baber/WOPTO huggingface dataset:
Patent KR-20010017470-A (KR)
Inventor: YOO YEONG JAE
IPC: H02J7/00
Filed: 1999-08-11
Abstract: PURPOSE: A battery charging device of a digital still camera is provided to communicate the data with a digital still camera and a personal computer through a terminal in the state in which the digital still camera is inserted into a charging device by selectively charging a battery of a digital still camera. CONSTITUTION: A battery(11) is charged in the state in which a digital still camera(10) is inserted. The charging of the battery(11) is stopped by an exterior controlling signal. The data of the digital still camera(10) is outputted to a personal computer, or the data of the personal computer is received to output the data to the digital still camera. A DC converting section(22) receives an AC power source, and converts the AC power source to a DC power source. A controlling section(23) outputs the switching driving signal by using an exterior controlling signal. A switching section(24) is turned on and off by the switching driving signal, and selectively supplies the DC power source to the battery of the digital still camera(10). A terminal outputs the data of the digital still camera to a personal computer.
Patent KR-20010018084-A (KR)
Inventor: CHA SEUNG SIK
IPC: F24F11/00
Filed: 1999-08-17
Abstract: PURPOSE: A circuit for controlling a cooling is provided to improve the cooling efficiency of a refrigerant and an air conditioner by sequentially controlling each component inside the air conditioner without an outdoor device. CONSTITUTION: An air conditioner comprises a key input device(10); a detector(20) containing a water level sensor, an indoor temperature sensor and an indoor piping temperature sensor; a controller(30) to control the air conditioner according to detected signals by the detector; an electronic valve(SV) to supply a receiving groove by opening and closing according to the controller; a relay driving device(40) to drive a relay to supply a driving single-phase power to each component; first and second contactless relays(50a,50b) to drive a compressing fan motor and an electronic pump by contactlessly switching. An indoor is cooled by evaporating the refrigerant in an evaporator after condensing through a condenser. The receiving groove having heat after the evaporation is cooled in the condenser. These operations are performed by the controller(30) and the relay driving device(40) sequentially. Thereby, unnecessary power consumption is prevented and pleasant cold air is offered to the indoor.
Patent KR-20010026828-A (KR)
Inventor: CHOO JIN BU
IPC: G01R31/00
Filed: 1999-09-09
Abstract: PURPOSE: An apparatus and method of testing a voltage variation in power are provided to practically check and analyze influences by instantaneous accidents caused by a variation in power quality upon stability of information appliances to obtain strong and reliable power distributing systems. CONSTITUTION: The device includes a switch(10) for turning on/off input power through 3-phase power line, a variable transformer(20) for variable-transforming the input power to output the power to a power distribution system(120), and voltage/current detectors(40,50) for detecting voltage/current bypassed by a bypass switch(30) or transformed. The apparatus further has a controller(70) for controlling the bypass switch to bypass the input power, controlling the variable transformation of the transformer, and processing the detected voltage/current signal into digital data capable of being displayed, and a driver(100) for driving the variable transformation of the variable transformer and the bypass switch according to a control signal of the controller.
Patent KR-20010035587-A (KR)
Inventor: JIN HONG GI
IPC: B62D5/06
Filed: 1999-10-01
Abstract: PURPOSE: A power steering system removes an unnecessary increase of oil pressure, increases the durability of the system and prevents the leakage of oil. CONSTITUTION: A power steering system comprises a steering rack piston(200), a first piston(210), a second piston(220), a first and a second O-rings(151,152), a movement(130) and a spring(140). A movement of a rack bar(120) transferred the steering rack piston(200) Although, the steering rack piston(200) is transferred to one side of an operating cylinder(110), an unnecessary increase of oil pressure is prevented because oil is able to be exhausted through the other side of the operating cylinder(110). Further, when the full turn of a steering wheel is not made, a maximum oil pressure is provided if obstacles and etc. are on a steering wheel.
Patent KR-20010037231-A (KR)
Title: Method for allocating customer number using zip code
Inventor: SON JI HAE
IPC: G06F17/22
Filed: 1999-10-14
Abstract: PURPOSE: The method for allocating a customer number using a zip code of a customer is provided to enable the customer to easily remember and use his/her customer numbers related to city tap water, electricity supply, gas supply and the like, by assigning the zip code as the customer number rather than the number of a business office. CONSTITUTION: The unique customer number(20) separated from a management number(10). The customer number is comprised of a zip code(21) and a zip code distinction number(22), and serial numbers(23,24). The serial numbers(23,24) are divided into an order number(23) and an order reservation number(24). The management number(10) is comprised of a business office number(11), a job process number(12), a verification number(13), a Tong number(14) and a Tong distinction number. The management number(10) may be located before and after the customer number(20).
Patent KR-20000047534-A (KR)
Inventor: TANAKA MASAHIRO
IPC: G11C15/04
Filed: 1999-10-15
Abstract: PURPOSE: A CAM(content addressable memory) and a method for searching data of the CAM are provided to reduce electricity consumption in searching by specifying a memory block memorizing data and by searching only the specified block. CONSTITUTION: An OR circuit(18) detects data memorized in at least one address among an address range(address n1-address ni) corresponding to a memory blocks(n). Data of the entire valid cells(V(ni)-V(ni)) corresponding to the memory block n are input. When every valid cells are in an initial state('zero'), that is data are not recorded, the output of the OR circuit is zero. If there is a recorded address ni(memory cell M(ni)), V(ni) is '1' and the output of the OR circuit is '1'. Thereby, the recording of data in the memory block n is identified. The existence of data on the memory block n corresponding to the OR circuit is identified by the output of the OR circuit. Searching is performed only about the memory block which the output of the OR circuit is '1'. Therefore, only the memory block memorized data is sought by controlling a driver for searching.
Patent KR-20000047569-A (KR)
Title: Process for production of fluoroalcohol
Inventor: YOSHIZAWA TORU
IPC: B41M5/26
Filed: 1999-10-29
Abstract: PURPOSE: Fluoroalcohol which is substantially impurity-free, and use of the fluoroalcohol for the manufacture of an information recording medium comprising a substrate and as built thereon a recording layer adapted for laser writing and/or reading are provided CONSTITUTION: A fluoroalcohol is represented by the following formula (1): H(CFR¬1CF2)nCH2OH (wherein R¬1 represents F or CF3, when n=1; R¬1 represents F, when n=2) comprising reacting methanol with tetrafluoroethylene or hexafluoropropylene in the presence of a free radical source, wherein the reaction mixture is subjected to distillation either in the presence of a base or after contact of said reaction mixture with a base.
Patent KR-20010044906-A (KR)
Inventor: BAE DAE GYU
IPC: H04W92/18
Filed: 1999-11-01
Abstract: PURPOSE: A portable phone and a method for transmitting and receiving user information between the portable phones are provided to offer a portable phone capable of executing direct communication without the necessity of going through an exchange by sharing user information at a short distance. CONSTITUTION: A portable phone 'A' pushes a specific button to send information to a portable phone 'B'(410). The portable phone 'A' sets up a packet containing information for a protocol version and a service type and transmits it to the portable phone 'B'(420). The portable phone 'B' checks the message contents contained in the received packet and confirms whether the received protocol version is consistent with its own version(430). If the protocol versions are in accord, the portable phone 'B' sets up a "receiving possible" control information packet and transmits it to the portable phone 'A'(440). Receiving the "receiving possible" control information packet, the portable phone 'A' selects user information to transmit(450). The portable phone 'A' generates a packet containing user information and transmits it to the portable phone 'B'(460). If transmission is completed(470), the portable phone 'A' transmits a transmission "end" packet to the portable phone 'B'(472). The portable phone 'B', receiving the transmission end packet, sends an ACK(ACKnowledge) signal to the portable phone 'A'(474).
Patent KR-20000023931-A (KR)
Inventor: WON TAE YOUNG
IPC: H01L27/00
Filed: 1999-11-06
Abstract: PURPOSE: A numerical analysis method for a 3-dimensional ion injection is provided to effectively enable a simulation with respect to a complicate structure where deposition and etching process is applied as well as a flat silicon layer. CONSTITUTION: In a numerical analysis method for a 3-dimensional ion injection having an effective calculation time, an ion distribution replica method is first used to realize a 3-dimensional ion injection, then a layer determining algorithm is applied to perform a multi-layer ion injection calculation. Then, an ion injection process is performed with respect to a structure having a surface step difference. The numerical analysis can be applied in relation to other process simulators.
Patent KR-20010046708-A (KR)
Inventor: CHO CHANG YEON
IPC: F16H59/00
Filed: 1999-11-15
Abstract: PURPOSE: A gearshift operation device prevents vibration due to the operation of a transmission and a gearshift operation device from being transmitted to a gearshift lever to improve gearshift operation feeling. CONSTITUTION: A gearshift operation device includes an adjusting lever(8), a cable and a buffering device. The adjusting lever(8) is connected to one side of a shift fork assembly built in a transmission to engage gear of synchronizing device to execute gearshift. The cable transmits gearshift operation of a gearshift lever to the shift fork assembly. The buffering device is installed between the adjusting lever(8) and the cable and comprises a plate(16) and an elastic member(26) to prevent vibration and impact generated in the transmission from being transmitted to the gearshift lever. The plate(16) is partially cut. The elastic member(26) is installed between the plate(16) and the adjusting lever(8).
Patent KR-20010048983-A (KR)
Title: Delay locked loop circuit
Inventor: CHO HO YEOP
IPC: G11C8/00
Filed: 1999-11-30
Abstract: PURPOSE: A delay locked loop(DLL) circuit is provided to increase the resolution of the DLL two times or to compensate for a skew between an external clock and an internal clock accurately, by reducing a unit delay to one delay gate. CONSTITUTION: The circuit includes: a delay chain(10) comprising a unit delay(14) having a 2-input NAND gate and a unit delay(16) having a 2-input NOR gate in turns; a number of shift circuit parts(20) storing outputs of each unit delay chain by receiving an output signal of each unit delay chain and a shift reset signal(shift_reset) signal and a shift signal(shift) as inputs; a NOR gate delaying a clock as much as a delay to compensate a clock skew by receiving an output signal of two adjacent shift circuit part and a clock signal(clk) as inputs; and a copy delay chain part(30) outputting a pulse signal having the same delay as the delay chain by receiving an output signal of the NOR gate.
Patent KR-20010056452-A (KR)
Inventor: LEE GEUM JU
IPC: G08G1/09
Filed: 1999-12-15
Abstract: PURPOSE: A navigation device for a vehicle is provided to offer an exact data about the lay of road without storing data about the lay of road at an internal at the vehicle by receiving data about the lay of road from an external data storage server. CONSTITUTION: A navigation device for a vehicle includes a navigation module(100), a repeater(200), a wireless communication part(300), and a data storage server(400). The navigation module(100) receives data about the lay of road from the data storage server(400), and displays data about the lay of road and a traffic information. The repeater(200) transmits a communication between the navigation module(100) and the wireless communication part(300). The data storage server(400) stores the data about the lay of road, and when a signal requesting the data about the lay of road is received from the wireless communication part(300), the data storage server(400) reads the related data, and transmits them to the navigation module(100) through the wireless communication part(300).
Patent KR-20000062202-A (KR)
Title: 전자기식 디스크 브레이크
IPC: F16D55/00
Filed: 1999-12-16
Abstract: 본 발명은 자석 코일(15)과 철제 아치형 부재(17)를 구비하면서 차륜 회전에 대해 고정 지지되어 있는 가변 자계의 발생을 위한 하나 이상의 전자석(11)과, 철제 아치형 부재(17) 내에 형성되어 있는 평면 자극면(18, 19)에 간극을 두고 이격되어 차륜과 함께 회전할 수 있도록 연결되어 있는 브레이크 디스크(10)를 구비하는 차량 차륜용 전자기식 디스크 브레이크에 있어서, 브레이크 디스크(10)와 전자석(11)의 자극면(18, 19) 사이에는 마찰 브레이크 라이닝(12)이 배치되고, 차륜 축(16) 방향으로 활주가능하게 지지되어 작은 행정 이동을 수행할수 있는 전자석(11)이 브레이크 라이닝(12)을 브레이크 디스크(10) 및 철제 아치형 부재(17)의 자극면(18, 19)으로 가압하여 제어가능한 압착 고정력을 발생하도록 형성되어 있는 것을 특징으로 하는 차량 차륜용 전자기식 디스크 브레이크에 관한 것이다.
Patent KR-20010063068-A (KR)
Title: Axial flow fan
Inventor: CHO GYEONG SEOK
IPC: F04D29/32
Filed: 1999-12-21
Abstract: PURPOSE: An axial flow fan is provided to reduce noise generated in the axial flow fan by effectively controlling circular flow generated at a blade tip, thereby improving the riding feeling of an automobile. CONSTITUTION: An axial flow fan includes a hub coupled with a rotary shaft, and a plurality of blades(11) radially arranged at the outer periphery of the hub with forward sweep and integrately rotating with the hub for sending the air in axial direction, wherein a blade tip(11a) of a trailing edge of each blade is partly removed to gradually reduce chord length from the point where radius ratio is about 0.9 to the blade tip, setting angle is almost regular, and a camber angle of the blade is about 10°and gradually increased to about 20°until the blade tip.
Patent KR-20000017875-A (KR)
Inventor: KIM CHANG HOON
IPC: G04B19/00
Filed: 1999-12-24
Abstract: PURPOSE: An analog and digital watch is provided to manufacture a watch which has all the advantages of the analog and digital watch and has an advantage wherein the user can see the time and the digital information at the same time even if the hands of the watch hides the digital information as it is shown two times on the face of the watch. CONSTITUTION: The analog and digital watch comprises two identical number plate in one face and two or more LCD plates. The watch shows the identical digital information at least twice so it is convenient for users to see the wanted information at a sight. The watch has needles which are big enough and even if these needles cover the digital information partly from being seen, there is still another digital information plate so it is convenient and useful for users.
Patent KR-20000048473-A (KR)
Inventor: CHAE SOO KYUM
IPC: C09D167/00
Filed: 1999-12-30
Abstract: PURPOSE: A low temperature baking type epoxy polyester class dull powder paint composition is provided which is hardened to show gloss in a coat and excellent appearance under low temperature baking condition(140-150°C) and also shows the same appearance, leveling and mechanical properties as ready-made dull powder under high temperature baking(over 180°C). CONSTITUTION: A polyester class dull powder paint composition contains the following components of: 10-30 wt% of polyester resin which has 20-50 mgKOH/g in acidic figures and 6,000-12,000 in weight average molecular weight; 5-20 wt% of acryl copolymerization resin which has 100-250 mgKOH/g in acidic figures and 3,000-6,000 in weight average molecular weight; 30-55 wt% of epoxy hardening agent whose equivalence is 600-1,400 and fusion viscosity is 5-20 poise; and 0.2-5 wt% of hardening promotion agent which includes imidazols and epoxy hardeners which are made by modifying imidazols.
Patent KR-20010059183-A (KR)
Inventor: KOO JA CHUN
IPC: H01L21/31
Filed: 1999-12-30
Abstract: PURPOSE: A method for forming an inter-metal interlayer dielectric of a semiconductor device is provided to improve the productivity by preventing a lifting phenomenon and a crack. CONSTITUTION: A metal line(3) is formed on a lower interlayer dielectric(2). A SiOxCy thin film is coated by the first interlayer dielectric(4). A surface of the SiOxCy thin film is processed by using a gas plasma including a carbon. The second interlayer dielectric(5) is formed on the SiOxCy thin film. The second interlayer dielectric(5) is a capping insulating layer of SiOxFy. A via contact is formed by etching the second interlayer dielectric(5). The contact mask is removed.
Patent KR-20010059718-A (KR)
Inventor: WOO SEUNG HUN
IPC: B60R22/00
Filed: 1999-12-30
Abstract: PURPOSE: An automatic seat belt structure for a vehicle is provided to reduce the degree of injuries as well as to remove inconvenience by automatically buckling up a seat belt when a passenger sits on a seat. CONSTITUTION: A seat belt is wound on a retractor and the retractor is embedded in a center pillar of a door. The end of the seat belt is fixed to the upper portion of the center pillar and a tongue(32) of the seat belt slides along a guide rail(40) installed in a crash panel to be automatically inserted into a buckle(33) fixed to a vehicle body(100). The guide rail contains a slider(41) operated by a drive belt(42) to actually move the tongue. The slider is controlled by a driving device(44) controlled by a control device(43).
Patent KR-20000048616-A (KR)
Inventor: STUPPY JOHN J
IPC: G09B7/02
Filed: 1997-09-24
Abstract: PURPOSE: A computer based system provides for the assessment, management and instruction of students, and for the delivery of work pages and other instructional materials in the form of electronic student workbooks. CONSTITUTION: A computer based assessment of the student produces a student profile including skill gaps or learning objectives. Teacher (20) and student (22) workstations are networked CPUs with pen-based tablet inputs, and displays network with a central processor (10) and data base. A director workstation may also be provided network with the central processor. The central processor generates a teacher workbook either directly or with input from the director workstation. The teacher, or teacher and director together, assemble an electronic student workbook containing instructional materials correlated with the student profile. The system tracks useful data such as instructional material (e.g., textbook pages, work sheets, software, simulations, tests, etc.) delivered to students.
Patent KR-20000048634-A (KR)
Inventor: CONSTANTINI ERIC
IPC: H04M3/00
Filed: 1997-09-25
Abstract: PURPOSE: An interactive communication system is provided to perform interactive communication between at least two users each provided with a telephone set of the switched telephone network, via the Internet. CONSTITUTION: Each telephone set is directly locally connected to an associated interface device. The first user, who initiates the communication, dials on his set the telephone number of the second user indicating to his interface device that he wishes to communicate via the Internet. The interface device of the first user then connects with the interface device of the second user via the Internet, the two telephone sets being rung off. Once the connection has been established via the Internet, each interface device indicates that to its associated telephone set, then each of the users picks up his set and communicates interactively with his correspondent via the Internet.
Patent KR-20000049167-A (KR)
Title: Tappet for the valve gear mechanism of an internal combustion engine
Inventor: KUHL MARIO DIPL ING
IPC: F01L13/00
Filed: 1997-06-13
Abstract: PURPOSE: A tappet for the valve gear mechanism of an internal combustion engine is provided which uses a simple method to generate a mechanism which allows a displacement in an axis direction. CONSTITUTION: A tappet (1) has a ring-shaped section (2) which concentrically encloses a circular section (5). Both sections (2, 5) can be actuated by cams (4, 7) having different strokes and be selectively coupled to one another by radially displaceable push rods (11, 14). To prevent switching errors, the displacement of the push rod (11) in the ring-shaped section (2) can be prevented by a piston (26) with a control edge (28) movable in the longitudinal direction of the tappet. For that purpose, the piston (26) communicates with a groove (29) of a cam (4), starting from a second partial area ( beta ) of its base circle. In this partial area ( beta ) the piston (26) can be pushed by hydraulic pressure in the direction of the cam and into the groove (29), so that it extends with its control edge (28) into a ring-shaped groove (30 or 31) of the first push rod (11), blocking said push rod (11) out of its desired displacement phases.
Patent KR-20000069747-A (KR)
Title: 반도체 장치
IPC: H01L29/78
Filed: 1998-10-12
Abstract: 본 발명은 두개의 일련의 접속 ― 하나의 트랜지스터의 소스(하측 트랜지스터 T 1 )는 저 전압 단자 V SS 에 접속되고, 다른 하나의 트랜지스터의 드레인(상측 트랜지스터 T 2 )은 고 전압 단자 V dd 에 접속됨 ― 된 n-채널 DMOS 트랜지스터를 포함하는 반 브리지 회로에 관한 것이다.  하측 트랜지스터의 드레인 및 상측 트랜지스터의 소스는 출력 단자(4)에 접속된다.  회로는, p형 기판(10)에 인가되는 n형 또는 p형 에피택셜층(11)을 갖는 반도체 몸체에 배열된다.  에피택셜층에서, 두개의 n형의 존 ― 상기 각각의 영역은 트랜지스터중 하나의 트랜지스터의 드리프트 영역을 형성하고, 반도체 몸체내에 컵-형태의 n형의 존에 의해 둘러싸임 ― 트랜지스터에 대해 정의된다.  하측 트랜지스터 T1의 n형 컵-형태의 존(12)내에, 컵-형태의 영역(12)으로부터 T 1 의 드리프트 영역(15)을 절연하고, 컵-형태의 영역(12)와 함께, T 1 의 백게이트 영역(17) 및 소스(17)에 접속되며, V SS 에 접속되는 p형 컵-형태의 존이 제공된다.  상측 트랜지스터에서, n형 컵-형태의 존(13)은 드레인과 더불어, V dd 에 접속된다.  하측 트랜지스터의 경우에서와 마찬가지로, n형 컵-형태의 존은 고정된 전압이고, 전자는 이러한 영역에 의해 기판내로 주입되는 것을 배제하고, 그 결과, 또한, 잔여 회로에서의 래치업 및 장애의 위험이 배제된다.  기판의 보다 높은 저항에서, 기판에서 발생하고, 또한 래치업 및 장애의 위험을 줄 수 있는 전압 점프를 또한 배제한다.  또한, 적어도 하측 트랜지스터는 RESURF 조건을 만족하도록 하는 방법으로 구성될 수 있고, 따라서, 고 전압에서 또한, 사용되는 장치를 가능하게 한다.
Patent KR-20000069760-A (KR)
Title: 슈크로즈 시럽의 처리 방법
IPC: C13B35/00
Filed: 1997-12-24
Abstract: 본 발명은 건중량으로 적어도 30 중량%이상의 초기 슈크로즈 함량을 가지는 슈크로즈 수계 시럽을 처리하는 분류 방법으로, 3 내지 8개의 탄소원자를 가지는 알칸올, 케톤 및 에스테르 및 이의 혼합물로 이루어진 군에서 선택된 용매와 상기 시럽을 혼합하여 슈크로즈 함유 고상에 접촉된 적어도 2가지 이상의 액상을 가지는 계를 형성하고 상기 상들을 분리시켜서 슈크로즈 함유 고상에서 얻어지는 산물 외에 액상으로부터 적어도 2가지 이상의 산물―여기서 2가지 이상의 산물 중 제1 산물은 건조 중량으로 상기 초기의 슈크로즈 함량보다 더 큰 슈크로즈 함량을 가진 것이고, 제2 산물은 건조 중량으로 상기 초기의 슈크로즈 함량보다 더 작은 슈크로즈 함량을 가진 것임―을 수득하게 되는 분류방법을 제공한다.
Patent KR-20000075878-A (KR)
Title: 이중 직관식 코리올리 유량계
IPC: G01F1/84
Filed: 1998-12-17
Abstract: 이중 직관식 코리올리 유량계는 피측정 유체가 흐르는 직관형인 플로우튜브(4), 카운터밸런서로서 기능하도록 양단에 고정된 중공통형의 외측 튜브(5), 구동장치(7), 및 한 쌍의 센서(8)로 구성되고, 플로우튜브(4)를 구동장치(7)에 의해 진동시켜, 플로우튜브(4)에 작용하는 코리올리 힘에 비례한 위상차를 한 쌍의 센서(8)에 의해 검지함으로써 질량유량을 측정한다.  본 발명은 이와 같은 이중 직관식 코리올리 유량계에 있어서, 판부재(결합플레이트(6))를 사용하여 외측 튜브(5)의 양단에서 플로우튜브(4)를 고정하고 결합플레이트(6)를 튜브어셈블리 지지용 판스프링(14)과 일체형으로 형성한다.  본 발명은 이와 같이 플로우튜브와 외측 튜브를 판부재에 의해 결합함으로써, 그 사이에 발생하는 응력을 흡수하고, 또한 외측 튜브의 온도의 균일화를 도모할 뿐아니라 제조비용을 현저히 절감할 수 있게 된다.
Patent KR-20010006178-A (KR)
Title: 성형된 접착제
IPC: B41J2/135
Filed: 1997-09-23
Abstract: 성형된 접착물은, 주형내에서 접착제 혼합물을 성형하는 단계, 제1중합체 전구체를 상기 주형내에서 중합 반응시켜 하나 이상의 특징있는 표면을 보유한 성형된 접착물을 제조하는 단계, 상기 성형된 접착물을 상기 주형으로부터 제거하는 단계 및 상기 특징있는 하나 이상의 표면을 기재에 부착하는 단계를 포함하는 방법에 의해 제조된다. 상기 성형 단계에 있어서, 상기 주형은 하나 이상의 특징있는 표면을 보유하고, 상기 혼합물은 제1중합체 전구체와 제2중합체 전구체, 또는 제1중합체 전구체와 열가소성 중합체를 포함한다.
Patent KR-20010012095-A (KR)
Title: 영구적으로 구조화된 마그네틱 레코드를 판독하기 위한 장치
IPC: G06K7/08
Filed: 1998-04-03
Abstract: 본 발명은 회로 배열에 결합된 유도성 판독 헤드를 가진 오실레이터를 포함하며, 제 1 보자성을 가진 영구적으로 구조화된 마그네틱 레코드를 판독하는 장치이다.  판독 헤드가 제 1 보자성(전형적으로 2,000 에서 5,000 에르스텟)보다 큰 제 2 보자성을 가진 마그네틱 레코드에 응답하는 전기적 신호를 제공하는 것과 같이 판독 헤드의 적어도 한 면이 중요 주파수 범위에 대한 판독 헤드의 임피던스보다 큰 임피던스를 보인다.  전기적 신호는 판독 헤드를 통한 전압으로부터 유도되고, 바람직하게 전압차를 주기위해 판독 헤드의 어느 한 면에 대한 전압을 빼고 시간에 대한 차이를 합하는 차등 적분기에 의해 검출된다.