baber/WOPTO huggingface dataset:
Patent KR-20000028285-A (KR)
Title: Method for mounting and controlling of object in furnace when placing large amount of fine powdered coal
Inventor: KIM JAE SIK
IPC: C21B5/00
Filed: 1998-10-30
Abstract: PURPOSE: Amounting method is provided to reduce input coke amount into the center, to keep stability of a furnace and to smoothly keep central unit gas flow by smoothly settling discharging amount of mineral to regularly keep central O/C(the rate of mineral and coke) distribution. CONSTITUTION: A method contains steps of controlling the opening of an adjusting face(21) for charging amount of mineral to first open the adjusting face as much as the set opening when reaching the tilting angle of the set notch, and of controlling the opening of the adjusting face as much as the opening less than the first opening for reduction of charged amount of mineral to regularly keep central O/C distribution when reaching the set tilting angle of charging an object into a central unit. A charging object position pursuit device(16) installed in a blast furnace senses that the charging object reaches a standard line(14), and sends a signal to a controller. Therefore, the controller adjusts the adjusting face to charge the object. At that time, a turning chute(22) is in the state of reaching the tilting angle of the set notch.
Patent KR-20000028462-A (KR)
Title: Refrigerator having two ventilators
Inventor: LEE JEONG WAN
IPC: F25D17/06
Filed: 1998-10-31
Abstract: PURPOSE: A refrigerator having two ventilators is provided to prevent vibration from being generated as ventilators are worked and to stably ventilate the sufficient amount of cold air to a refrigerating chamber by installing two ventilators for freezing and refrigerating chambers in the same direction. CONSTITUTION: A ventilator(100) for a refrigerating chamber is worked to ventilate cold air formed in a cooler(40) to an inlet(142) of an induction pipe in a bulk board(14) when ventilating cold air to a refrigerating chamber. The ventilated cold air is vented to an outlet(144) of the induction pipe by converting the direction after the cold air is crashed into the inside(120) of the induction pipe. Then, the cold air is used to control the temperature of the refrigerating chamber by being fed to the chamber along a feed pipe(160). Therefore, the refrigerator is able to stably ventilate the sufficient amount of cold air to the refrigerating chamber by installing the two ventilators in the same direction with the induction pipe.
Patent KR-20000031602-A (KR)
Title: Illumination automatically adjusting apparatus for car audio system
Inventor: PARK DAE HO
IPC: G11B33/12
Filed: 1998-11-07
Abstract: PURPOSE: An illumination automatically adjusting apparatus for car audio system is provided to control automatically the illumination of a lamp for back light in the liquid crystal display of a car audio. CONSTITUTION: An illumination automatic adjustment apparatus for car audio system is composed of a liquid crystal display(10), a lamp for back light(20), a first power supplier(30), a second power supplier(40), a microcomputer(50) and a key input part(60). The first power supplier(30) supplies a first power(Acc) to the lamp for back light(20) in response to the peripheral brightness of the exterior of a car audio and a control signal. The second power supplier(40) receives the first power(Acc) and a second power(Vcc) from the car battery and supplies the first power(Acc) to the lamp(20) in response to the control signal. The key input part(60) generates a mode control signal(MCS) in response to user's key operation. The microcomputer(50) supplies the control signal to the second power supplier(40) in response to the mode control signal(MCS) from the key input part(60).
Patent KR-20000032617-A (KR)
Title: Audio synchronizing method for estimating tone quality objectively
Inventor: KIM YONG LYOL
IPC: H04L7/00
Filed: 1998-11-16
Abstract: PURPOSE: An audio synchronizing method for estimating tone quality objectively is provided to enhance a reliability to an estimation of a tone quality by being identical to a transmitting start time of an original sound and a receiving distortion sound. CONSTITUTION: A mobile module(310) transmits a DTMT tone 1 with a distance(W1 second). The DTMT tone 1 is received to a wire module(320) after a communication network delay time(W2) and is detected after W3 second. The wire module(320) detects the DTMF tone 1, and transmits a DTMF tone 2 after W4 second. The DTMF tone 2 is received to the mobile module(310) after W2 second and is detected after W5 second. A progress time of the mobile module(310) in T3 time is a time(W2+W3+W4+W2+W5+W4). A progress time of the wire module(320) in T3 time is a time(W2+W3+W4+W6).
Patent KR-20000034407-A (KR)
Title: Device for preventing movement of ferrite core in fly back transformer
Inventor: SONG YEONG SIN
IPC: H01F38/42
Filed: 1998-11-30
Abstract: PURPOSE: A device for preventing the movement of a ferrite core in an FBT(Fly Back Transformer) is provided to firmly fix the ferrite core to one side of an FBT case while preventing the movement of the ferrite core and to obtain stable inductance value of the ferrite core. CONSTITUTION: Rectangular core supporting tools(160) are integrally formed with an FBT case(110) for being installed at the upper and the lower directions of a gap fixing piece(150) for preventing distortion while combining an upper and a lower ferrite cores(130a,130b). Therefore, the both sides of the ferrite cores are firmly inserted between the core supporting tools to be fixed. Herein, the core supporting tools contain plural forcible insertion projections for fixing the ferrite cores more firmly.
Patent KR-20000039366-A (KR)
Title: Method for purifying using oxygen ion
Inventor: CHOI DONG MIN
IPC: C02F1/48
Filed: 1998-12-12
Abstract: PURPOSE: A purifying method using oxygen ion is provided, which is characterized in that oxygen ion which aerated through a lot of holes flows upward, and contaminants are disintegrated by magnetic force and supersonic waves. CONSTITUTION: An aeration device(1) is installed to supply oxygen ion through a lot of holes(4), so wastewater is oxidized and flows upward. Rotating fans(12,13) are installed to change the flowing of wastewater. Several magnetizing plates(17,20) are installed between the rotating fans(12,13) to generate magnetism, and supersonic wave generators(23,24) are installed. Wastewater is passed through the magnetizing plates and supersonic generators, so cohesion of molecules is broken. The purifying devices(10) are installed at various places of aeration device(1).
Patent KR-20000041599-A (KR)
Title: Apparatus for generating ozone for refrigerator
Inventor: JUN DUK GU
IPC: A01L9/00
Filed: 1998-12-23
Abstract: PURPOSE: An apparatus for generating ozone for a refrigerator is provided to control an amount of generated ozone by controlling a period of applying or shutting off a corona initializing voltage with relation to discharge and earth electrodes. CONSTITUTION: An apparatus for generating ozone for a refrigerator(100) includes a high voltage circuit part(110) for generating a high voltage by raising or multiplying an input voltage, a discharge electrode(120) in the shape of needle to be applied with a cathode voltage of the high voltage, and an earth electrode(130) in the shape of grid being separated from the discharge electrode with a predetermined distance and applied with an anode voltage of the high voltage, wherein the anode corona discharge is induced in the discharge electrode and ozone is generated between the discharge electrode and the earth electrode forming an atmospheric current toward the earth electrode, wherein the high voltage circuit part includes an oscillation part for oscillating with a predetermined frequency by receiving a DC voltage, a voltage raising part for raising a voltage of the oscillation part, and a voltage multiplying part for multiplying and rectifying a voltage output from the voltage raising part to output the high voltage.
Patent KR-20000043516-A (KR)
Title: Display system
Inventor: KIM HAK YONG
IPC: G09G5/00
Filed: 1998-12-29
Abstract: PURPOSE: A display system is provided to enable an announcer to conduct a presentation effectively by embedding a pont bar generator in the display system. CONSTITUTION: A display system comprises an external image signal processor(110), a display(120), a pont bar generator(130), a signal mixer(140), a pont bar control remote controller(150), a remote controller reception part(160), a micro computer(170), a display driving part(180). The external image signal processor(110) processes an external image signal to generate horizontal and vertical synchronous signals(Hsync,Vsync). The pont bar control remote controller(150) outputs pont bar attribution and position information in a wireless signal, and the remote controller reception part(160) receives the pont bar attribution and position information to transfer the received pont bar attribution and position information to the micro computer(170). The micro computer(170) drives the pont bar generator(130) when the pont bar attribution and position information is received, and the pont bar generator(130) generates a pont bar signal corresponding to the received pont bar attribution and position information in synchronization with the horizontal and vertical synchronous signals(Hsync,Vsync). The signal mixer(140) mixes the external image signal from the external image signal processor(110) and the pont bar signal from the pont bar generator(130) to enable the display driving part(180).
Patent KR-20000045158-A (KR)
Title: Push-pull power amplifier
Inventor: LEE WON IL
IPC: H03F3/26
Filed: 1998-12-30
Abstract: PURPOSE: A push-pull power amplifier is provided to prevent a fluctuation of a bias voltage according to a variation of a temperature and a deterioration of a device. CONSTITUTION: A push-pull power amplifier comprises an NPN transistor(Q1) and a PNP transistor(Q2). A first digital-to-analog converter(DAC)(100) outputs a voltage(VBP) to the base terminal of the NPN transistor(Q1) according to a bit rate(A) when a select signal is inputted(Cs). A second DAC(102) outputs a current(ICP) according to a bit rate(B) when the select signal(Cs) is inputted. A bias voltage value setting part(104) inputs a predetermined quantization value(N) of 2N quantization values. A collector current value setting part(106) inputs a predetermined quantization value(N) of 2M quantization values. A control part(108) receives the quantization value from the bias voltage value setting part(104), and applies the select signal(Cs) and the bit rate(A) to the first DAC(100). The control part(108) receives the quantization value from the collector current value setting part(104), and applies the select signal(Cs) and the bit rate(B) to the second DAC(102).
Patent KR-20000045448-A (KR)
Title: Method for forming isolation region of semiconductor device
Inventor: KIM JONG GUK
IPC: H01L21/76
Filed: 1998-12-30
Abstract: PURPOSE: A method for forming an isolation region of a semiconductor device is provided to improve the operating quality and the productivity of the semiconductor device by removing an oxynitride layer formed on a nitride layer without performing a separate etching process. CONSTITUTION: A pad oxide layer(12), a nitride layer(14) and an oxynitride layer(16) are sequentially formed on a semiconductor substrate(10). By using a photoresist pattern(10) for a mask, the oxynitride layer(16), the nitride layer(14) and the pad oxide layer(12) on an isolation region are sequentially removed so that the semiconductor substrate(10) is exposed. Then, a trench(20) is formed by etching the exposed semiconductor substrate(10), by which the oxynitride layer(16) is also removed. The trench(20) is filled by forming an oxide layer(22) on the surface of the structure. After the oxide layer(22) formed on the nitride layer(14) is removed by a CMP process, the nitride layer(14) is removed.
Patent KR-20000046455-A (KR)
Title: Feeder for cooling water of radiator
Inventor: SIM HO CHANG
IPC: F01P11/02
Filed: 1998-12-31
Abstract: PURPOSE: A feeder for cooling water of a radiator is provided to stabilize the cooling water supply to a radiator as well as to simplify the structure by integrating a header tank with an auxiliary tank. CONSTITUTION: A cooling water in a radiator is consumed by cooling an overheated engine in driving a vehicle. The external high-pressure air is introduced through a hole(71a) when the inner pressure of the radiator is lower than the outer one. Thus, a lift member(73) falls to flow the cooling water. The lift member falls by compressing a first spring(74), and the spring is expanded to closely adhere the lift member to the second spring(75). The cooling water flows into a path(13) through the fall of the lift member and then fills the radiator as much as the consumed amount.
Patent KR-19990035895-A (KR)
Title: 동작 벡터 처리
Filed: 1997-05-14
Abstract: 출력 동작 벡터(MV')를 제공하는 방법에 있어서, 동작 벡터(MV)는 인코드된 영상 신호(MPEG)로부터 검색되며(DEC), 검색된 동작 벡터(MV)는 출력 동작 벡터(MV')를 얻기위하여 후속 후속처리된다.  상기 후속 처리는 후보 동작 벡터를 발생하는 단계(CVG), 및 상기 후보 동작 벡터와 상기 검색된 동작 벡터(MV)에 따라 상기 출력 동작 벡터(MV')를 선택하는 단계(CVS)를 포함한다.
Patent KR-19990063980-A (KR)
Title: 전류 분배형 강성 구조물을 구비한 전기적으로 가열가능한 벌집형 바디
IPC: F01N3/28
Filed: 1996-09-05
Abstract: 본 발명은, 유체가 통과할 수 있는 다수의 경로를 구비하며, 그의 종단면적 및/또는 축선 방향 길이가 미로형 및/또는 나선형으로 전기적으로 분할되어 있는 내연기관으로부터의 배기 가스를 촉매 변환시키는 전기적으로 가열가능한 벌집형 바디(1)에 관한 것으로, 벌집형 바디(1)의 둘레면(50)에는 둘 이상의 전류 분배형 강성 구조물(6,7)이 제공되어 있으며, 전류 분배형 강성 구조물이 실질적인 반쉘(half-shell)형태로 형성되어 있으며, 환형 갭(17)에 의해 관형 케이싱(20)으로부터 완전하게 분리되어 있는 각각의 전류 분배형 강성 구조물(6,7)이 방사형으로 외부 또는 내부를 향해 둘레 방향으로 연장하는 하나 이상의 칼러를 포함하는 것을 특징으로 하는 벌집형 바디에 관한 것이다.  이러한 구성은 높은 작동 하중 하에서 전류 분배형 강성 구조물(6,7)의 변형을 방지할 수 있다.
Patent KR-19990082073-A (KR)
Title: 평평한 제품의 그룹을 서로 분리시키는 방법및 장치와, 상기장치를 구비한 폴딩머신
IPC: B65H33/02
Filed: 1997-01-24
Abstract: 평평한 제품의 다발 또는 그룹(M1, M2)을 서로 분리시키는 장치는, 제품의 전진을 위한 채널(11,12)과, 상기 채널과 결합되어, 폐쇄통로를 따라서 이동가능한 복수개의 분리핑거(15,17)를 구비하고 있다.  전진채널의 각 측면에는, 한쪽이 다른쪽위에 위치하고 실질적으로 동일한 연장부를 가진 적어도 한쌍의 가이드(23,25)가 상기 폐쇄통로를 형성하기 위하여 설치되어 있다.   제품의 하나의 다발(M1)을 다음의 다발(M2)로부터 멀리 이동시키기 위하여 각쌍의 상기 첫 번째 슬라이더(19)를 상기 제 2슬라이더로부터 멀리 일시적으로 이동시키는 위상변위수단(33)이 상기 전방부의 단부에 배치되어 있다.
Patent KR-20000004986-A (KR)
Title: Method and device for controlling temperature of hot supply water
Inventor: OTTOSON ALP
IPC: F24D10/00
Filed: 1997-03-24
Abstract: PURPOSE: A device is provided to quickly and reliably control the temperature of the hot supply water heated in a heat exchanger to keep the temperature in a constant state. CONSTITUTION: A device has a flow amount control valve(4) installed on a supply line(2) controlled by a controller(6) corresponding to the signal fed from a thermo-sensor(6) placed on a second circulation circuit for the hot water supply to a heat exchanger(1). A transfer line(7) for the consumed water and an outlet line(8) for the heated consumed water are installed on the second circulation circuit. The outlet line is connected to the water supply tap(9) in a building. A branched line(10) having a circulation pump maintains the normal flow of the water through the heat exchanger.
Patent KR-20000010609-A (KR)
Title: Apparatus for performing logic and leakage current tests on a digital logic circuit
Inventor: MILLER CHARLES A
IPC: G01R31/02
Filed: 1997-01-17
Abstract: PURPOSE: An apparatus for performing logic and leakage current tests on a logic circuit device under test (DUT) is disclosed. CONSTITUTION: The apparatus includes a local module (14) for each terminal of the DUT. For performing logic tests, each local module has a driver for supplying a logic signal input to the DUT terminal, a comparator (82) for detecting the DUT output at the terminal, and a clamping circuit (22) for limiting the voltage swing at the DUT terminal during the logic test. For performing a leakage current test, each local module (14) includes a source for supplying a parametric signal to the DUT terminal. The voltage the parametric signal produces at the DUT terminal, as detected by the comparator (82) indicates the terminal's leakage current. The parametric signal source (24) and the clamping circuit (22) are connected to the DUT terminal through Schottky diodes (52, 54). During a logic test the parametric signal source(24) is isolated from the DUT terminal by reverse biasing the Schottky diodes linking the parametric signal source (24) to the DUT terminal.
Patent KR-20000065003-A (KR)
Title: 항천식및면역억제제로서의특이적인면역필린리간드
IPC: A61K31/4427
Filed: 1997-04-04
Abstract: 신규한 화학식 I의 특이적인 면역필린 리간드는 항천식 및 면역억제 활성을 갖고 약제의 제조를 위해 사용될 수 있다. 
     화학식 I
Patent KR-20000010940-A (KR)
Title: Method and board machine for manufacturing a paperboard web
Inventor: HUOVILA VESA TAPANI
IPC: D21F1/48
Filed: 1997-05-15
Abstract: PURPOSE: An improved method for manufacturing a paperboard and an improved board machine for satisfying a high condition for manufacturing the paperboard product are provided. CONSTITUTION: In order to meet higher demands for the properties of paperboard products an improved method and machine for the manufacture of paperboard are proposed according to the present invention in which a core (3) of a paperboard web is formed in a second forming unit (24) from a stock with a consistency being supplied to the fourdrinier wire (6) of a fourdrinier former carrying a back layer (2) formed previously in a first forming unit (14), from a headbox (25) for high consistency stock and being dewatered upon being enclosed between the fourdrinier wire and a top wire (26) in said second forming unit, and in which an underliner (4) is formed in a third forming unit (34) of stock with a consistency being supplied to the fourdrinier wire (6) carrying the back layer and core, from a headbox (35) for stock of low consistency. In both cases dewatering occurs under the influence of upper and lower tables (59, 60; 89, 90) in the loop of respective top wires (26; 36), said tables having slats (69, 74; 99, 104) separated by spaces (68, 75; 98, 105) and defining between them a passage through which a sandwich structure consisting of the fourdrinier wire (6), top wires (26; 36) and stock layer is conveyed and influenced alternatively by upper and lower slats so that the stock layer (3; 4) is compressed alternately from above and below, pressure pulses and shear forces thus being created in the stock layer. Furthermore, in the second forming unit for high consistency forming the stock layer (3) is kept in a fluidized state.
Patent KR-19990087839-A (KR)
Title: T임파세포로 거대분자 프로드럭을 표적 수송
IPC: C07K16/28
Filed: 1997-03-12
Abstract: T 세포내로 화학물질의 세포내 수송을 하기 위한 조성물에 있어서 수용성 고분자에 결합된 수용체-결합 및 엔도사이토시스를 유도하는 리간드로 구성된다.  리간드는 T 임파세포에 있는 수용체에 결합하고 조성물의 엔도사이토시스를 유도한다.  또한 조성물은 화학물질에 결합하고 고분자를 리간드에 결합시킬 수 있는 스페이스를 포함한다.   화학물질에는 세포독소, 핵산을 변환시키는 물질, 유전자 조절물질, 라벨, 항원, 약물 및 이와 유사한 물질을 포함한다.   적절한 수용성 고분자는 N-(2-하이드록시프로필)메타아크릴아미드(HPMA)의 혼성중합체이다  또한 조성물에는 수용성 고분자, 리포좀 및 과립자와 같은 담체를 추가로 포함한다.  in vivo 또는 in vitro로 화학물질을 운반하기 위한 조성물을 이용하는 방법에 대해서도 상술하고 있다.
Patent KR-20000011107-A (KR)
Title: Process for the treatment of particulate matter by fluidisation, and vessel with apparatus to carry out the treatment
Inventor: KEPPLINGER WERNER-LEOPOLD
IPC: C21B13/00
Filed: 1997-05-15
Abstract: PURPOSE: A process and a vessel for reduction treating particulate matters by fluidisation is required not to generate sticking or fouling and to minimize the consumption of reduction treatment gas. CONSTITUTION: Particulate matter containing iron oxide, with a wide ranging grain size distribution and a relative large content of fines, preferably with a size being 50-150 micrometer of that of the largest particle, is used in the treatment. The empty pipe flow rate of the reducing gas in the fluidised bed(2) is kept smaller than, for example 0.25-0.75 Vmin/Dmax of the flow rate required for the fluidising of the larger particles of the particulate matter, the particulate matter is held and treated in a fluidised bed (2) with the reducing gas flowing from the bottom to the top, and all the larger particles thereof move to the top with the particulate and are released from the upper part of the fluidised bed (2). The vessel comprises a cylinder-type fluidized bed section (3) for supplying and distributing a reducing gas; a corn-type upper section (9) where the empty pipe flow rate of the reducing gas is decreased homogeneously and continuously; and a calming section (15). A cyclone (21) for separating dust is placed in a cylinder-type section of the calming section (15), a recycling pipe of dust (22) from the cyclone (21) comes down vertically to be connected into the fluidized bed (2), and a gas releasing pipe (23) of the cyclone (21) is connected into a space (24) placed between a ceiling (16) and a ceiling of the vessel (17).
Patent KR-20000051670-A (KR)
Inventor: KANG JEON YOO
IPC: H03K19/00
Filed: 1999-01-25
Abstract: PURPOSE: A hysteresis circuit using band gap reference circuit is provided to supply stable DC voltage independent of thermal changes. CONSTITUTION: A hysteresis circuit using band gap reference circuit includes following steps. As constant voltage(Vcc) increases from 0, the base voltage(VB) and the emitter voltage(VE) also increase and the first and second constant current(I1,I2) run in the first and second transistors(Q1,Q2). If the level of the constant voltage(Vcc) is low, the second transistor(Q2) goes into a saturation mode with the base current since the required second constant current(I2) is not supplied and the third transistor(Q3) is turned off. If the constant voltage(Vcc) keeps increasing until I1 = I2, the second transistor(Q2) moves from saturation mode to active mode, when the third transistor(Q3) is turned on and the load operates. The turning off procedure is opposite to the turning on procedure.
Patent KR-19990045896-A (KR)
Title: 과일야채죽및그제조방법
Filed: 1999-02-06
Abstract: 본 발명은 가정에서 즐겨먹는 과일과 야채를 첨가하여 맛도 신선하고 좋으면서 영양도 골고루 섭취할 수 있도록 하는 과일야채죽 및 그 제조방법에 관한 것이다. 
     본 발명은 복숭아, 배, 감귤의 껍질과 씨를 제거하고 믹서기로 믹서하고, 토마토, 오이, 당근, 케일, 알로에를 믹서하거나 1차 가공품을 마련하고, 상기 원료를 100중량비에 대하여 복숭아퓨레 18~25%, 감귤퓨레 12~20%, 배퓨레 0.5~1.5%, 토마토퓨레 1~5%, 오이 0.5~1.5%, 당근 0.5~1.5%, 비타민-C 0.05~1.5%, 오렌지엣센스 0.11~0.18%, 누룽지엣센스 0.02~0.06%, 액상과당 5~10%, 팩턴 0.09~0.15%, 케일 0.01~0.04%, 알로에 0.01~0.04%, 화분 0.001~0.003%, 벌꿀 0.001~0.005, 나머지는 정제수로 정량하고 용기(이중 증자솥)에 넣어 교반하여 90~100℃에서 5~15분간 증자하는 공정을 특징으로 한다. 
     이에 따라 제조된 과일야채죽은 야채와 과일이 갖고 있는 다양한 영양소를 한꺼번에 음용알 수 있수 있어 영양공급에 이바지하는 바가 크며,과일과 야채로 만들어서 음용할 때 느껴지는 특유의 맛과, 다양한 영양소공급으로 영양보충이 탁월할 뿐만 아니라, 공정과정이 자동화되어 불편을 해소하면서 다량보급으로 손쉽게 즐겨 먹을 수 있도록 하고, 또한 경제성을 물론 복잡한 공정과 원료구입과정을 거치지 않고 손쉽게 식탁에서 음용할수 있어 위생적이면서 충만한 영양을 공급하고 맛을 느낄 수 있기 대문에 국민 건강복지를 이루게 하고, 농산물재배를 업으로 하는 농촌의 경제발전을 구축함과 동시에 경제유통의 활성화를 이루어 농촌의 경제 수입을 크게하는 효과가 있는 것이다.
Patent KR-20000055643-A (KR)
Inventor: LEE YEONG DEUK
IPC: H04N5/50
Filed: 1999-02-09
Abstract: PURPOSE: A method for auto channel tracking of a television is provided to reduce the number of steps which are performed at a fine tuning point so as to reduce the auto channel tracking time. CONSTITUTION: A method for auto channel tracking of a television includes following steps. At the first step(s120), an ADC(analog digital conversion) voltage is checked by moving a predetermined step to a negative direction from a fine tuning point when the auto channel tracking is operated. At the second step, the ADC voltage is compared with a first reference voltage, and a predetermined step is moved(s230) to a positive direction when the ADC voltage is higher than the first reference voltage, and the ADC voltage is compared with the reference voltage(s240). At the third step, a predetermined step is moved(s330) to a negative direction when the ADC voltage is lower than the first reference voltage, and the ADC voltage is compared with a second reference voltage(s340). At the forth step, the channel is memorized(s400) when the ADC voltage is lower than the second reference voltage.