baber/WOPTO huggingface dataset:
Patent KR-20010065541-A (KR)
Inventor: SON YOUNG SUK
IPC: G07F11/00
Filed: 1999-12-29
Abstract: PURPOSE: A mung-bean pancake vending machine for conveniently providing various kinds of mung-bean pancake to consumers at a site adjacent to one's residence in order to meet various tastes of consumers. CONSTITUTION: When a consumer pushes a selection button, a withdrawing means (18) is rotated so that a plate (22) installed movably at the lower part of a mung-bean pancake receiving chamber (26) for preventing discharge of the mung-bean pancake is opened. Right after discharging the mung-bean pancake corresponding to cash input, a solenoid valve (21) regulates an interrupter (24) to exactly control the number of mung-bean pancake to be vented. In the case that the bottom side of a casing (25) is closed with upwardly drawing the plate (22), the solenoid valve operated by electric force draws the interrupter so that the mung-bean pancake is placed between the interrupter (24) and the plate (22) for the next vent.
Patent KR-20010059814-A (KR)
Inventor: JUNG YEON SU
IPC: B60J10/08
Filed: 1999-12-30
Abstract: PURPOSE: A door weather strip fixing structure prevents deterioration of door sealing so as to hinder dust and noise from flowing in a car. CONSTITUTION: An engaging clip(30) fixed to a door panel(10) to the inner side direction of a weather strip(20) is connected with the inner side wall surface of the weather strip(20). The door weather strip fixing structure with the engaging clip(30) connecting the weather strip(20) with the door panel(10) to the direction of the inner side thereof so as to prevent the weather strip(20) from being turned inside out when opening or closing a door and as a consequence deterioration of door sealing thereby hindering dust and noise from flowing in a car.
Patent KR-20000017968-A (KR)
Inventor: MOON SANG GON
IPC: B44C1/00
Filed: 1999-12-31
Abstract: PURPOSE: A color rice-straw decoration material is provided to use with itself after coloring rice-straw, also to present various atmospheres by making as a straw rope, also to use as decoration material on a ceiling, on a wall body or on a floor, also to decorate by making as a frame. CONSTITUTION: A production method of color rice-straw decoration material has the steps of: mixing water in a container for containing water and dyes of needed color for coloring and 1¯5% (compared to water) of formalin for preventing rotting; soaking a straw rope or rice-straw; heating at 40¯50 deg.C for 30 minutes; coloring with the color wanted; producing as decoration material of a ceiling, a wall body, a floor and a frame.
Patent KR-20000023730-A (KR)
Inventor: PLUNKET MARK R
IPC: B25B5/10
Filed: 1999-01-12
Abstract: PURPOSE: A clamping device is provided to temporarily clamp a working member to promote a fixing work, and to approach and remove only one side of the working member. CONSTITUTION: A clamping tool(10) is assembled with a pair of working members(12,14) equipped with arranged bores(13,15). The clamping tool(10) contains an extended pin member equipped a penetrating bore(18) extended toward a shaft or a supporting shaft(16). Slots(22,22') have a width(W1) to penetrate. The clamping tool(10) contains a rod(30) of operating device having a uniform diameter and having the size accepted into the penetrating bore(18) of the supporting shaft(16) with a minute gap. An extended knob member(34) is fixed in a spiral unit(32) or the rod of operating device(30) to be able to screw. The knob member(34) is fixed the rotation by adding plastic glue. A setscrew(38) extended to a spinning direction is accepted in an outer end(26) of the supporting shaft(16) in a groove for preventing the rotation(36) extended toward the shaft. Thereby the relative rotation is prevented between the supporting shaft(16) and the rod of operating device(30) and the relative movement toward the shaft is permitted at the same time.
Patent KR-20000035827-A (KR)
Inventor: POTT EKKEHARD
IPC: F01N3/08
Filed: 1997-09-25
Abstract: PURPOSE: Object of the invention is to provide a method and arrangement for exhaust emission control having an NOx accumulator which has a high affinity for NOx in the exhaust gases and/or a high conversion ability for hydrocarbon regeneration. CONSTITUTION: NOx conversion of exhaust gases from lean mixture engines such as Diesel engines is improved by providing a catalytic converter having three zones, the first zone containing an NOx storage material on a gamma -aluminum oxide layer, the second zone having a layer with a noble metal, and the third zone containing an oxygen storage layer.
Patent KR-20010029496-A (KR)
IPC: G01N13/02
Filed: 1997-09-12
Abstract: The object of the invention is a device for measuring the surface pressure of a film formed at the interface of a liquid and gaseous phase, the device comprising a detector means and a sensor means. The detector means comprises a light source and a position-sensitive detector, the active surface of which is situated in the light beam of the light source, and the sensor means comprises a sensor which can be brought into contact with the film to be measured, and a shading means which, in correspondence with the force applied to the sensor by the film, moves in the light beam between the active surface of the detector and the light source.
Patent KR-20000068805-A (KR)
Title: 자기치료기용 전자석, 자기치료기용 코일 및 자기치료기
Filed: 1998-07-28
Abstract: 코어의 자극면에서 멀리 떨어진 장소에서도, 자속밀도가 급속히 감쇠하는 것을 방지하고, 인체의 내부에 있더라도 충분한 진통효과를 발현시키는 자기치료기용 전자석, 자기치료기용 코일 및 자기치료기를 제공하는 것을 목적으로 한다. 
     제 1 중공부를 갖는 통형상의 제 1코어(1)와, 제 1코어(1)의 외측에 감아 회전되고, 교류전류, 상기 교류전류를 정류한 전류 또는 펄스를 갖는 전류가 통전되는 것에 의해 제 1 자계를 발생시키는 제 1 코일(3)로 이루어지는 자기치료기용 전자석이다.
Patent KR-20000062370-A (KR)
Title: Composite zirconium-cerium oxide, process for the preparation thereof, and cocatalyst for cleaning exhaust gas
Inventor: SHIGERU AOZASA
IPC: B01D53/94
Filed: 1997-12-24
Abstract: A composite zirconium-cerium oxide exhibiting excellent heat resistance and being capable of retaining its high specific surface area even when used under high-temperature conditions, which comprises zirconium and cerium at a weight ratio ranging from 51:49 to 95:5 in terms of zirconium oxide and ceric oxide, exhibits a specific surface area of 50 m2/g or above, and can exhibit a specific surface area of 20 m2/g or above even after 6-hour thermal treatment at 1100 °C; a process for the preparation thereof; and a cocatalyst for cleaning exhaust gas, prepared by the use of the composite oxide.
Patent KR-20000069832-A (KR)
Title: 피부 또는 머리카락 강화 조성물
IPC: A61K8/30
Filed: 1997-01-09
Abstract: 본 발명은 (A) 피부-처리 화합물 또는 머리카락-처리 화합물 ; (B) 하기식을 갖는 강화제 
     
       
     
     여기에서 : X와 Y는 산소, 황 또는 Y가 이미노기일 때 X는 이미노기이고 Y가 황일때 X는 황 또는 이미노기인 조건부로 구조=N-R의 이미노기이고 ; A는 X와 Y가 정의되는 구조 를 갖는 기이고 ; m과 n은 1-20의 값을 갖는 정수이고 m+n의 합계는 25보다 크지 않고 ; p는 O 또는 1의 값을 갖는 정수이고 ; q는 0 또는 1의 값을 갖는 정수이고 ; r은 0 또는 1의 값을 갖는 정수이고 ; R은 수소 또는 1-6개의 탄소원자를 갖는 알킬기이고 직쇄 또는 가지쇄이고 ; p, q 및 r이 0의 값이고 Y는 산소일 때 m+n은 최소한 11이고 ; (C) 캐리어 ; 및 임의적으로 (D) 화장품 첨가제를 포함하는 조성물과 피부 또는 머리카락의 질을 강화시키기 위한 이의 용도에 관한 것이다.
Patent KR-20010005671-A (KR)
IPC: D06L4/75
Filed: 1998-03-14
Abstract: 본 발명은 화학식 1의 신규한 화합물을 제공한다. 
     화학식 1 
     
       
     
     위의 화학식 1에서, 
     X는 O 또는 바람직하게는 NH이고, 
     M은 수소, 알칼리 금속 원자, 암모늄, 또는 아민으로부터 형성된 양이온이며, 
     R 1 은 각각 독립적으로 아미노 그룹에서 수소원자가 제거된 아미노산 잔기이고, 
     n은 1 또는 2이며, 
     R 2 는 각각 독립적으로 수소, C 1 -C 3 알킬, 할로겐, 시아노, COOR(여기서, R은 수소 또는 C 1 -C 3 알킬이다), CONH-R(여기서, R은 앞에서 정의한 바와 같다), SO 2 NH-R(여기서, R은 앞에서 정의한 바와 같다), NH-COR(여기서, R은 앞에서 정의한 바와 같다) 또는 SO 3 M(여기서, M은 앞에서 정의한 바와 같다)이거나, 
     n이 1인 경우, R 2 는 CO-R 3 (여기서, R 3 은 C 1 -C 3 알킬 또는 페닐이다)일 수 있고, 단 
     a) X가 NH이고 n이 1이며 R 2 가 SO 3 M(여기서, M은 위에서 정의한 바와 같다)이거나, 
     b) X가 NH이고 n이 2이며 하나의 R 2 가 SO 3 M(여기서, M은 위에서 정의한 바와 같다)이고 다른 R 2 가 수소, 메틸 또는 할로겐이거나, 
     c) X가 NH이고 n이 1이며 R 1 이 H 글리신이고 R 2 가 수소 또는 CO 2 H이거나, 
     X가 NH이고 n이 2이며 R 2 가 각각 SO 3 M(여기서, M은 위에서 정의한 바와 같고, SO 3 M 그룹은 페닐 환의 2위치와 5위치에 존재한다)이고 R 1 이 D,L-알라닌, L-발린, L-로이신, L-이소로이신, L-트레오닌, L-아스파르트산, L-글루탐산, L-페닐알라닌, L-프롤린, D,L-메티오닌 또는 글리신인 화합물은 제외된다. 
     대부분의 신규한 그룹인 4,4'-디아미노스틸벤-2,2'-디설폰산 화합물은 특히 종이용 형광증백제로서 유용하다.
Patent KR-20010012722-A (KR)
Title: 가스절연기기의 부분방전 검출장치
IPC: G01R31/12
Filed: 1997-05-21
Abstract: 가스절연기기의 내부이상시에 발생하는 부분방전에 기인하는 전자파를 콤팩트하게 광대역, 고감도의 안테나를 사용하여 검출한다. 
     가스절연기기의 금속용기(3)내에 반원판을 평면상에 2 매 조합시켜 구성된 원형의 안테나수신부(4)에 의하여 부분방전의 전자파를 광대역 또한 고감도로 검출한다.  검출한 신호는 동축 밀봉단자(7) 및 동축 케이블(8)을 통하여 측정장치(10)로 측정된다.  또 반원판의 안테나부는 면적을 크게 취하고 있기 때문에 전위측정부와의 정전용량을 크게 취할 수 있어 고감도의 전위측정도 가능하게 되어 있다.
Patent KR-20010013287-A (KR)
Inventor: HUNDT HARALD
IPC: H01F17/00
Filed: 1998-06-02
Abstract: The invention relates to a extra-flat miniaturized inductive component comprising a magnetic core (5) made of a soft magnetic material, a substrate (1) with conductor strips (6) and through connections. The conductor strips (6) and connections running through the substrate (1) form part of the coils of a winding. The other part of the winding is formed by wires on the upper surface (3) of the substrate (1) which are bonded to metal pads (8) on the ends (7) of the conductor strips (6).
Patent KR-20010013941-A (KR)
Title: 고주파 집적회로용 기판
IPC: H01L29/32
Filed: 1998-06-17
Abstract: 실리콘에 기초한 실리콘 기판 재료는 집적회로가 설치될 상부층(7)으로부터 기판 재료의 벌크를 격리하는 반절연 내부층(5)을 구비한다. 상기 반절연층은 주변 입자 주위에 발생된 공핍 영역이 겹치도록 쇼트키 장벽 또는 pn 헤테로 장벽을 갖는 서브미크론 입자를 발생하고, 그 입자를 분배함에 의해 만들어진다. 상기 입자들은 실리콘 재료에서 전하 캐리어를 공핍시킬 것이다. 상기 기판 재료는 표준 실리콘 처리방법을 이용하여 처리될 수 있고, 집적회로를 고주파에 적합하게 제조할 수 있다. 실리콘 기판은 실리콘 웨이퍼(1)에서 코발트와 같은 금속을 스퍼터링한 다음, 어닐링 처리에 의해 상기 스퍼터링된 코발트 원자를 실리사이드함으로써 만들어진다. 바닥면에 실리콘 이산화물층(13)을 갖는 상기 실리콘 웨이퍼(11)는 스퍼터링층에 본딩된다. 최종적으로, 상기 상부 웨이퍼(11)는 부품 제조에 필요한 공정단계에 적합한 층 두께를 제공하기 위하여 얇아진다.
Patent KR-20010020615-A (KR)
Title: 피복제품 및 그의 제조방법
IPC: C04B41/89
Filed: 1999-04-27
Abstract: 본 발명에 따르는 제품은 실리콘-함유 기판 및 개질된 멀라이트 피막을 포함한다.  개질된 멀라이트 피막은 멀라이트, 및 개질된 멀라이트 피막에서 균열을 감소시키는 개질화 성분을 포함한다.  이러한 제품은 개질된 멀라이트 피막에 피복된 열 차단 피막을 추가로 포함할 수 있다.  개질된 멀라이트 피막은 외부 환경/열 차단 피막과 실리콘-함유 기판 사이에서 결합 피막으로서 작용한다.  제품의 제조방법으로, 실리콘-함유 기판을 형성하고 개질된 멀라이트 피막을 피복한다.  개질된 멀라이트 피막은 멀라이트, 및 개질된 멀라이트 피막에서 균열을 감소시키는 개질화제 성분을 포함한다.
Patent KR-20010069163-A (KR)
Title: Method for allocate channelization code of common packet channel
Inventor: LEE YEONG DAE
IPC: H04B7/26
Filed: 2000-01-14
Abstract: PURPOSE: A method for assigning a channeling code of a CPCH(Common Packet Channel) is provided to map a signature of a CA-AICH(Channel Assignment Acquisition Indication Channel) and an OVSF(Orthogonal Variable Spreading Factor). CONSTITUTION: A node number for being used in an optional SF(Spreading Factor) is measured. If the measured node number is less than a signature number of a CA-AICH(Channel Assignment Acquisition Indication Channel), the first SF having a node number of a specific range is selected. The selected first SF maps a part of the signature to a part of the node. The second SF, which is connected on nodes not mapped in the selected first SF and larger than the selected first SF, is selected. The second SF maps remaining signatures not mapped.
Patent KR-20010076060-A (KR)
Inventor: KWON HYUK CHUL
IPC: H04B7/26
Filed: 2000-01-24
Abstract: PURPOSE: A method for transmitting user information by one-touch during the use of a mobile telephone is provided to transmit personal information between users during the use of the mobile telephone and automatically store and manage personal information. CONSTITUTION: A personal information management box is installed in a mobile telephone terminal for storing and managing a name, a telephone number, and an E-mail address of a user. A shortening button is previously set up during using a mobile telephone for transmitting personal information. A personal information transmission button of a mobile telephone terminal is inputted for the telephone number, the E-mail address and the user name of the personal information management box when informing the telephone number and the E-mail address to an object during using the mobile telephone. Transmitted personal information is stored in a telephone management box or a message box of the mobile telephone box of a conversation object. Personal information temporarily stored in the message box is stored in a telephone management box. Personal information stored in the telephone management box is always searched and identified.
Patent KR-20000036327-A (KR)
Inventor: YOO CHIN WOO
IPC: G06F12/00
Filed: 2000-01-27
Abstract: PURPOSE: A method for pre-browsing a web document is provided to have a user see content of the linked web document without leaving the uniform resource location(URL) presently being displayed in an address input window of a web browser, by showing the web documents pre-fetched into a client system. CONSTITUTION: A method for pre-browsing a web document comprises the steps of expressing a web page on a web browser and pre-fetching a web document linked in links embedded in a web page on a web browser of a client system before a request of the user, so as to make the web document become a status of being capable of showing in real time.
Patent KR-20010076841-A (KR)
Title: Variable Length Coding method and device therefor
Inventor: CHOI BYEONG SEON
IPC: H04N19/196
Filed: 2000-01-28
Abstract: PURPOSE: A method for coding variable field and a device the same are provided to reduce bit generation quantity in encoding an image of same quality by making a mapping relation of bit pattern of a symbol actively variable according to generation statistics of the symbol. CONSTITUTION: A first process(210) selects an appointed macro block from macro blocks prior to a macro block to code in a frame currently. A second process(212) analyzes a generation statistics of a symbol about the selected macro block. A third process(214) resets a mapping relation according to the analyzed generation statistics of the symbol. A fourth process(216) performs a variable field coding about the current macro block according to the reset mapping relation.
Patent KR-20010077315-A (KR)
Title: A System to Generate Various Formed Problems
Inventor: LEE JAE JOUNG
Filed: 2000-02-01
Abstract: PURPOSE: The system for making the various questions is provided to achieve the trustable and effective education by making the equalized questions on demand and evaluating the test result. CONSTITUTION: The system comprises a question information processor(8), a correct answer generator(10), and a test evaluation part(12). A question producer inputs question information(6) and a standard information(7) about making questions on an own computer screen via the Internet. The question information processor analyzes and converts the question information and the standard information about making questions, and stores to DB(9). The correct answer generator makes various questions by the question information and the standard information about making questions, creates the correct answer of the question, and displays the test page(11) on the computer screen of a learner. The test evaluation part compares the correct answer with the answer sheet of the learner, scores and evaluates the test, and sends the test result(13) back to the computer of the learner.
Patent KR-20010081481-A (KR)
Title: Method for Electronic Commerce Based on Individual Home Page
Inventor: CHOI YUN SEOK
Filed: 2000-02-15
Abstract: PURPOSE: An electronic commerce service method based on an individual homepage is provided to activate an electronic commerce by enabling an individual operator who doesn't secure a special web site for the electronic commerce to easily perform a service related to the electronic commerce. CONSTITUTION: A member registered in a service which provides a space for an individual homepage on a web selects a function for electronic commerce presented in the service. A member registered in the individual homepage who selected the function for the electronic commerce selects and displays products to be displayed on the homepage from information on products constructed by the service. In case that a purchaser wants to purchase a product displayed, mileages are provided to the seller.
Patent KR-20010081829-A (KR)
Title: Method for inform advanced caller voice message of PABX
Inventor: PARK SEOK HONG
IPC: H04M3/42
Filed: 2000-02-19
Abstract: PURPOSE: An enhanced caller voice message information method in a private exchange is provided to deliver various information to a called subscriber by voice, as well as a caller's name, and to switch over a call so that it can be terminated only by a ring in case that the called subscriber doesn't want to receive the caller's voice information. CONSTITUTION: If a call is received from a calling subscriber, a private exchange searches for a termination extension and confirms the ring type of the destination extension(S10). The exchange judges whether the called subscriber wants to receive a voice message service(S20). If the called subscriber wants to receive the voice message service, the exchange judges whether the call destination signal contains caller information(S40). In case that the call destination signal contains caller information, the exchange searches for a name and a voice message number corresponding to caller information(S60). If the voice message number exists, the exchange judges whether the name and a voice message exist(S70). If the name and the voice message exist, the exchange judges whether the voice message is to be sent(S80). If the message is sent, the exchange displays the name on the LCD module of the called subscriber's terminal(S100). The exchange confirms whether the caller is valid for the service(S110). Then the exchange combines the extension name and the caller name with a common message(S120). If message combination is completed, the exchange sends the combine voice message to the called subscriber's terminal(S130).
Patent KR-20010087486-A (KR)
Inventor: CHO GYU UNG
IPC: H01M10/0567
Filed: 2000-03-07
Abstract: PURPOSE: A lithium secondary battery is provided, to improve the binding power between electrodes and a separator, thereby inhibiting the swelling of a battery when it is placed at a high temperature. CONSTITUTION: The lithium secondary battery is such that it comprises a cathode comprising an oxide of lithium-containing metal; an anode comprising metal lithium, lithium alloy or carbon material; a separator which is placed between the cathode and the anode; and an organic electrolytic liquid comprising a nonaqueous organic solvent and lithium salt, and it is prepared by adding a thermosetting monomer or oligomer to the organic electrolytic liquid for improving the binding power among the cathode, the anode and the separator, and polymerizing and thermosetting it. Preferably the thermosetting monomer is selected from the group consisting of an acrylate-based monomer, an acrylamide-based monomer and divinyl benzene, and the thermosetting oligomer is selected from the group consisting of an acrylate-based oligomer and an acrylamide-based oligomer.
Patent KR-20000036568-A (KR)
Inventor: SEO JAE UK
Filed: 2000-03-22
Abstract: PURPOSE: A method for marketing goods using a communication network is provided to have a purchaser who wants to purchase goods in bulk, purchase a plurality of goods with ease, by using a communication network. CONSTITUTION: A method for marketing goods using a communication network includes three steps. A first step is to receive a user authenticating information including an identification and a secret number of the user. A second step to confirm that the user is a supplier based on the received information. A third step is to limit volume of information the user can read while approved to connect to the communication network.
Patent KR-20010090358-A (KR)
Title: A twisting process of preparing for the tire-cord yarn
Inventor: PARK HAN YONG
IPC: D02G3/48
Filed: 2000-03-25
Abstract: PURPOSE: A twisting method of a grey yarn for a tire cord is provided, which is characterized by decreasing chewing or winding of the grey yarn unwound from a bobbin for feeding into a guide roller(2) or an inner yarn tensioner(3) although rotation velocity of the twisting machine is increased, preventing over feeding or jumping of a grey yarn, increasing full-tubing ratio to at least 99, increasing production efficiency owing to increasing rotation velocity and decreasing entanglement of the grey yarn. CONSTITUTION: The twisting method of the grey yarn is comprised of: twisting one grey yarn supplied from a bobbin(A) and one grey yarn supplied from a bobbin(B) through the guide roller(2) and the inner yarn tensioner(3) on a cord regulator(3); passing a capstan(5); and winding on a winding bobbin(C). The twisting machine is comprised of: a grey yarn guiding hole which is formed on the center of the bobbin cover plate(1), guiding from the bobbin(B) to feed the grey yarn to the upper part of the bobbin cover plate(1); a supporting plate of a grey yarn guide installed in front of the guide roller(2) and a punched grey yarn guide; the grey yarn guide supplying the grey yarn to the center of the guide roller(2); and a fixing part fixing the bobbin cover plate(1) to main body of the guide roller(2).
Patent KR-20000071494-A (KR)
Title: 통화자 특정 음성 식별자 및 통화 통지를 가진 자동주소록 엔트리를 용이하게 하기 위한 시스템 및 방법
IPC: H04M1/2745
Filed: 2000-03-28
Abstract: 본 발명은 양방향 이동 통신장치가 상주 주소록 내의 엔트리들은 자동적으로 갱신 및 사용할 수 있도록 하는 시스템 및 방법에 관한 것으로, 여기에서 엔트리들은 통화자 및 관련 정보(예를 들면, 자동 번호 식별(ANI) 정보)로부터의 개인화 인사말을 포함한다. 서비스된 장치와의 통화는 통화 관리자에 의해 인터셉트 및 처리된다. 통화 관리자는 통화로부터 ANI 정보를 추출하고, 통화된 이동장치가 통화자에 대한 이전의 주소록 엔트리를 가지고 있는지를 판단한다. 통화자가 주소록 엔트리를 가지고 있지 않다고 판단되면, 통화된 이동장치와 결합된 프록시 서버 장치에 ANI 정보를 기록 및 발송되는 개인화 인사말을 제공하도록 통화자에게 프롬프트(prompt)한다. 상기에 설명된 처리과정이 완성되면, 통화된 장치 및 통화하는 장치가 연결된다(즉, 음성 통신 채널이 형성된다). 프록시 서버 장치는 수신된 개인화 청취가능 인사말 및 관련된 정보를 처리하고 그것을 데이터 통신 채널을 통하여 목적지 이동장치에 발송한다. 기 존재하는 주소록 엔트리가 있다고 판단되면, 통화된 장치 및 통화하는 장치는 더 이상의 처리과정 없이 연결된다.
Patent KR-20010094529-A (KR)
Inventor: KIM GYU HYEON
IPC: H03L7/07
Filed: 2000-03-31
Abstract: PURPOSE: A delay locked loop and a delay locked method correcting a duty cycle of a clock signal are provided, which generate an internal clock signal with a low jitter, and generate a jitter included in the internal clock signal. CONSTITUTION: A delay locked loop circuit(321) comprises the first delay locked loop circuit(331), the second delay locked loop circuit(332), a waveform mixer(351), a compensation delay(341) and inverters(361,362). A duty cycle corrector(311) generates an output signal(Clk_dcc) by correcting a duty cycle of an external clock signal(Clk_ext). The delay locked loop circuit inputs the external clock signal and the output signal of the duty cycle corrector and a feedback clock signal(Clk_fd) and generates an internal clock signal. The first and the second delay locked loop circuit are connected in parallel each other, and the duty cycle of the external clock signal is corrected by the first and the second delay locked loop circuit. The first delay locked loop circuit inputs the external clock signal and the output signal of the duty cycle corrector and the feedback clock signal and generates the first clock signal(Clk_r). The compensation delay generates a feedback clock signal by delaying the internal clock signal, and the inverters output signals(Clk_dccb,Clk_fbb) by inverting the output signal of the duty cycle corrector and the feedback clock signal. The second delay locked loop circuit generates the second clock signal(Clk_f). And the waveform mixer inputs the first and the second clock signal and generates an internal clock signal(Clk_int).