between the wiring plate and the reflection plate and adheres the wiring board to the reflection plate.
Patent KR-20110069580-A (KR)
Title: Variable radiator and control method thereof
Inventor: LEE SANG HUN
IPC: F28D1/00
Filed: 2009-12-17
Abstract: PURPOSE: A variable radiator and a control method thereof are provided to prevent an engine from being overheated by properly controlling cooling capacity depending on various external atmosphere and engine load conditions. CONSTITUTION: A variable radiator comprises a first radiator(11), a second radiator(12), a connection pipe(13), and a direction switching valve(14). A first cooling water inlet(11a) and a first cooling water outlet(11b) are formed in one and the other sides of the first radiator. A second cooling water inlet(12a) and a second cooling water outlet(12b) are formed in one and the other sides of the second radiator. The connection pipe connects the first and second cooling water inlets and the first and second cooling water outlets. The direction switching valve controls the flowing direction of cooling water.
Patent KR-20110070038-A (KR)
Title: System, server and method for the drm enabled application development environment based on gpos
Inventor: LEE SOON HO
IPC: G06Q30/06
Filed: 2009-12-18
Abstract: PURPOSE: An integrated application development environment providing system which copyright protection enables on the basis of GPOS, a server and a method thereof are provided to enable development and purchase of a reliable application by filtering a malicious application. CONSTITUTION: A portal provider(133) comprises a developer portal and a buyer portal. Two more terminals(110) with different kind comprising a smart phone based on a GPOS(General Purpose Operating System) is connected to the portal provider. A database(150) stores a development tool and an application. A syndicator(170) supports data synchronization between the terminals. The portal provider offers an execution right check module to a developer. The execution right check module is added to the application, checks the execution authority, and permits the execution of the application according to the check result.
Patent KR-20110073862-A (KR)
Title: Auger drilling machine
Inventor: KIM MAN JIN
IPC: E21B3/02
Filed: 2009-12-24
Abstract: PURPOSE: An auger drilling machine is provided to improve cost-efficiency by minimizing the size of a hammer formed for placing a beam after a drilling work. CONSTITUTION: An auger drilling machine comprises a beam(B). The beam is placed on the ground excavated by an auger drill and comprises a guide unit and a recess unit. The guide unit is protruded to one outer side of the beam to be connected to the other beam. The recess unit is formed in the other inner side of the beam to correspond to the connection of the guide unit.
Patent KR-20110075473-A (KR)
Title: Retardation film and liquid crystal display device having the same
Inventor: CHOI SUNG HYUK
IPC: G02F1/1335
Filed: 2009-12-28
Abstract: PURPOSE: A phase difference film and a liquid crystal display device including the same are provided to enhance utility in a liquid crystal display device for a VA mode. CONSTITUTION: A phase difference film(30a,30b) includes a cellulose component of 100 weight percent. A phase difference film includes an additive for improving retardation of 0.01-30 weight percent. The additive for improving the retardation is expressed by a chemical expression 1. A liquid crystal display device includes a liquid crystal cell(10) and a pair of polarization plates(20a,20b) which are located at both sides of the liquid crystal cell. The liquid crystal display device includes an upper phase difference film(30a) and a bottom phase interference film(30b).
Patent KR-20110075485-A (KR)
Title: Method and apparatus for transmitting signals, method for receiving, method for transmitting and receiving signals
Inventor: PARK HYUN CHEOL
IPC: H04B7/04
Filed: 2009-12-28
Abstract: PURPOSE: A signal transmission method is provided to increase a total usage of a multi input and output system. CONSTITUTION: A signal transmitting device generates a bit string through coding of an input information data bit(S100). The signal transmitting device generates the bit string through random interleaving of the generated bit string(S200). The signal transmitting device performs network-encoding punched bit string of a layer of a high coding rate among a plurality of layers about a bit string of a layer of a low coding rate(S300). The signal transmitting device modulates the network encoded bit string by a preset modulation method(S400).
Patent KR-20110077099-A (KR)
Title: Structure for fastening tooth in android robot
Inventor: HUR MAN HONG
IPC: A61C7/00
Filed: 2009-12-30
Abstract: PURPOSE: A structure for coupling the teeth of an android robot is provided to secure an enough space for repairing and replacing components by simply separating the teeth of an android robot. CONSTITUTION: A structure for coupling the teeth of an android robot couples teeth to the inside an oral cavity formed between upper and lower inner skins(40b,40a). The upper inner skin attaches an flexible outer skin on an inner skin(40) of a face frame. The lower inner skin forms a jaw part. The teeth are composed of upper and lower tooth models(20,30). The upper and lower tooth models are detachably coupled to the inside the oral cavity through magnetic force.
Patent KR-20110078249-A (KR)
Title: Preparation method of polyacrylonitrile precursor based carbon fiber
Inventor: CHOI SHEONG HYUN
IPC: D01F6/18
Filed: 2009-12-31
Abstract: PURPOSE: A method of manufacturing polyacrylonitrile group precursor fiber for carbon fiber is provided to manufacture stable precursor by managing frequency of a gel polymer existing in a doped solution to a certain level and to have an high-end propety of matter by carrying out anti-flame and carbonation processes of the precursor. CONSTITUTION: The method of manufacturing polyacrylonitrile group precursor fiber for carbon fiber is as follows. A copolymer co-polymerizes acylonitrile monomer and vinyl comonomer including carboxyl group. The polyacrylonitrile group precursor fiber for carbon fiber collects defoamed and non-reactive acylonitrile monomer, and is manufactured by using a doped solution. The doped solution manages and produces the gel polymer frequency less than 20 the / mm^2.
Patent KR-20090031601-A (KR)
Title: Manufacturing method of the vacuum heat insulator
Inventor: TENRA TOMOHISA
IPC: G01M99/00
Filed: 2006-05-19
Abstract: A vacuum heat insulator (2) comprising a core material (3) and a sheath (4) covering the core material (3), wherein the inside of the sheath (4) is vacuumed and the core material (3) comprises a laminate of a strong glass fiber which is reduced in brittleness and improved in fiber strength. By virtue of this constitution, the vacuum heat insulator (2) is improved in heat insulation performance and can be produced at a reduced material cost.
Patent KR-20090026355-A (KR)
Title: Stainless steel wire with flux core for welding zinc coated steel sheets
Inventor: MIZUMOTO MANABU
IPC: B23K103/04
Filed: 2007-07-04
Abstract: A stainless steel wire having a flux core for welding zinc-based alloy coated steel sheet having an outer metal sheath coating a core of flux wherein in total having in mass (%) as percentage to the total mass of the wire: C: 0.01-0.05 %, Si: 0.1-1.5 %, Mn: 0.5-3.0 %, Ni: 7.0-10.0 %, Cr: 26.0-30.0 %, wherein an F value defined as a function of the above components ranges from 30 to 50, the flux further having a slag formation agent in mass (%) as percentage to the total mass of the wire: TiO2 : 0.6-2.6 %, SiO2 : 1.8-3.8 %, ZrO2 : 1.0-3.5 %, and optionally Al2O3: 0.1-1.0 %, wherein the slag formation agent in total is less than 10%, and the wire further containing Fe and residual impurities.
Patent KR-20090032117-A (KR)
Title: Moving picture coding method, moving picture decoding method and computer readable recording medium having recorded program thereof
Inventor: LU JIUHUAI
IPC: H04N19/50
Filed: 2004-02-18
Abstract: The present invention provides a picture coding method for predictively coding a picture with reference to a picture obtained from pictures which are coded and decoded; performing filtering processing (112) on a decoded picture; storing a filtered picture in a memory as a reference picture, out of two pictures: a filtered picture and an unfiltered picture, said filtered picture being a filtered decoded picture and said unfiltered picture being the decoded picture; and storing an unfiltered picture in the memory as a picture for output out of the two pictures.
Patent KR-20090046842-A (KR)
Inventor: RAUSCHMAYER RICHARD
IPC: G06F1/00
Filed: 2006-07-18
Abstract: 모듈러, 적응형 전력 관리 시스템은 하드 디스크 드라이브 제어기, 판독 채널 모듈, 호스트 인터페이스 제어기 및 전력 관리 시스템을 포함한다. 하드 디스크 제어기는 프로세서 실행 펌웨어를 포함하고, 호스트 인터페이스 제어기는 호스트 인터페이스를 통해 호스트 액세스를 제공한다. 시스템은 전력 아일랜드 레지스터와 발진 제어 레지스터를 포함한다. 두 레지스터들은 펌웨어와 호스트 인터페이스를 통해 기록할 수 있다. 하드 디스크 제어기, 인터페이스 제어기, 판독 채널 모듈 및 전력 관리 시스템은 2개 이상의 별개의 전력 아일랜드들에 걸쳐서 구현되고 2개 이상의 별개의 클럭들을 이용한다. 2개 이상의 별개의 전력 아일랜드들로의 전력은 전력 아일랜드 레지스터를 통해 전력 관리 시스템에 의해 적어도 부분적으로 제어되고, 2개 이상의 별개의 클럭들은 발진 제어 레지스터를 통해 전력 관리 시스템에 의해 각각 제어된다.  
     
     적응형 전력 관리 시스템, 하드 디스크 제어기, 인터페이스 제어기, 판독 채널 모듈, 발진 제어 레지스터, 전력 아일랜드 레지스터, 호스트 인터페이스
Patent KR-20090045354-A (KR)
Inventor: CHEN SHOUJUN
IPC: A61K31/16
Filed: 2007-08-20
Abstract: 화학식 (I), (III), (IV), (VII), (X), (XI), (XII), (XIII) 및 (XIV)의 화합물(식 중 변수는 청구항에 정의된 바와 같음), 본 발명의 화합물을 사용하여 암과 같은 증식성 장애에 걸린 대상을 치료하기 위한 방법, 및 Hsp70 유도 및/또는 자연 살상 유도에 반응하는 장애를 치료하기 위한 방법이 개시되어 있다. 또한 본 발명의 화합물 및 약학적으로 허용가능한 담체를 포함하는 약학적 조성물이 개시되어 있다.
Patent KR-20090051243-A (KR)
Inventor: GULSEN JOHN K
IPC: H05B41/392
Filed: 2007-08-30
Abstract: 펄스 밀도 변조(PDM)는 대략 형광램프 안정기 인덕터와 형광램프 필라멘트 캐패시터의 직렬 공진주파수인 저주파 전압을 형광램프 필라멘트에 인가하고, 전압을 인가하지 않고, 그리고 고주파 전압을 인가함으로써, 형광램프로부터의 광량을 제어하는데 사용된다. 형광램프 가스는 저주파 전압이 인가되었을 때만 광을 만들기 위해 이온화된다. 형광램프 가스는 고주파 전압이 인가되었을 때 이온화되지 않지만, 고주파 전압은 낮은 광 출력 상태 동안 형광램프 필라멘트를 뜨겁게 유지한다. 저주파 전압, 무전압, 고주파 전압은 연속적으로 반복하는 변조 프레임 시간내에서 일어나는 시간을 갖는다. 저주파 전압 시간, 무전압 및/또는 고주파 전압 시간의 비율은 형광램프의 광 출력을 결정한다.
Patent KR-20090052377-A (KR)
Inventor: HUNKELER TERESA
IPC: H04W48/10
Filed: 2003-09-26
Abstract: 무선 LAN에서 핸드오버 정보를 브로드캐스팅하기 위한 방법 및 시스템이 개시된다. 핸드오버 정보는 비콘 프레임에서 브로드캐스팅됨에 따라 무선 LAN에서 동작하는 WTRU는 원하는 대로 이용 가능한 대체 시스템으로 핸드오버된다. WTRU는 비콘 프레임을 판독하고 커리리지 영역이 무선 LAN의 것과 중첩하는 대체 시스템으로 핸드오버하는 데 적절한 정보를 취득한다. 그 대체 시스템은 무선 시스템의 어느 하나의 유형의 무선 시스템일 수 있으며 무선 LAN은 어느 하나의 유형의 무선 LAN일 수 있다.
Patent KR-20100014240-A (KR)
Title: Method for producing a semiconductor-on-insulator structure
Inventor: KONONCHUK OLEG
IPC: H01L21/322
Filed: 2006-12-26
Abstract: The invention relates to a process of treating a structure for electronics or optoelectronics, the structure comprising successively:-a substrate,-a dielectric layer having a thermal conductivity substantially higher than the thermal conductivity of an oxide layer made of an oxide of a semiconductor material,-an oxide layer made of an oxide of the said semiconductor material,-a thin semiconductor layer made of said semiconductor material, characterized in that it comprises a heat treatment of the structure in an inert or reducing atmosphere with a temperature value and a duration chosen for inciting an amount of oxygen of the oxide layer to diffuse through the semiconductor layer so that the thickness of the oxide layer decreases by a determined value. The invention also relates to a process of manufacturing a structure for electronics or optoelectronics comprising the said heat treatment.
Patent KR-20090115112-A (KR)
Title: Beacon coding in wireless communications systems
Inventor: RICHARDSON TOM
IPC: H04B1/69
Filed: 2007-10-26
Abstract: Systems and methodologies are described that facilitate transmitting beacon symbols of a beacon message such that a sequence of symbols can satisfy a linear constraint over a field where the field elements can be identified with carriers. In this regard, a coding scheme can be applied to a beacon message; the coding scheme can produce a plurality of beacon symbols to transmit on given subcarriers. A receiving device of the beacon symbols can decode a beacon message by receiving less than the total number of symbols in a beacon message and determining the remaining symbol subcarriers based on the linear constraint. Thus, more efficient decoding of beacons is facilitated as well as resolving beacon ambiguity by figuring out which symbols satisfy linear constraints for the symbols, and resolving time and frequency shift by detecting an offset that would result in satisfaction of the linear constraint.
Patent KR-20090074094-A (KR)
Title: Winder for winding strips
Inventor: KIPPING MATTHIAS
IPC: B65H59/00
Filed: 2007-11-26
Abstract: The invention relates to a winder (1) for winding strips (2), in particular thin metal strips, comprising a coiler drum (3) which is arranged such that it can rotate about a rotational axis (4), and at least one pivoting arm (5) which is arranged such that it can pivot about an axis (6) and which has at least one deflection plate (7) and at least one pressure roller (8), which deflect and press the strip (2) which is to be wound. In order to improve, in particular, the winding of thin strips, the invention provides for the at least one pressure roller (8) to be assigned at least one movement means (9), by way of which the pressure roller (8) can be moved relative to the pivoting arm (5).
Patent KR-20090085080-A (KR)
Title: Method for preparing a polymer conjugate
Inventor: ZHANG WEN
IPC: A61K31/337
Filed: 2007-11-30
Abstract: Provided herein is a straightforward and efficient method for covalently attaching a polyethylene glycol polymer to an active agent. ® KIPO & WIPO 2009
Patent KR-20090091749-A (KR)
Title: Rubber composition for tyres incorporating a novel antioxidant system
Inventor: ARAUJO DA SILVA JOSE CARLOS
IPC: C08L9/00
Filed: 2007-11-08
Abstract: Rubber composition in particular for tyres, based on at least one diene elastomer, one reinforcing filler, one crosslinking system and one antioxidant system, characterized in that said antioxidant system comprises at least two antioxidants 'A' and 'B': A. an N-alkyl-N'-phenyl-para-phenylenediamine corresponding to formula (I): B. a 4,4'-bis(alkylamino)triphenylamine corresponding to formula (II): in which formulae, R1, R2 and R3, which may be identical or different, are each a linear or branched alkyl group containing from 1 to 12 carbon atoms or a cycloalkyl group containing from 5 to 8 carbon atoms, wherein the A/B weight ratio is between 0.2 and 5.0. Such an antioxidant system confers on the composition of the invention better long-term resistance to fatigue and to the propagation of cracks. ® KIPO & WIPO 2009
Patent KR-20090088428-A (KR)
Title: Process for preparing 2-amino-5-cyanobenzoic acid derivatives
Inventor: BRUENING JOERG
IPC: C07C213/02
Filed: 2007-12-05
Abstract: Disclosed is a method for preparing a compound of Formula (1) comprising contacting a compound of Formula (2) with at least one compound of Formula 3 in the presence of a solvent comprising one or more organic solvents selected from ethers and nitriles and a catalytically effective amount of a palladium complex comprising at least one tertiary phosphine ligand of Formula (4) wherein R1 is NHR3 or OR4; R2 is CH3or Cl; R3is H, C1-C4alkyl, cyclopropyl, cyclopropylmethyl or methylcyclopropyl; R4 is H or C1-C4alkyl; M1 is an alkali metal; and R5, R6 and R7 are defined in the disclosure; provided that when R2 is Cl, then X is Br. Also disclosed is a method for preparing a compound of Formula 5 wherein R14, R15, R16 and Z are as defined in the disclosure using a compound of Formula 1 characterized by preparing the compound of Formula (1) by the aforedescribed method. ® KIPO & WIPO 2009
Patent KR-20090112689-A (KR)
Title: Methods and system for utility network outage detection
IPC: H04N13/02
Filed: 2007-07-13
Abstract: The present invention provides a system including a utility network including a product distribution pathway for delivering a product, a plurality of electronic utility devices associated with the utility network to monitor at least one parameter associated with the product distribution pathway, and a management processor in communication with the devices and operable to poll at least a subset of the electronic utility devices in response to an input to evaluate performance of one of the utility network and the system in response to information relating to the at least one parameter. The evaluation can include a rule-based analysis of one of the parameter and the information relating to the parameter.
Patent KR-20090119866-A (KR)
Title: Method and device for controlling a fire-extinguishing system of the high-pressure gas type
Inventor: LUEDERS BRUNO
IPC: A62C99/00
Filed: 2007-10-19
Abstract: The invention relates to a fire-extinguishing system of the high-pressure gas type, in which the gaseous extinguishing agent is stored under high pressure in at least one high-pressure gas bottle (1). The bottle valve operates, with interposition of a container attachment for the extinguishing gas, as a pressure-controlled, reducing and self-regulating control valve (3). By means of a predetermined control pressure which corresponds to the pressure in the extinguishing line system (2), the pressure of the extinguishing gas is reduced from, for example, 150 to 300 bar within the control valve to, for example, 60 bar. This makes it possible to dispense with all the high-pressure components used to date between the bottle valve and the extinguishing line system. Furthermore, a computational software is no longer required.
Patent KR-20090111351-A (KR)
Title: User interface generator, information terminal, user interface generation control program, recording medium, and user interface generation method
IPC: G06F9/44
Filed: 2008-02-08
Abstract: A user interface generator for generating a user interface from user interface template data for execution comprises a UI template selecting section (20) for selecting the user interface template data from service description data describing service that the user utilizes and terminal data expressing the state of a terminal that the user utilizes and a UI description generating section (50) for generating the user interface from the service description data and the user interface template data selected by the UI template selecting section (20). This provides a method for using a template to flexibly generate a user interface and a user interface generator using the same.
Patent KR-20090125259-A (KR)
Title: Method for producing epothilone derivatives by means of selective catalytic epoxidation
Inventor: PLATZEK JOHANNES
IPC: C07D417/04
Filed: 2008-03-27
Abstract: The invention relates to a novel method for producing an epothilone derivative using substituted pyridines and methyltrioxorhenium as catalysts.
Patent KR-20100028534-A (KR)
Title: Dried food compositions
Inventor: MUELLER IZUMI
IPC: A23L13/00
Filed: 2008-04-04
Abstract: The invention provides dried food compositions. In particular, the dried food compositions generally contain a structured protein along with other macronutrients and micronutrients.
Patent KR-20100085843-A (KR)
Title: Liquid crystal display device and electronic apparatus
Inventor: INOUE YUICHI
IPC: G09G3/36
Filed: 2010-01-08
Abstract: PURPOSE: A liquid crystal display device and an electronic device are provided to prevent the orientation dispersion of a liquid crystal molecule by an electric field leakage from electrode members consisting of a pixel electrode. CONSTITUTION: A scan line(5) and a common line(9) are successively formed on a substrate(3) to the first direction. A signal line(7), a source electrode of a thin film transistor, and a drain electrode is prepared on a gate insulating layer which a semiconductor layer is prepared. Each pixel electrode(11) includes a connection electrode(11a) of a border shape and a plurality of electrode units(11b) which is supported in the connection electrode. A liquid crystal layer is arranged between the substrate which the pixel electrode is arranged and an opposite substrate which a common electrode is prepared.
Patent KR-20110083036-A (KR)
Title: Protection sheet
Inventor: LEE CHANG MIN
IPC: C08K7/26
Filed: 2010-01-13
Abstract: PURPOSE: A protective sheet is provided to ensure excellent mechanical strength and excellent flexibility and to impart excellent scratch resistance and abrasion resistance. CONSTITUTION: A protective sheet(100) with excellent scratch resistance and hardness is prepared with a UV curable resin including 1~50 weight% of amorphous porous silica(110). The UV curable resin excluding porous silica includes 2~100 parts by weight of one or mixture selected from acrylate- or methacrylate- or vinyl-based monomers with UV reactivity based on 2~100 parts by weight of an oligomer; 0.2~20 parts by weight of photopolymerization initiators; and 0.2~20 parts by weight of a compound having a silicon group or fluorine group or both of them.
Patent KR-20110088727-A (KR)
Title: Apparatus and method for rotating display image in portable terminal
Inventor: LEE YOON GI
IPC: H04B1/40
Filed: 2010-01-29
Abstract: PURPOSE: A device for rotating an output image in a mobile terminal and a method thereof are provided to set a rotating direction and a rotating angle through a simple touch manipulation. CONSTITUTION: If a touch input for rotating an image is sensed, a mobile terminal output an image rotating menu(203,205). If a touch about the rotating menu is sensed, the mobile terminal calculates a rotation angle of the rotating menu(207,211). If the input of a user for the image rotation is released, the mobile terminal rotates the image along a set rotation angle(213,215).
Patent KR-20110094518-A (KR)
Title: 뼈 성장 촉진용 조성물
Inventor: AHN GHE WHAN
IPC: A61K36/886
Filed: 2010-02-17
Abstract: 뼈 성장 촉진용 조성물이 제공된다.  
본 발명의 실시예에 따른 뼈 성장 촉진용 조성물은 황금 추출물과 알로에베라겔 분말을 유효성분으로 함유한다. 또한, 본 발명의 다른 실시예에 따른 건강기능식품은 황금 추출물과 알로에베라겔 분말을 유효성분으로 함유하는 뼈 성장 촉진용 조성물을 포함한다.  
본 발명의 실시예에 따른 뼈 성장 촉진용 조성물은 조골세포 분화 촉진과 함께 면역력 향상을 도모함으로써 성장기 어린이 및 청소년의 뼈 성장 촉진에 유효한 효과를 기대할 수 있다.
Patent KR-20110096616-A (KR)
Inventor: KIM JOUNG YEAL
IPC: G11C7/06
Filed: 2010-02-23
Abstract: 비트라인 센스 앰프는 프리센싱부 및 증폭부를 포함한다. 프리센싱부는 제1 비트라인의 전압 레벨의 변화 및 적어도 하나의 프리센싱 전원전압에 기초하여 제2 비트라인의 전압을 제어하여 프리센싱(pre-sensing) 동작을 수행한다. 증폭부는 제1 전원 전압 및 제2 전원 전압에 기초하여 상기 프리센싱 동작 후의 상기 제1 비트라인과 상기 제2 비트라인의 전압차를 증폭하여 주증폭 동작을 수행한다. 비트라인 센스 앰프는 별도의 프리센싱 전원전압을 사용하여 제1 비트라인과 제2 비트라인의 전압 레벨의 차이를 효과적으로 증폭시킬 수 있다.