baber/WOPTO huggingface dataset:
Patent KR-20040046143-A (KR)
Title: A sorting device of Construction Wastes and method thereof
Inventor: KIM HYEOK
IPC: B02C23/08
Filed: 2002-11-26
Abstract: PURPOSE: An apparatus for screening a construction waste and a screening method using the same are provided to remove steel reinforcement, woods and ironware from the construction waste, in advance, thereby preventing a conveyer belt from tearing and screening the construction waste easily. CONSTITUTION: The apparatus for screening a construction waste comprises a hopper device(10) loading the construction waste(12) and exhausting the waste in a determined amount; a screening stand(20) having an inlet connected to the hopper device(10) and a plurality of grooves formed in the progressive direction of the construction waste; a plurality of springs(24) fixed to the lower part of the screening stand and supporting the screening stand elastically; and a vibrating unit connected to the one side of the screening stand and delivering the vibration to the screening stand.
Patent KR-20040007205-A (KR)
Inventor: HEALY JOHN JOSEPH
IPC: F25B41/04
Filed: 2002-12-12
Abstract: PURPOSE: Refrigeration control is provided to improve the capacity with little power by preventing steam refrigerant from returning to an evaporator through a compressor with a first check valve and securely containing liquid refrigerant in a receiver with a second check valve. CONSTITUTION: A refrigerating system(10) includes an evaporator(24), a variable displacement compressor(12) coupled in fluid communication with the evaporator, a condenser(18) coupled in fluid communication between the compressor and the evaporator, an expansion valve(26) disposed between the condenser and the evaporator, and an isolation valve(22) disposed between the condenser and the expansion valve. The isolation valve is communicated with the compressor to respectively synchronize opening and closing thereof with on- and off-cycles of the compressor to prohibit migration of liquid refrigerant. First and second check valves are respectively associated with the compressor and the condenser for prohibiting reverse migration of refrigerant during the off-cycle.
Patent KR-20030052989-A (KR)
Inventor: OTA HIROYUKI
IPC: H02M1/42
Filed: 2002-12-16
Abstract: PURPOSE: A switching power supply is provided to improve a power factor by expanding an input current conduction angle over a wide range of the input voltage, remove the high frequency components of the input current to a level sufficient for a practical use, reduce a switching loss, and increase efficiency without increasing a size and a cost of a device. CONSTITUTION: A switching power supply comprises a noise filter connected to the AC power supply(1), a bridge rectifying circuit(5) connected to the noise filter, a smoothing capacitor connected to an output side of the bridge rectifying circuit for smoothing a voltage outputted from the bridge rectifying circuit, a transformer(7) having a primary winding(7a) connected to the smoothing capacitor, and a secondary winding(7b) to be connected to the load, a main switching element(8) connected to the smoothing capacitor in series with the primary winding of the transformer, a control circuit(12) connected to the secondary winding of the transformer and the main switching element for detecting a DC voltage at the secondary winding of the transformer to control the main switching element so that the DC voltage to the load is adjusted to a desired value, a first reactor and a first diode disposed in series between the bridge rectifying circuit and the smoothing capacitor, and a second reactor and a second diode disposed in series between a first node connecting the first reactor and the first diode and a second node connecting the primary winding of the transformer and the main switching element.
Patent KR-20040052311-A (KR)
Title: Cable installation method of unmanned tunnel using by rail
Inventor: HAN JA GYEONG
IPC: H02G1/06
Filed: 2002-12-16
Abstract: PURPOSE: A method for installing a cable into a manless cable tunnel using a rail is provided to prevent a new cable from getting twisted to an exist cable. CONSTITUTION: A method for installing a cable comprises a step of installing a rail(10) into an upper side of a manless cable tunnel(1) along a lengthwise direction, a step of installing a hook movable along the rail to the rail, a step of connecting a pulling cable(2) to the hook through one side of the manless cable tunnel and disposing the hook at the other side of the manless cable along the rail, a step of connecting an end part of new cable(3) to the hook disposed at the other side of the manless cable tunnel and pulling the pulling cable to move the hook toward the one side of the manless cable tunnel along the rail, and a step of installing the new cable into the manless cable tunnel.
Patent KR-20040060227-A (KR)
Title: Real-Time Deterioration Diagnosis Apparatus And Real-Time On-line Deterioration Diagnosis System of Power Converter
Inventor: CHO GI YEON
IPC: H02H7/04
Filed: 2002-12-30
Abstract: PURPOSE: A real-time deterioration diagnosis device of a power conversion unit and a real-time online remote deterioration diagnosis device of a power conversion unit are provided to monitor remotely deterioration diagnosis data by using a communication network. CONSTITUTION: A real-time deterioration diagnosis device of a power conversion unit includes a calculation unit, a measurement unit, an identification unit, and a decision unit. The calculation unit calculates a transfer function by analyzing a mathematical model of a DC/DC converter. The measurement unit measures the transfer function of the DC/DC converter. The identification unit identifies states of parameters by comparing coefficients of the transfer function of the calculation unit and the measurement unit to each other. The decision unit decides the deterioration by referring to the states of the parameters.
Patent KR-20020036833-A (KR)
IPC: D01F4/00
Filed: 2000-07-13
Abstract: 본 발명은 콜라겐 100중량부에 대하여 열가소성 수지를 1∼100중량부 배합하여 되며 헤어 아이롱이나 드라이어를 사용한 스타일링 시에도 열손상을 받지 않는 내열성이 우수한 재생 콜라겐 섬유이며, 상기 열가소성 수지가 아크릴산알킬 에스테르계 단량체, 메타크릴산알킬 에스테르계 단량체, 아크릴산, 메타크릴산, 비닐시안계 단량체, 방향족 비닐계 단량체 및 할로겐화 비닐계 단량체로 되는 군으로부터 선택되는 적어도 1종을 중합함에 의해 달성된다.
Patent KR-20020029418-A (KR)
Title: A bushing tip plate support assembly for a bushing in a filament forming apparatus
IPC: C03B37/081
Filed: 2000-07-05
Abstract: A bushing tip plate support assembly for a bushing in a filament forming apparatus is disclosed. The support assembly improves the flatness of the tip section within the spans between the external support and the center support. The filament forming apparatus includes a bushing having a bottom plate from which nozzles or tips depend. The disclosed support assembly is an improvement on the internal support assemblies in conventional bushings because it has several functions. The support assembly includes two vertical dividers mounted in the bushing. The bottom ends of the dividers are welded to the tops of tip plate gussets in the bushing. The dividers are attached to side plates of the bushing as well. An upper portion of each divider serves as an upper side wall for the bushing and defines part of the throat of the bushing into which the molten glass flows. The dividers also include middle and lower portions with perforations through which the glass in the bushing may flow. The openings permit the dividers to thermally mix and homogenize the glass within the bushing. The dividers provide additional tip plate support to conventional tip plate gussets and resistance to long term creep and sag of the bottom plate, especially at the point of maximum deflection of the tip plate.
Patent KR-20020047204-A (KR)
IPC: H04L29/06
Filed: 2000-09-15
Abstract: 인터넷(IP) 기반 패킷 네트워크 사이의 이동성을 제공하기 위한 시스템 및 방법을 개시한다.  개시된 시스템 및 방법은 사용자 장비가 데이터 통신에 있어서 어떤 방해도 없이, 제1 IP 기반 패킷 네트워크로부터 제2 IP 기반 패킷 네트워크로의 로밍을 허용한다.  광역 네트워크 이동성은 기존의 프로토콜이 추가적인 네트워크 게이트웨이 어드레싱 정보를 포함하도록 수정함으로써 성취된다.
Patent KR-20020068520-A (KR)
IPC: C07D317/60
Filed: 2000-10-13
Abstract: 본 발명은, 강산의 존재하에서, 1,2-메틸렌디옥시벤젠을 글리옥실산과 반응시켜 3,4-메틸렌디옥시만델산을 제조하는 방법에 있어서, 비양성자성 유기 용매 및 1,2-메틸렌디옥시벤젠의 1kg 당 100 내지 1200 ml의 유기산들로 구성된 군에서 선택된 한가지 이상의 존재하에 반응시키는 것을 특징으로 하는 3,4-메틸렌디옥시만델산을 제조하는 방법에 관한 것이다.
Patent KR-20030043783-A (KR)
IPC: G06F3/03
Filed: 2001-02-02
Abstract: 본 발명의 터치 스크린용 상부 쉬이트는 터치 표면과 그에 대향하는 제2 표면을 갖는 지지층(70), 상기 지지층(70)의 제2 표면과 접촉하고 있는 제1 표면과 제2 표면을 갖는 편광자 층(72), 및 상기 편광자(72)의 제2 표면과 접촉하고 있는 제1 전도층을 포함한다.
Patent KR-20020091177-A (KR)
Title: 마이크로겔 합성방법 및 이로부터 생산된 생성물
IPC: C08L53/00
Filed: 2001-04-06
Abstract: 본 발명은 한가지 관점에서 RAFT 연쇄전달제의 존재하에서 하나 또는 그 이상의 소용매성 모노머와 하나 또는 그 이상의 친용매성 모노머를 RAFT 중합시켜 분산매질에 불용성인 하나 또는 그 이상의 소용매성 블럭 및 분산매질에 가용성인 하나 또는 그 이상의 친용매성 블럭을 함유하는 하나 또는 그 이상의 블럭 코폴리머를 형성시킴으로서 마이크로겔을 제조하는 방법을 제공한다.  블럭 코폴리머를 분산매질에 분산시켜 미셀을 형성시키고, 이것을 그후에 안정화시켜 마이크로겔을 형성시킨다.  분산매질은 수성이거나 친유성일 수 있다.  본 발명의 방법은 또한, 안료, 염료분자, 및 금속화된 페인트내에서 사용된 알루미늄 플레이크와 같은 매우 다양한 물질의 캅셀화를 가능하게 한다.
Patent KR-20030010614-A (KR)
IPC: C10L1/02
Filed: 2001-04-10
Abstract: 디젤 연료 범위에서 비등하는 분해 스톡과 블렌딩된 디젤 연료 범위에서 비등하는 고품질의 피셔-트롭시 유도된 증류물을 포함하는, 디젤 연료로서 유용한 블렌드, 및 그의 제조 방법으로서, 이때 최종 블렌드는 10 내지 35 중량%의 방향족 화합물 및 1 내지 20 중량%의 다환방향족 화합물을 함유하며 낮은 규제 배출 수준을 제공한다.
Patent KR-20030004427-A (KR)
IPC: H01L21/02
Filed: 2002-03-28
Abstract: 플라즈마 처리 장치는, 외벽에 의해 구획 형성되고 피처리 기판을 보유하는 보유대를 갖춘 처리 용기와, 상기 처리 용기에 결합된 배기계와, 상기 처리 용기 내에 플라즈마 가스를 공급하는 플라즈마 가스 공급부와, 상기 처리 용기 상에 상기 피처리 기판에 대응하여 설치된 마이크로파 안테나와, 상기 보유 대상의 피처리 기판과 상기 플라즈마 가스 공급부의 사이에 상기 피처리 기판에 대면하도록 설치된 처리 가스 공급부로 이루어지고, 상기 처리 가스 공급부는 상기 처리 용기 내에 형성된 플라즈마를 통과시키는 복수의 제 1의 개구부와, 처리 가스원에 접속 가능한 처리 가스 통로와, 상기 처리 가스 통로에 연통한 복수의 제 2의 개구부와, 상기 제 2의 개구부에 대향하여 설치되고 상기 제 2의 개구부로부터 방출되는 처리 가스를 확산시키는 확산부를 갖춘 구성을 한다.
Patent KR-20030097621-A (KR)
Title: Device for exchanging information with storage medium having electronic circuit and the electronic circuit, and system including the same
Inventor: KOMAKI TSUNEMATSU
IPC: G11B7/24
Filed: 1998-06-18
Abstract: PURPOSE: A memory medium having an electronic circuit, a device for changing information with the electronic circuit, and a system including the memory medium and the information exchanging device are provided to establish an equilibrium micro strip line as a communication system with an external unit of an ID(Intelligent Disc) integrating a memory medium and an electronic circuit for the memory medium. CONSTITUTION: An intelligent disc(ID;2) is mounted with an electronic circuit(20) as a communication element having a contact type or non-contact type contact-interface signal line(27). The contact type interface signal line is electrically and mechanically connected to an external contact. The non-contact type interface signal line is connected to the external contact via sound, light, electric wave or induction, wherein a plurality of equilibrium micro strip lines are respectively disposed in the ring shape to a rotator and a stator to make the rotator and the stator correspond to the respective equilibrium micro strip lines one by one even during the rotator is rotating. The ID has an electronic circuit stacking surface and an information memory surface. The electronic circuit stacking surface is stacked with a CPU(21), a ROM(22), a RAM(23) and an interface part(26). The respective electronic circuits are supplied with power by a power supply(24). Information on the information memory surface is read out by reading/writing signals(31) by an optical disc control part(10).
Patent KR-20030010710-A (KR)
IPC: A61P25/28
Filed: 2001-06-14
Abstract: 본 발명은 유효량의 라파마이신을 심혈관, 뇌혈관, 또는 말초혈관 질환의 치료 또는 억제를 필요로 하는 포유동물에게 제공함을 포함하여, 당해 포유동물에서상기 질환의 치료 또는 억제 방법을 제공한다.
Patent KR-20030018000-A (KR)
IPC: G11B7/26
Filed: 2001-06-19
Abstract: 안정된 트래킹 서보와 고밀도의 기록재생이 가능한 광디스크기록매체, 해당 매체의 광디스크장치, 및 해당 매체의 원반제조방법을 제공한다. 본 발명의 광디스크기록매체는, 원반형상의 광자기기록매체에, 나선형상 또는 동심원형상으로 배치된 홈부, 홈간격부, 또는 홈부 및 홈간격부에 배치되어 복수의 세그먼트로 분할된 데이터기록영역과, 데이터기록영역의 사이에 배치되어 1쌍의 워블 피트를 가진 복수의 프리피트영역을 가진다.
Patent KR-20040064174-A (KR)
Title: Functional color
Inventor: SON YOUNG SUK
IPC: C09B61/00
Filed: 2003-01-09
Abstract: PURPOSE: A functional color and its preparation method are provided, to obtain a color having various functions good for the human health. CONSTITUTION: The functional color comprises a diet enzyme and/or a medicinal herbs component and a functional material. The diet enzyme is obtained by extraction or fermentation of natural materials comprising cereals, fruits, carbohydrates, cane sugar, pulp and/or alcohols. The functional material comprises animals, plants, minerals and pharmaceutical materials.
Patent KR-20040065132-A (KR)
Title: Wear for preventing insects
Inventor: YU DONG YEOL
IPC: A41D13/00
Filed: 2003-01-14
Abstract: PURPOSE: Wear for preventing insects are provided to prevent any harm to a skin by insects and to protect the skin by keeping a regular distance between a mosquito net and a human by the clothes being made of the mosquito net and including a device for expanding the clothes like a space suit. CONSTITUTION: The wear for preventing insects comprises a steel pad(1) and a rubber string/spring(4) placed in a radiation shape to keep a regular distance between the wear for preventing insects and a human body by the elasticity; and a variable elastic body attached for keeping the regular distance; the variable elastic body being returned to an original state as an external force is reduced or removed though it is mobile by the external force.
Patent KR-20030074133-A (KR)
Title: 카드 에지 커넥터
IPC: H01R12/79
Filed: 2003-01-30
Abstract: 본 발명은 카드 에지 커넥터에 관한 것이다.  카드 에지 커넥터는, 제2 회로 기판이 제1 회로 기판과 전기적으로 접속할 수 있도록, 제2 회로 기판의 삽입을 위해 제1 회로 기판에 전기적으로 접속된다.  카드 에지 커넥터의 지지 아암의 일 측면 상에 배치되는 간섭 장치에 의해, 제2 회로 기판은 카드 에지 커넥터 내부에 고정된다.  간섭 장치의 상부 측면은 제2 회로 기판의 표면보다 더 높다.  사용자가 카드 에지 커넥터로부터 제2 회로 기판을 제거하기를 원하는 경우에는, 두 개의 지지 아암들이 약간 외향으로 팽창되도록 간섭 장치에 힘이 가해져서, 제2 회로 기판을 제거할 수 있고 종래의 카드 에지 커넥터들과 관련된 지지 아암들의 자유 단부들이 쉽게 파손되는 위험도 없앨 수 있다.
Patent KR-20040070580-A (KR)
Inventor: HAN GYEONG SU
IPC: H01L21/304
Filed: 2003-02-04
Abstract: PURPOSE: A CMP apparatus having a brush for removing a hardened slurry is provided to supply stably the slurry between a wafer and a polishing pad by removing the hardened slurry from an inside of a groove of the polishing pad. CONSTITUTION: A plurality of grooves are formed on an upper side of a polishing pad(10) in order to store a slurry. A dispenser(30) is installed on a surface of the polishing pad in order to supply the slurry and ultra pure water to the surface of the polishing pad. A brush(40) for removing the hardened slurry is rotatably installed at one side of the dispenser. The brush is rotated to remove the hardened slurry from the grooves while the polishing pad rotated.
Patent KR-20030031022-A (KR)
Inventor: KIM KYOUNG TAE
IPC: H04W8/24
Filed: 2003-02-15
Abstract: PURPOSE: A termination sound downloading method of a mobile communication terminal by using an audio CD is provided to promote a consumer s purchase intent and increase CD sales by installing a termination sound download program in an audio CD to sell it to a user so that the user can execute the program on a PC to download a termination sound corresponding to music list collected in the audio CD. CONSTITUTION: A user purchases an audio CD(S201). The user installs a termination sound download program of the audio CD in a PC(S202). When the user executes the installed program(S203), an execution window of the program is displayed on the user PC and the user selects music desired to be downloaded as a termination sound from the audio CD(S204). The user inputs a phone number of a mobile communication terminal for downloading the music to a certain input window(S205). The selected music and inputted phone number are transferred to a Web server through an Internet network(S206). The Web server detects a termination sound data of the music from a database(S207), and transfers the termination sound data to the mobile communication terminal corresponding to the inputted phone number by way of a radio network(S208).
Patent KR-20040074540-A (KR)
Title: Variable gain amplifier using current mirror
Inventor: CHOI GI WON
IPC: H03G3/30
Filed: 2003-02-19
Abstract: PURPOSE: A variable gain amplifier using a current mirror is provided, which controls a gain more easily with a simple structure. CONSTITUTION: According to the variable gain amplifier including more than one common-source transistor amplifying an input signal, a current mirror circuit is connected to a source port of the common-source transistor and varies an operation point drain current of the common-source transistor according to a gain control voltage. The current mirror circuit comprises the first gain varying transistors(M25,M26,M27) comprised between the source port of the common-source transistor and a ground, and the second gain varying transistor(M28) whose gate port is connected to a gate port of the first gain varying transistor and acts as a diode, and the third gain varying transistor(M29) controlling a reference current applied to the second gain varying transistor.
Patent KR-20030074184-A (KR)
Title: 표시 장치
IPC: G09G3/30
Filed: 2003-03-04
Abstract: 표시 장치에 있어서의 전압 강하에 기인하는 화소의 휘도의 저하를 경감한다.  표시 장치(100)에 있어서, 유기 발광 소자 OLED에 전류를 공급하는 전원 공급선 Vdd의 단면적을, 휘도 데이터가 흐르는 데이터선 DL 및 주사 신호가 흐르는 주사선 SL의 단면적보다도 크게 한다.  이에 의해, 전원 공급선 Vdd의 저저항화를 도모하여, 전압 강하의 영향을 경감한다.
Patent KR-20040079089-A (KR)
Inventor: CHOI DONG UK
IPC: G03F7/16
Filed: 2003-03-06
Abstract: PURPOSE: A spin coater is provided, to allow a substrate to be transferred horizontally at a constant height irrespective of the size of a device rotating a substrate, thereby reducing the substrate transfer time. CONSTITUTION: The spin coater comprises a spin unit(100) which comprises a substrate fixing device(110) for fixing a substrate horizontally transferred at a first height(H1) from the bottom(2) by a substrate transfer device and a rotation device(120) for rotating the substrate fixing device; a height control means(600) which controls the height of the spin unit to the bottom so as to allow a second height(H2) defined by the first bottom and the substrate fixing device to be equal to the first height; and a photosensitive material supply device(300) which supplies a photosensitive material to the substrate. Preferably the height control means is a groove formed on the bottom to allow the second height to be equal to the first height.
Patent KR-20040079615-A (KR)
Inventor: SONG HO GI
IPC: H01L21/68
Filed: 2003-03-08
Abstract: PURPOSE: A load-lock chamber for semiconductor device manufacture including the sensor for position control of a wafer cassette is provided to prevent collision between an elevator or a wafer cassette and an upper part or a lower part of a main body of the load lock chamber by installing a sensor in the inside of the main body of the load lock chamber. CONSTITUTION: A wafer cassette is used for storing a wafer. A main body(200) includes a door into which the wafer cassette is inserted. An elevator(240) is installed in the inside of the main body in order to elevate the wafer cassette. A driver(250) is used for operating the elevator. A controller(260) is used for controlling the driver. The wafer cassette includes a wafer cassette position control sensor. The first sensor(220) is installed at an upper part of the inside of the main body in order to detect a rising limit of the wafer cassette. The second sensor(230) is installed at a lower part of the inside of the main body in order to detect a falling limit of the wafer cassette.
Patent KR-20030074358-A (KR)
Title: 고압 방전 램프를 점화하기 위한 회로 장치
IPC: H05B41/24
Filed: 2003-03-11
Abstract: 본 발명은 직렬 공진 회로에 의한 공진 점화(resonance ignition)를 이용하여 고압 방전 램프를 점화하기 위한 회로 장치에 관한 것이다.  본 발명에 따라 보조 점화 전극용 전압이 점화 트랜스포머에 의해 공급되고, 상기 점화 트랜스포머 내에는 직렬 공진 회로의 인덕터(L1)를 통해 전압이 공급된다.  바람직하게는 직렬 공진 회로의 인덕터(L1)가 점화 트랜스포머의 1차 권선을 형성한다.
Patent KR-20040081910-A (KR)
Inventor: KWON GYEONG AN
IPC: A47J27/088
Filed: 2003-03-17
Abstract: PURPOSE: An induction heating rice cooker is provided to improve the heat insulation of an inner pot by installing a coil base made of foamed injection materials between the inner pot and a working coil. CONSTITUTION: An induction heating rice cooker is composed of a main body, and a cover for opening/closing the main body. An inner pot(110) is detachably installed in the main body. A working coil(130) is installed at the outer circumference of the inner pot, and induction-heats the inner pot. A coil base(150) made of foamed injection materials is installed between the inner pot and the working coil, and has a fine air layer to improve the heat insulation of the inner pot.
Patent KR-20040082054-A (KR)
Inventor: JANG SEI HO
IPC: H04Q9/00
Filed: 2003-03-17
Abstract: PURPOSE: A handset having a portable multi-functional remote controller is provided to confirm transmission and receipt of a telephone and an information message while controlling information equipments such as mobile phones, PDAs, etc.. CONSTITUTION: A signal transmitting device(120) transmits electric signals transmitted from a data processor(130) of a remote control(100) to a portable information equipment or PC(Personal Computer), and transmits electric signals transmitted from the portable information equipment or PC to the data processor(130). The remote control(100) includes the data processor(130) converting the electric signals received from the portable information equipment or PC into signals which a control unit(140) of the remote control(100) can process and converting electric signals received from the control unit(140) into signals appropriate for equipments, a key input unit(150) receiving a command of a user, and the control unit(140) processing the signals transmitted from the data processor(130) and a microphone(180) to transmit the processed signals to the data processor(130) and an earphone(170). The microphone(180) converts external sound signals into electric signals to transmit the electric signals to the control unit(140). The earphone(170) converts the electric signals into sound signals.
Patent KR-20040085740-A (KR)
Inventor: MYUNG DAE JIN
IPC: G09G3/296
Filed: 2003-04-01
Abstract: PURPOSE: A method for diffusing an error of a plasma display panel and an apparatus thereof are provided to prevent the generation of an error diffusion pattern. CONSTITUTION: An error filter(76) detects an error value of input data. An error value aligner(81) changes a position of the error value with a constant period. A line memory(77) stores the error value from the error value aligner and outputs the stored error value. And adders(71,72,73,74) add the error value from the line memory and the input data.
Patent KR-20040087046-A (KR)
Inventor: KOO JA SEUNG
IPC: G11C5/14
Filed: 2003-04-04
Abstract: PURPOSE: An internal voltage generation circuit is provided to improve the performance of the internal voltage generation circuit by preventing the timing and level change of the internal voltage generation circuit. CONSTITUTION: An internal voltage generation circuit includes a comparison circuit(30), an output driving circuit(32) and a controlling circuit(31). The comparison circuit(30) compares the target voltage(VREF) with the output voltage(Vout) feedbacked from the output terminal. The comparison circuit(30) outputs a first level if the output voltage(Vout) is higher than the target voltage(VREF), and it outputs a second level if the output voltage(Vout) is lower than the target voltage(VREF). The output driving circuit(32) is connected between the output terminal and the first voltage terminal. The output driving circuit(32) is provided with a first output transistor(P0) for inputting the output of the comparison circuit(30) to the gate and a second output transistor(N4) connected between the output terminal and the second voltage terminal has the output terminal with the first output transistor(P0) in common . The controlling circuit(31) is connected between the output of the comparison circuit(30) and the gate of the second output transistor(N4). The controlling circuit(31) controls the output voltage by switching the second output transistor(N4) based on the on/off of the control signal, thereby approaching the output voltage(Vout) to the target voltage(VREF).