baber/WOPTO huggingface dataset:
Patent KR-20000025332-A (KR)
Title: Apparatus for checking ball of semiconductor ball grid array material
Inventor: PARK SUNG YUL
IPC: H01L21/66
Filed: 1998-10-10
Abstract: PURPOSE: An apparatus for checking a ball of a semiconductor BGA(Ball Grid Array) material is provided to check whether a ball of a semiconductor BGA(Ball Grid Array) material is wrong through a CCD camera. CONSTITUTION: An apparatus for checking a ball of a semiconductor BGA illuminates a ball of a semiconductor BGA material from all directions through a circular illumination device using a number of LEDs. The apparatus comprises: a semiconductor BGA material; a circular illumination device(20) which is located above the semiconductor BGA material and where a circular penetration hole(1) is formed on a center part and a transparent stepped part(2) is formed on a bottom of the circular penetration hole and a number of LEDs(3) are arranged on a back surface of a vertical part of the transparent stepped part; and a CCD camera which displays the ball of the semiconductor BGA material, being installed above the circular illumination device.
Patent KR-20000026404-A (KR)
Title: System for controlling virtual reality character at real time
Inventor: SHIN DONG YOON
IPC: G06T17/00
Filed: 1998-10-20
Abstract: PURPOSE: A system for controlling a virtual reality character at real time is provided to control simply the motion of the virtual reality character without a high cost motion capture system. CONSTITUTION: A system for controlling a virtual reality character at real time comprises a CPU(1), a 1st input peripheral(2), a 2nd input peripheral(3), a 3rd input peripheral(4), a body part motion vector memory(5), a pattern motion data memory(6), a facial expression data memory(7), a work memory(8), a ROM(9), a graphic system(10) and an output peripheral(11). The input peripherals(2,3,4) includes a keyboard or a joystick. The 1st input peripheral(2) can be a keyboard whose key designates a position vector of the body parts, the 2nd input peripheral(3) whose key designates a facial expression of the character, and the 3rd input peripheral(4), for example a joystick, whose orientation designates a rotating direction and angle of body joints. The graphic system makes the graphic images by reading various data from the memories(5,6,7,8) corresponding to the designations of the input peripherals(2,3,4).
Patent KR-20000027146-A (KR)
Title: Device and method for sensing non-paper of office automating machine
Inventor: LEE CHUN HONG
IPC: B41J11/00
Filed: 1998-10-27
Abstract: PURPOSE: A device is provided to increase paper supplying efficiency by deciding if the cause is paper less or a paper jam when a supply roller does'n't supply paper to a printing unit. CONSTITUTION: A device contains a rotating shaft(22) of a supply roller(20) rotated by a stepping motor(10), a structure(24) connected to the rotating shaft, and a sensor(26) sensing the movement of the structure. The supply roller is not rotated by an overload in a paper less state, and then the sensor senses the state. However, when the signal of the sensor is normal, the device removes a jam or re-supplies paper.
Patent KR-20000031554-A (KR)
Title: Apparatus for polishing wafer
Inventor: GOH YONG LIM
IPC: H01L21/304
Filed: 1998-11-07
Abstract: PURPOSE: An apparatus for polishing a wafer is provided to prevent an air, which is generated in the vicinity of the flat zone of a wafer, between a membrane and a punched plate from being leaked. CONSTITUTION: An apparatus for polishing a wafer includes a punched plate(10,40), a membrane(20), and a clamp(30). The punched plate is that punched holes are vertically penetrated in the central part of the main body and that inner and outer rings(11a,11b), which are respectively protruded, make a concentric circle on the bottom of the main body. The membrane, which is an elastic material, accepts the rings and covers the bottom of the punched plate to prevent a leakage of an air injected via the punched holes. The clamp is to fix the membrane to the punched plate. A part(41c) of the inner ring is a straight line to prevent an air leakage in the vicinity of the flat zone.
Patent KR-19990045259-A (KR)
Title: 진공차단기와 이것에 사용되는 진공밸브 및 그 전극
Filed: 1998-11-13
Abstract: 본 발명의 목적은, 제조공정을 단축할 수 있고, 소형이고 고성능인 진공차단기와 이것에 사용하는 진공밸브 및 진공밸브용 전극을 제공하는 데에 있다. 
     본 발명은, 고정쪽 전극 및 가동쪽 전극은 서로 마주 향하는 전체면이 내화성 금속과 고도전성 금속을 가지는 합금으로 이루어지는 아크전극과, 상기 아크전극을 지지하는 고도전성 금속으로 이루어지는 전극봉을 가지며, 상기 아크전극과 전극봉은 고체상에 의한 확산접합에 의하여 일체로 형성되어 있는 것을 특징으로 하는 진공차단기와 이것에 사용하는 진공밸브와 그 전극을 제공한다.
Patent KR-20000032975-A (KR)
Title: Method for electric connection of ceramic heater of air conditioner
Inventor: CHOI BYUNG GAB
IPC: F24F13/00
Filed: 1998-11-18
Abstract: PURPOSE: A method for electric connection of ceramic heater of air conditioner is provided to conveniently add or delete ceramic heaters by constructing three ceramic heaters in one group and separately disposing such groups of ceramic heaters in several spaces separated with insulation plates. CONSTITUTION: In an electric connection method of ceramic heater of air conditioner, front, rear, right and left side fixing plates(10,20,30,40) are disposed in the shape of a case, a safety net(50) is mounted on the top parts of the fixing plates as a cover, an intermediate fixing plate(60) is mounted in the center between the right and left side fixing plates for preventing deformation of the center portion, and a plurality of ceramic heaters(70) are respectively secured in the spaces between the right and left side fixing plates and the intermediate fixing plate, wherein three ceramic heaters are electrically connected in combination, being respectively connected with R, S and T-phase of lead-in power supply in the three-phase Y electric connection manner, and six to thirty ceramic heaters are electrically connected in parallel.
Patent KR-20000034392-A (KR)
Title: Method for discriminating image mode of vcd player
Inventor: SON TAE YONG
IPC: G11B20/10
Filed: 1998-11-30
Abstract: PURPOSE: A method for discriminating image mode of VCD player is provided to improve service functions of VCD and to meet more various desires of users by sensing automatically whether a mode of image signal recorded in VCD is different from a display mode for displaying it and by displaying a guiding message according to the result. CONSTITUTION: A method for discriminating image mode of VCD player, which senses automatically whether a mode of image signal recorded in VCD is different from a display mode for displaying it and displays a guiding message according to the result, is disclosed. The method for discriminating image mode of VCD player includes step of searching a mode of image signal recorded in a disk if a key signal for playing back the disk loaded in the VCD player is inputted(203,205,209); step of displaying a warning message which means that playing back is not done normally if the mode of image signal recorded in the disk is different from a display mode of the VCD player(211,213); and step of playing back the disk after the said process of managing signals(215).
Patent KR-20000037899-A (KR)
Title: Circuit for compensating screen brightness
Inventor: KANG JOO SEONG
IPC: H04N5/57
Filed: 1998-12-03
Abstract: PURPOSE: A circuit for compensating screen brightness is provided to compensate the increase of the grid voltage according to the temperature in order to increase the display quality. CONSTITUTION: A circuit for compensating screen brightness includes a temperature compensation circuit(10). The temperature compensation circuit(10) decrease a collector voltage using increase amount of current according to the temperature of the monitor in order to maintain a voltage of the first grid(G1) at a proper value. The temperature compensation circuit(10) further includes a temperature compensation diode and a temperature compensation resistor(R1) which compensate the voltage increase of the first grid(G1)
Patent KR-19990024143-A (KR)
Title: 타격 페카
Filed: 1998-12-12
Abstract: 본 발명은 건축 콘크리트 크렉보수 기구중의 하나로서 인젝션 실린더, 페커 등 크렉부수 기구의 사용 목적과 동일한 용도로 사용하는 기구로서 특히 페커의 대체 사용가능한 기구임 
     기존의 패커는 사용하는 데 있어 크렉부위를 드릴로 뚫어서 페커를 구멍에 넣고 패커를 조임 기구로 조이고 이 다음에 재료를 주입 하였음 
     하지만 본 특허품은 콘크리트 앵커총에 넣어 콘크리트 크렉부위에 대고 쏜다음 바로 재료를 주입할 수 있음
Patent KR-19990024222-A (KR)
Title: 납골용 유품 영구보관함
Filed: 1998-12-22
Abstract: 본 발명은 장례식때 고인을 화장후 분굴을 납골당에 보관할 때 분골과 고인의 간단한 약력, 그리고 사진 등 간단한 유품을 함께 보관케하는 유품보관함에 관한 것으로 더욱 상세하게는 고인이 타계후 몇십년 또는 몇대가 흐르면 후손들의 기억에 잊혀져 버리고 특히 고인이 생전에 크고 작은 업적과 삶의 역사는 영원히 사라져 버리는 아쉬움 때문에 고인의 간단한 유품과 고인의 모습 그리고 생전의 약력 및 자손 그리고 친지들의 인적사항 등을 함께 기록하여 분골과 함께 보존케하는 납골용 유품영구보관함을 제작하는 것이다. 
     이를 위하여 본 발명은 납골용 분골함 외부상자를 도자기화하여 영구보존 하고 내부상자를 오동나무로 2단 서랍식으로 제작 하단부에는 분골을 넣고 상단부에는 고인의 행적기록과 사진 등 간단한 유품등을 넣을 수 있도록 제작하며 특히 도자기나 대리석 또는 옥으로 만든 분골함등에서 문제로 발생하는 내부 결로현상을 습기와 좀에 강한 오동나무로 제작.해결하였다. 
     이로써 장례식때 후손들이 고인의 유품을 정리하면서 고인의 생전의 삶을 돌이켜보면 부모와 조상에 대한 효행심을 고취케 하고 먼 훗날 후손들에게 조상들의 역사와 생활상을 알릴 수 있게 하였으며 특히 온도변화로 생기는 인한 분골함 내부 결로현상과 분골이 결합되 발생하는 악취와 썩는 것을 방지하는 것에 특징이있다.
Patent KR-20000044148-A (KR)
Title: Optical system of camera
Inventor: KIM YOUNG JUN
IPC: G02B9/34
Filed: 1998-12-30
Abstract: PURPOSE: An optical system of a camera is provided to prevent the deterioration of the optical system performance by easily compensating the chromatic aberration, a distortion, the spherical aberration, and the coma-aberration. CONSTITUTION: Front and rear cover glasses(100,200) are arranged in parallel in a certain distance therebetween. A photographing device(300) is located in the rear of the rear cover glass(200) and an image is spotted. Lens groups(400,500) are mounted between the front and rear cover glasses(100,200) and formed with plastics. The lens groups(400,500) are composed of first, second, third, and fourth lenses(410,420,510,520). The first lens group(400) has the first and second lenses(410,420) and the second lens group(500) has the third and fourth lenses(510,520).
Patent KR-20000045462-A (KR)
Title: Method for manufacturing semiconductor device
Inventor: KIM WON GIL
IPC: H01L21/28
Filed: 1998-12-30
Abstract: PURPOSE: A method for manufacturing a semiconductor device is provided to prevent gate oxide degradation by forming an upper portion of a trench as a rounding shape. CONSTITUTION: A method for manufacturing a semiconductor device comprises the following steps. An accumulating structure of a pad oxide layer(21) and a nitride layer(22) is formed on an upper portion of a semiconductor substrate(20). A photoresist pattern(23) is formed on an upper portion of the nitride layer. The accumulating structure is etched by using the photoresist pattern as an etching mask. A polymer is formed by the etching process. A predetermined thickness of the pad oxide layer is etched to form an undercut toward its side face when the polymer is removed by using a wet etching method. The semiconductor substrate is etched to form a trench(25) by using the photoresist pattern as the etching mask. At this time, an upper portion of the trench has a rounding shape.
Patent KR-20000046284-A (KR)
Title: Rotating mechanism of closed-type compressor
Inventor: CHO JAE HO
IPC: F04C2/00
Filed: 1998-12-31
Abstract: PURPOSE: A rotating mechanism of a closed-type compressor is provided to optimize the rotation of a rotating mechanism of a closed-type compressor by maintaining the interval of a rotating mechanism in a dynamic state. CONSTITUTION: Intervals(SG,SG') are determined while interval(DG) between a stator and a rotor is not maintained uniform all the time in the operation of a compressor. The core of the rotor is eccentric e from the core of the state while a rotating mechanism doesn't operate. If the rotor rotates relatively to the stator by the operation of the compressor, the interval between the stator and the rotor is maintained uniform over the entire part between the rotor and the stator by the load applied on a crank shaft. Thereby, the rotor is operated by a designed operation property.
Patent KR-20000047240-A (KR)
Title: Call release and reconnection method in multimedia satellite communication system
Inventor: KIM SEON HUI
IPC: H04B7/14
Filed: 1998-12-31
Abstract: PURPOSE: A call release and reconnection method in the multimedia satellite communication system is provided to increase the success rate of call connection setup in the event of a call reconnection setup request from a set top box for data communication with a central station. CONSTITUTION: A call connection request data is received from a set top box(ST1), a central station processor, based on an error estimation value extrinsically received with the call connection request data, calculates an error compensation value and stores it in a first error information storage unit(ST2). The central station processor assigns communication resources to the set top box and carries out ordinary data communication with the set top box(ST3). In process of data communication, if a call release request data is received from the set top box(ST4), the central station processor sends a response message for the call release request data to the set top box(ST5). In case that a resource release request data is received from the set top box(ST6), the central station processor sends the error information stored in the first error information storage unit to the set top box in addition to a response message for the resource release request data(ST7).
Patent KR-19990029080-A (KR)
Title: 차폐 전기 컨넥터를 위한 차폐 브레이드 접속
IPC: H01R4/02
Filed: 1996-07-15
Abstract: 브레이드 접속 구조(1, 100)는 차폐 브레이드(8, 108)에 끼워지는 이와 전기적 접속을 위한 내부 윤곽(128)을 가지며 전기 컨넥터의 차폐 쉘에 고정되는 외부 링(12, 112)으로 구성되는데, 여기서 상기 브레이드(8. 108)는 외부링(12')에 견고하게 붙잡히며 복수개의 용접 점(310)에 의하여 이에 고정된다.
Patent KR-19990081970-A (KR)
Title: 중추신경계에 작용하는 약물로서 사용되는 1-피라졸-3-일-에틸-4-인돌-3-일-피페리딘
IPC: A61K31/4427
Filed: 1997-01-17
Abstract: 본 발명은 하기 화학식 I: 
     화학식 I 
     
       
     
     (단, 상기 식에서, 
     R 1 은 H 또는 A이고, 
     R 2 는 H이거나, Hal, NO 2 , CON(R 4 ) 2 , SO 2 N(R 4 ) 2 , 시아노, A 또는 R 4 -O 로 일- 내지 삼-치환된 페닐이고, 
     R 3 은 H, Hal, A, A-O-, 아미노, 시아노, 카르복사미드, NO 2 , SO 2 N(R 4 ) 2 이고, 
     R 4 는 H 또는 A이고, 
     R 5 는 H 또는 A이고, 
     A는 탄소수 1 내지 6의 알킬, 또는 불소로 일- 내지 삼치환된 탄소수 1 내지 6의 알킬이고, 
     Hal은 F, Cl, Br 또는 I이다.) 
     의 신규한 1-피라졸-3-일에틸-4-인돌-3-일피페리딘 유도체 및 이의 염에 관한 것으로, 이들은 약제학적으로 유용한 작용을 나타내는 물질로 판명되었다.
Patent KR-19990082039-A (KR)
Title: 고체 즉석 방출 투여 형태 및 이의 제조 방법
IPC: A61K45/00
Filed: 1997-01-24
Abstract: 본 발명은 치료의 활성 물질 또는 활성 농축물, 특히 수성 매질 중 겔형 성질을 갖는 뉴클레오시드의 지질 접합체를 포함하는 고체 즉석 방출 투여 형태 (IR 투여 형태) 및 이의 제조 방법에 관한 것이다.
Patent KR-20000010965-A (KR)
Title: Cmos output driver with p-channel substrate tracking for cold spare capability
Inventor: GOLKE KEITH W
IPC: H03K19/003
Filed: 1997-05-13
Abstract: PURPOSE: A CMOS driver circuit is provided to use as a spare or redundant circuit. CONSTITUTION: A power supply connection, a first and a second inverter comprising an input and an output, a first p-channel transistor and a first n-channel transistor coupled to the first inverter output are comprised and two modes of operation are operated. The first is called normal mode operation where VDD is connected to the power supply such that the part is active and the output driver must drive the signal or bus connected to the output node high or low depending on the input state. The second is called cold spare where VDD is connected to VSS but the output node remains connected to an active signal or bus which is driven high or low by another active part. Under this condition, the output node of the cold spare part must present a high impedance condition for any voltage level on the output node.
Patent KR-20000016539-A (KR)
Title: Novel aromatic derivatives substituted by a ribose, their method of preparation and application as medicine
Inventor: KLICH MICHEL
IPC: A61P31/04
Filed: 1997-06-10
Abstract: PURPOSE: A new aromatic derivative being ribose substituted is provided to be useful for staphylococcus skin diseases such as a septicemia of a staphylococcus, an acute staphylococcus skin inflammation on face or skin. CONSTITUTION: The invention discloses the compounds of formula (I):R1 = H, OH, alkyl, alkenyl or alkynyl optionally substituted or alkoxy; R2 = H, Hal; R3 = H, alkyl, Hal, R4 = (a) where Rg and Rh are H, alkyl, an aryl heterocycle; R5 = H or O-alkyl; R6 = alkyl or CH2-O-alkyl; R7 = H or alkyl. The compounds of formula (I) have antibiotic properties.
Patent KR-20000051874-A (KR)
Inventor: MUN SANG HUM
IPC: G06F17/50
Filed: 1999-01-27
Abstract: PURPOSE: A method is provided to improve a calculation accuracy and speed by adapting a modified cell model. CONSTITUTION: A simulation method is for estimating a surface state of a material divided by cells with certain size after etching or vacuum depositing it for time T. It comprises steps : a) forming an initial cross section of a material with an open cell exposed by etching or vacuum deposition process; b) inputting an information including vacuum deposition or etching point of each open cell; c) calculating a transfer speed according an etching or vacuum deposition point; d) shifting an etching or vacuum deposition point as much as certain time determined by a transfer speed; e) forming a new cross section by rearranging open cells exposed by an etching or vacuum deposition; and f) repeating b)-e) steps against to rearranged open cells until a sum of certain time becomes to time T.
Patent KR-20000055464-A (KR)
Inventor: LEE JE HEUN
IPC: C08L51/00
Filed: 1999-02-06
Abstract: PURPOSE: Polyphenylene ether resin compositions, which are excellent in impact strength and mechanical strength, are provided by applying denatured graft co-polymers to polyphenylene ether thermoplastic composites. CONSTITUTION: A polyphenylene ether resin compositions comprise: 50-95 parts by weight of resin consisting of 30-100 wt% of polyphenylene ether resin and 0-70 wt% of vinyl aromatic co-polymers; 5-50 parts by weight of enhancer; 1-50 denatured vinyl aromatic graft co-polymers prepared by melt blending 0-2 parts by weight of organic peroxide and 0.1-10 parts by weight of reactive monomers containing carboxylic acid or anhydrous groups thereof to 100 parts by weight of graft co-polymers prepared by polymerizing 1-80 parts by weight of rubber polymers and 20-99 parts by weight of aromatic vinyl monomers.
Patent KR-19990083068-A (KR)
Title: 기기 제어명령 처리시스템 및 그 방법
IPC: H04L12/64
Filed: 1999-04-09
Abstract: 외부 제어기(111)로부터 디지털 인터페이스(112)를 경유해서 기기(100, 200)로 보내진 명령을 처리하는 명령 처리시스템에서, 상태/명령 저장유니트(103)는 명령에 응답해서 그 내용을 외부제어기(111)에 알리기위한 최종실행된 명령을 저장한다. 한편, 관리정보 저장유니트는 그 수신된 명령의 실행직전후에 관리정보를 저장하고, 거기에서 이전에 실행된 명령의 내용을 문의하는 명령(Z)의 수신시, 상태/명령 저장유니트(103)에 저장된 명령(X, Y)은 응답 데이터를 문의 명령에 생성시키도록 판독출력된다. 그러므로, 사용자는 기기를 제어하기위해 구비된 최종제어명령의 내용을 쉽게 알 수 있다.
Patent KR-19990083119-A (KR)
IPC: G02B6/35
Filed: 1999-04-10
Abstract: 광 스위치는 광 빔의 제 1 시준축을 가지는 입력 광 시준기와, 하나는 광 빔의 제 2 시준축을 가지며 다른 하나는 광 빔의 제 3 시준축을 가지는 두 개의 출력 광 시준기와, 상기 광 빔의 제 2 및 제 3 시준축 중의 하나를 향해 상기 제 1 시준축을 따라 방향이 정해진 광 빔의 분배를 위한 장치를 구비한다. 상기 광 빔 분배 장치는 제 1 및 제 2 소정 위치 사이에서 이동가능한 적어도 하나의 반사기를 포함하고, 상기 반사기는 상기 입력 시준기와 상기 출력 시준기 중 하나 사이에 광 연결 경로를 제공하며, 상기 제 1 및 제 2 위치 각각은 상기 출력 시준기 중 하나의 선택에 해당한다.
Patent KR-20000012174-A (KR)
Inventor: HUR CHEOL WUNG
IPC: H01L21/68
Filed: 1999-04-12
Abstract: PURPOSE: A lead ball transfer device of semiconductor package equipment is provided to reduce a fail of product exactly separating a detailed lead ball from a lead ball transfer device and exactly setting on a board. CONSTITUTION: The lead ball transfer device of semiconductor package equipment comprises a transfer board of lead ball, a separator, and a projection of separator. In the lead ball transfer device, the transfer board of lead ball has an arranged bottom side with a holes in response to size of lead ball and connects an air pressure valve. The separator is placed in the transfer board of lead ball and separates the lead ball in a vaccum hole. The lead ball is adsorbed to the vaccum hole while the lead ball transfer device forces a force of vaccum, and the force of vaccum is removed then risen the projection of separator from the vaccum hole pushes the lead ball.
Patent KR-19990083174-A (KR)
Title: 질화물계 화합물 반도체의 성장방법
IPC: H01L21/20
Filed: 1999-04-14
Abstract: 본 발명은 결함의 발생을 억제하면서 기판 상에 질화물계 화합물 반도체를 성장시키는 방법을 제공하기 위한 것이다. 
     질화물계 반도체로 이루어지는 기판 상에 일반식 Al x Ga 1-x N(0≤x≤1)으로 나타나는 화합물 반도체 또는 일반식 ln y Al z Ga 1-y-z N(0＜y≤1, 0≤z＜1, 0≤y＋z≤1)으로 나타나는 화합물 반도체를 성장시킨다.  Al x Ga 1-x N으로 나타나는 화합물 반도체의 성장 온도는 약 900℃ 이상으로 하고 ln y Al z Ga 1-y-z N으로 나타나는 화합물 반도체의 성장 온도는 약 700℃ 이상으로 한다.
Patent KR-20000066915-A (KR)
Inventor: SHIN YOUNG SU
IPC: G09F3/10
Filed: 1999-04-21
Abstract: PURPOSE: An easily removable label which can be easily and perfectly removed from the outer surface of a plastic(PET or PE) bottle is provided to facilitate the recycle of the bottle and to prevent the introduction of foreign materials when the bottle is recycled. CONSTITUTION: An easily removable label(1) comprises a thin plate material such as PVC and OPS shrunk by a thermo-press on the outer surface of PET bottle(10) or polyethylene resin film attached to the outer surface of PET bottle(10) by elasticity wherein the label is characterized in that the label comprises a removable section(1') at one side formed by a pair of dotted lines(11) spaced with a constant distance positioned along the length; and a tear tape(12) having a width less than that of the removable section(1') is attached to the inner surface of the removable section(1').
Patent KR-20000072863-A (KR)
Inventor: CHOI KYOO YONG
IPC: G09C1/00
Filed: 1999-05-01
Abstract: PURPOSE: A method for judging the shortest distance by using a chaos time series is provided to judge the shortest course by calculating the distance according to the appointed order. CONSTITUTION: A method for judging the shortest distance by using a chaos time series uses a circuit, which indicates the distribution of six cities and on which city numbers from 0 to 5 are indicated. A time series of Z(t-4) of reduced quantum, £7| is changed into 0-15 and this arrangement is used. '0' is searched on the time series in case that the start point is '0' and from 1 to 5 are searched in order of a series after '0'. The shortest distance in this drawing is a circuit indicated with a dotted line, {0, 5, 4, 1, 2, 3, 0} or {0, 3, 2, 1, 4, 5, 0}.
Patent KR-20000075129-A (KR)
Inventor: KIM DONG HYEON
IPC: H03M1/00
Filed: 1999-05-24
Abstract: PURPOSE: An AD/DA converter is provided, which is constructed in a manner that weak current flowing through the printer port of a PC can drive an AD converter to realize a small-sized AD/DA converter and which collects and processes only effective data to automatize and control experimental apparatus. CONSTITUTION: An AD/DA converter is constructed in such a manner that a printer port(2), a DC power jack(3) and a communication buffer(4) are placed at the front part of a substrate(1') inside a body(1), and a detection diode(5), a module resistor(6), a rectifying diode(7) and a light emitting diode(8) are set at the front, back, left and right of the communication buffer. Transistors(9,14), a constant-voltage IC(10), an electrolytic condenser(11), a DA converter(12) and an OP AMP(13) are located at the left, right and front of the detection diode. A variable resistor(15), a first AD converter(16) and a second AD converter(17) are placed at the front of the OP AMP in a row, and an oscillator(18), a precise constant-voltage IC(10') and a PC connection jack(19) are formed at the left, right and side of the AD converters.