baber/WOPTO huggingface dataset:
Patent KR-20000002806-A (KR)
Title: Liquid crystal display element
Inventor: LEE DEUK SU
IPC: G02F1/1335
Filed: 1998-06-23
Abstract: PURPOSE: A liquid crystal display element is provided to increase a block matrix area and to prevent corrosion of the block matrix. CONSTITUTION: The liquid crystal display element comprises a first substrate having a block matrix, a color filter and a counter electrode and a second substrate having a thin film transistor and a pixel electrode and disposing in opposition to the first electrode. In the liquid crystal display element, the first and the second substrate is combined and the block matrix is disposed to be extended to an outer surface of the first substrate and the outermost portion is surrounded with a protective layer.
Patent KR-19990007343-A (KR)
Title: 이동 통신을 위해 하향 채널을 할당하는 방법 및 시스템
IPC: H04W72/08
Filed: 1998-06-25
Abstract: 각 개별 이동 단말기와의 이동 통신에 최상의 품질을 갖는 하향(downward) 채널을 기지국이 할당할 수 있도록 하기 위해서,  이동 단말기는,  다른 이동 단말기를 위해 기지국(2) 으로부터 전송된 각각 이용 가능한 하향 채널의 통신 품질을 측정하는 통신 품질 측정부(13)와,  이용 가능한 하향 채널들 중에서 최상의 통신 품질 값을 주는 소정의 하향 채널을 선택하는 비교부(15)와,  기지국(2)중의 하나에 전송될 호출 요구 포맷에 따라서 소정의 하향 채널 정보를 포함하는 호출 요구를 준비하는 호출 요구부(16)로 구성된다.
Patent KR-19990007370-A (KR)
Title: 내열충격성이 우수한 복합압연롤
IPC: B22F7/08
Filed: 1998-06-26
Abstract: (과제) 내열충격성이 우수한 복합압연롤을 제공한다. 
     (해결수단) 외측링부가 초경합금으로 구성되고, 상기한 외측링부에 주입접합된 내측링부가 구형상 흑연주철로 구성된 복합압연롤에 있어서, 상기한 외측링부에는, 모두 결합상 형성성분으로서, Co : 5 ~ 27%, Ni : 2 ~ 12%, Cr : 0.3 ~ 3%를 함유하고, 나머지는 실질적으로 분산상 형성성분으로서의 WC로 이루어진 조성을 가지는 초경합금으로 구성되며, 상기한 내측링부에는, C : 3 ~ 4.5%, Si : 1.5 ~ 4.5%, Mn : 0.1 ~ 2%, Mg : 0.02 ~ 0.2%를 함유하고, 더욱 필요에 따라서, Mo, Cu, Cr, V, W, Sn 및 Sb중의 1종 또는 2종이상 : 0.1 ~ 5%를 함유하고, 나머지는 Fe와 불가피한 불순물로 이루어진 조성을 가지며, 또한 퍼얼라이트상, 베이나이트상 및 마르텐사이트상 중의 어느 것과 페라이트상의 혼합상을 주체로 하는 소지에, 유심구조의 구형상 흑연이 분산분포되고, 상기한 유심구조의 구형상 흑연은, 주조시에 생성된 심부와, 열처리시에 추출된 주변부로 이루어진 조직을 가지는 구형상 흑연주철로 구성되어 이루어진다.
Patent KR-20000003738-A (KR)
Title: Travelling vibration damping system of constructive heavy equipments
Inventor: LIM BYUNG HYUK
IPC: F15B11/00
Filed: 1998-06-29
Abstract: PURPOSE: A traveling vibration damping system of constructive heavy equipments is provided to diminish the vibration of the front and rearward and also to absorb the shock. CONSTITUTION: A driving vibration diminishing system comprises:installing a system control valve(1) having an accumulator(2) in an influx circuit to connect a boom cylinder(4) to a main control valve(3) of a constructive heavy equipment; a pressure reduction valve(13) installed on the system control valve to pack the pressure reacting to the boom cylinder only up to a certain pressure in the accumulator and to absorb the shock by the accumulator when the system is operated,
Patent KR-19990023174-A (KR)
Title: 갈바노 플라스틱 광학 판대
IPC: G02B7/02
Filed: 1998-06-30
Abstract: 본 발명은, 광학부 (7) 에 인접하는 - 바람직하게는 다수의 부분으로 이루어진 - 내부 (2) 및 다수의 스프링 게르버보 (11, 12, 1i) 에 의해 연결된 외부 프레임 (3) 을 갖는 광학 부품 (7) 용 광학 판대에 관한 것으로, 상기 스프링 게르버보 (11, 12, 1i) 및 경우에 따라서는 다른 부분들도 갈바노 플라스틱으로 제조된다.
Patent KR-20000004391-A (KR)
Title: Plasma display panel
Inventor: PARK CHANG SIK
IPC: H01J11/26
Filed: 1998-06-30
Abstract: PURPOSE: A plasma display panel is provided to obtain high luminance and be operated by low voltage. CONSTITUTION: The plasma display panel comprises: a rear substrate(30); address electrodes(22) formed on the rear substrate, and which are disposed by two or more on a discharge cell; the first dielectric layer(24) applied on the rear substrate; separating walls(26) formed on the first dielectric layer and defining unit discharge cell; fluorescent substance(28) applied on the separating walls and the surface of the first dielectric layer between the walls; dummy electrodes(29) positioned on the fluorescent substance over the address electrodes; a front substrate(40); discharge sustaining electrodes(34) formed on the front substrate, and consisted transparent electrodes and bus electrodes; the second dielectric layer(36) applied on the front substrate; and a protective layer(38) applied on the second dielectric layer.
Patent KR-20000007550-A (KR)
Title: Automatic feeding apparatus of feeding water for cultivation
Inventor: PARK HUN CHEOL
IPC: A01K63/04
Filed: 1998-07-04
Abstract: PURPOSE: The present invention is about automatic feeding apparatus of feeding water for cultivation to provide raw water to rearing aquarium for cultivation by processing the temperature of raw water inflowerd with constant. CONSTITUTION: Automatic feeding apparatus of feeding water for cultivation consisted of boiler as a heating device to heat circulating hot water, raw water tank to store raw water and heat with constant temperature, heat exchanger to cross heat exchange circulating hot water and raw water laid out between said boiler and raw water tank, said boiler having at least two pump to circulate circulating hot water, said raw water tank comprising eruption pipe with many of pore linkage layout to circulating pump on the bottom, temperature sensor installed in said raw water tank by dipping to sense temperature of raw water in said raw water tank, incoming line installed in the upper of said raw water tank to provide raw water to raw water tank, drain side piping and inhalant side piping having many drain valve to inhalant/drain seawater to outside, at least a pair of pump, heater, cooling device, pipe for providing feeding water.
Patent KR-20000007888-A (KR)
Title: Radio transmitting equipment having radio/cable section check function and checking method of error generation in communication system
Inventor: TAE HYUNG SIK
IPC: H04B7/00
Filed: 1998-07-08
Abstract: PURPOSE: A radio transmitting device having a loop-back function and a checking method of an error section in a communication system are provided. CONSTITUTION: The method comprises: a switching device(110) to interface a communication system, data, and various control signals, being contacted with a first radio transmitting device(120) through a cable; the first radio transmitting device(120) to convert the data and the various control signals received from the operating device(110); the first radio transmitting device(120) to transmit to a second radio transmitting device(130) through a radio signal communicating passage; the first radio transmitting device(120) to transmit the modulated signal received from the second radio transmitting device(130) to the operating device(110).
Patent KR-20000008587-A (KR)
Title: Device for preventing dewing in air conditioner and method thereof
Inventor: CHOI GWEE JOO
IPC: F24F11/00
Filed: 1998-07-14
Abstract: PURPOSE: A device for preventing a dew is provided to vent smoothly a air and to reduce the amount of dew formed on the front surface of an indoor equipment. CONSTITUTION: A device for preventing a dew from being formed comprises:an electric power instrument(100) transforming a compatible alternate current voltage supplied from an alternate current electric power terminal to a continuous current voltage needed to operate an air conditioner; a key inputting unit(103) installed on a control panel of the indoor equipment; and a remote controlling signal receiving unit(7) receiving an infrared ray signal transferred from a remote controller(9) according to a key operation of the remote controller.
Patent KR-19980072121-A (KR)
Title: 멀티콘센트의 순차전원제어장치
Filed: 1998-07-24
Abstract: 본 발명은 멀티콘센트의 순차전원제어장치에 관한 것으로서, 상용전원에 전기적으로 접속되어 고/저의 전기적 부하에 상기 상용전원을 급전하기 위한 다수의 플러그수납 포트를 구비한 멀티콘센트장치에 있어서, 상기 다수의 플러그수납 포트의 개수와 대응하는 개수로 이루어져서 상용전원을 각 플러그수납 포트에 순차적으로 공급시키기 위한 스위칭을 행하는 다수의 스위칭수단과, 해당 멀티콘센트장치에 대해 별도로 설치되어 별도의 매트릭스스위치에 의한 전원공급명령의 입력에 따라 상기 다수의 플러그수납 포트중에 특정한 단일의 플러그수납 포트가 나머지의 플러그수납 포트에 비해 상용전원의 최종적인 공급이 이루어지도록 함과 더불어, 공급전원의 차단명령에 따라 상기 특정의 플러그수납 포트가 최우선적으로 전원차단이 이루어지는 것으로부터 나머지의 플러그수납 포트가 후속적으로 전원차단이 이루어지도록 상기 다수의 스위칭수단을 제어하는 외부 순차전원제어수단을 포함하여 구성되고; 상기 다수의 플러그수납 포트중에 특정의 플러그수납 포트는 상기 고부하기기로부터 인출된 전원플러그가 접속가능하게 할애되도록 이루어짐에 따라; 각 부하기기에 대한 전원효율이 현저하게 향상됨과 더불어, 서지전류나 노이즈의 혼입이 미연에 방지되면서 보다 안정된 기능실현이 가능하게 된다는 이점을 갖게 된다.
Patent KR-20000010188-A (KR)
Title: Power saving controlling device of power supply system and method thereof
Inventor: HONG SUNG CHUL
IPC: H02J7/00
Filed: 1998-07-30
Abstract: PURPOSE: Power saving control device of the power supply system is provided which makes the condenser supply power for load with a rectifier in the daytime and repeats recharging the condenser that is discharged during the daytime in the nighttime. for the operation of a direct current power supply device or non-power outage device. CONSTITUTION: The operation control device(305) comprises the microprocessor(306) and RTC( Real-Time Clock, 307), the alarm status monitoring part(308), and the voltage/current monitoring part(309). The microprocessor(306) receives the real-time information from the real-time clock(307) and controls the power supply of the rectifier(301) and the storage battery(303) according to the time zone and controls the storage of electricity of the storage battery(303). Also, the microprocessor(306) detects the current/voltage through the voltage/current monitoring part(309) that is connected to the current detector(304), and at the time of power failure, it receives the information from the alarm status monitoring part(308) and controls the rectifier(301) and the storage battery(303). Thus, by using the midnight power that is relatively cheap, it has the effect of energy reduction and the power rates reduction.
Patent KR-20000013217-A (KR)
Title: F.r.p. coating method of well for fundamental construction of bridge
Inventor: YANG YOUNG KYU
IPC: E02D27/16
Filed: 1998-08-06
Abstract: PURPOSE: The coating method is provided to solve the problem of water pollution and life shortening of a structure due to the erosion of a steel plate. CONSTITUTION: The coating method has the steps of: coating F.R.P(5) to be densely attached with a steel plate to prevent the erosion of the surface of the outer steel plate(4) of a well; densely attaching the F.R.P on the surface to prevent from contacting the outer steel plate of the well tank with water or air; coating the surface of the upper outer steel plate(4) of a blade top(1) of a well with F.R.P(5) to prevent the erosion and water pollution, and also to play a role of the base of a well.
Patent KR-20000014204-A (KR)
Title: Water level control method for automatic washing machine
Inventor: RYU HYUNG DAE
IPC: D06F33/02
Filed: 1998-08-18
Abstract: PURPOSE: A method is provided to quickly untie the twist of the washing by separating the washing closed in the wall of an inner washing tub by the resupplied washing water, and to devise the smooth rotation of the washing water. CONSTITUTION: The method comprises steps of: detecting(S2) the amount of the washing by inputting the washing into an inner washing tub(103) during a washing process(S1); supplying(53) water to the established water level when the water level to supply water by the washing amount detection(S2) is established; transmitting the washing water of the inner washing tub(103) by a washing slot(104) by right and reverse rotating the inner washing tub(103) in high speed; exhausting to an outer washing tub(102); closing the washing in the inner washing tub(103) to the wall of the inner washing tub(103); washing polluted materials of the washing by filtering the washing water into the inside of the washing; and resupplying(S9) by a detection(S8) of a water level frequency after passing(S7) a certain time after stopping(S6) a motor.
Patent KR-20000018411-A (KR)
Title: Manufacturing method of cap having a visor printed with high resolution photograph or picture
Inventor: KANG IL SUK
IPC: A42B1/24
Filed: 1998-09-02
Abstract: PURPOSE: Cap having a visor printed with high resolution photograph or picture is provided which a map or a route map for visiting area on the visor is useful and convenient. The cap can be used as souvenir or instead of information pamphlet. CONSTITUTION: Manufacturing method comprises the following steps of: printing photographs or pictures(4) on the thin and transparent panel such as PVC, PP, ACRYL; cutting the soft plastic foam into the shape of the visor to make visor frame(3); cutting the printed cover plate(5) into the desirable size; adhering the printed cover plate onto the one/both side of the frame; sewing decorative cloth(6) onto the other side of the frame.
Patent KR-20000018994-A (KR)
Title: Contact structure having contact holes of non-uniform size and method for making the same
Inventor: KIM HYUNG SEOB
IPC: H01L21/28
Filed: 1998-09-08
Abstract: PURPOSE: A semiconductor device is provided to form a good contact hole into interlayer dielectric(ILD), forms a good contact hole on a plate node for a capacitor of DRAM, and enhances a production yield and reliability. CONSTITUTION: A method for making the semiconductor device forms an interlayer dielectric layer (220) on a first conductive layer, planarizes the interlayer dielectric layer, simultaneously forms many contact holes(210) having non-uniform sizes, and buries a second conductive layer oin the contact hole. Thereby, the method enhances a production yield and a reliability.
Patent KR-19980087783-A (KR)
Title: 쓰레기의 재활용처리방법
Filed: 1998-09-16
Abstract: 본 발명은 쓰레기를 처리하여 재활용하는 기술에 관한 것으로 종래 매립 및 소각에만 의존하는 가정용 쓰레기를 효과적으로 처리할 목적으로 안출된 것이다. 
     이를 위하여 본 발명은 수거된 쓰레기를 분쇄하는 1차분쇄공정과, 분쇄된 쓰레기를 열건조로에 투입하여 소각성 쓰레기는 소각시키고 비소각성 쓰레기는 건조시키는 1차 건조공정과, 건조된 쓰레기에 탈취제와 건축폐골재를 혼합하는 혼합공정과, 혼합물을 1-5cm범위로 분쇄하는 2차 분쇄공정과, 혼합물의 표면에 포함된 수분을 건조시켜 제거하는 2차건조공정과, 2차건조공정에 의해 얻어지는 혼합물에 모르타르를 혼합하는 모르타르혼합공정과, 혼합물을 블록성형틀을 사용하여 일정한 크기로 성형하는 성형공정과, 성형된 블록을 건조시키는 공정에 의해 매립용 블록으로 제조하는 것을 특징으로 하는 쓰레기의 재활용처리방법을 제시한다. 
     본 발명은 쓰레기를 블록형태로 처리하여 매립용으로 재활용할 수 있는 방법을 제시함으로서 종래 소각처리될 때의 막대한 처리비용을 줄일 수 있고, 쓰레기 매립장에 매립처리될 때 발생하는 부지확보상의 문제와 침출수에 의한 2차적 환경오염문제를 해소할 수 있으며, 쓰레기를 매립용으로 재활용하거나 저렴한 비용으로 인공산등을 조성할 수 있는 효과를 갖는다.
Patent KR-19990029952-A (KR)
Title: 가변 용량형 펌프
IPC: F04C2/344
Filed: 1998-09-18
Abstract: 베인(33a)을 갖는 회전자(33)에 장착되어 외주면으로부터 펌프실(36)을 형성함으로서, 축선방향을 따라서 배치시킨 스윙 핀(35)을 지점으로서 사용하여 캠링(34)을 스윙할 수 있게 지지하여 중간 몸체로서 기능하는 캠 케이스(23)를 제공한다.  축선방향으로 이 캠 케이스의 양단부에 펌프 몸체들이 배치된다.  더욱이, 회전자의 회전 샤프트(40)를 회전할 수 있게 지지하는 프론트 몸체(21) 및 리어 몸체(22)가 배치된다.  펌프의 토출부의 유체압력이 일정 압력 이상으로 된 때에 펌프의 흡입부로 릴리브시키는 릴리프 밸브(74)를 형성하는 밸브구멍(75)은 리어 몸체 내에서, 일단이 캠 케이스와의 접합면에 개구하는 블라인드 구멍이다.  밸브구멍 내에 받아들여진 밸브 구성부품(74a)은 캠 케이스의 접합면에 의해서 고정된다.
Patent KR-20000026465-A (KR)
Title: Method for selective-repeat automatic-repeat-request having dual modes for supplying radio data services
Inventor: KIM YEONG SEOP
IPC: H04B7/005
Filed: 1998-10-20
Abstract: PURPOSE: A method for a DSR ARQ(Dual-mode Selective-Repeat Automatic Repeat-request) is provided to improve a capacity of a data link layer protocol, and data transmissition for radio data services. CONSTITUTION: A method for a DSR ARQ(Dual-mode Selective-Repeat Automatic-Repeat Quest) for radio data services in a radio transmission/reception system comprises the steps of: transmitting frames in order until receiving a confirmed response from a radio receiver, and deciding whether the confirmed response is received in a normal mode, by a transmitter(step 1); releasing a buffer according to kinds of the confirmed response received by the transmitter, re-transmitting corresponding frames, and returning to the first step when the confirmed response is received(step 2); stopping transmission for a new frame when transmission buffers are full, caused by consecutive errors for one frame or loss of consecutive feedback information, while transmitting the frames in the first step, and returning to the first step after performing a recovery mode(step 3).
Patent KR-20000027600-A (KR)
Title: Multi-purpose button box assembly for tv set
Inventor: KIM TAE SEOK
IPC: H04N5/64
Filed: 1998-10-28
Abstract: PURPOSE: A multi-purpose button box assembly for a TV set is designed to make it easy to withdraw and insert a button box by providing a connecting box connected to the button box. CONSTITUTION: A multi-purpose button box assembly for a TV set includes a box coupling part(1), a connecting box(2) inserted into the box coupling part to be withdrawable, a button box(3) connected to the connecting box, a box rotating part rotably connecting the connecting box(2) to the button box, and a connecting box support for supporting the connecting box when the connecting box is withdrawn from a box insertion groove of the box coupling part. The box rotating part is provided with a fixing plate inserted into a fixing plate moving groove(14) formed on the connecting box.
Patent KR-20000031355-A (KR)
Title: Passage casing of drain pump for washing machine
Inventor: YUN CHEOL HO
IPC: D06F39/08
Filed: 1998-11-05
Abstract: PURPOSE: A passage casing is provided to prevent a cavitation event in a drain pump by removing an air gap showed by the casing passage of the drain pump for a washing machine. CONSTITUTION: A pump casing fills a flowing space(9A) if a drain flux drained through a hose(4A) from a washing tub(2) is gathered more or less. A form of an inlet(13A) received water passed the hose(4A) has an optional inclination to gather water inside the flowing space(9A). A passage is made in a point equaled or at least exceeded an 'HL' line of high water level as an upper area of the flowing space(9A) of the pump casing(11A). Thereby the flowing space(9A) is composed in an overflow state if a flux of drain waits in any period such as an early drain, an intermittent drain, a main dehydration and so on. A lacking event of an early flux and a generation of a cavitation during driving an impeller(12) to effect to a drain amount are prevented by making a condition filling water in the flowing space(9A) in the early driving step of the impeller.
Patent KR-20000031582-A (KR)
Title: Device for molding double-walled spiral pipe
Inventor: BYUN MOO WON
IPC: F16L9/133
Filed: 1998-11-07
Abstract: PURPOSE: A double-walled spiral pipe molding device is provided to maximize the productivity by performing the work of molding an inner and an outer pipes promptly and efficiently. CONSTITUTION: A cylindrical inner and an outer resins(2a',2b') are supplied continuously to be overlapped from the paths(A,B) for the inner and the outer resins of an inner and outer resin extrusion part(100). The outer resin is vacuum absorbed in a spiral molding groove(211) on the inner face of a molding drum(210) of an outer pipe molding part(200). The inner resin is extended by molding devices(320) of an inner pipe molding part(300) and is molded into an inner pipe(2a) touching to the outer pipe flat. Herein, the pressure endurance corresponding to the reacting strong inner pressure is promoted by removing a connecting part at the inner and the outer pipes(2a,2b) of a double-walled spiral pipe(2). And the molding work is performed promptly and efficiently. Thereby the productivity is improved.
Patent KR-20000031711-A (KR)
Title: Signal processing method for improving capacity of inter-working function in atm public network
Inventor: KIM JEONG HOON
IPC: H04L12/433
Filed: 1998-11-09
Abstract: PURPOSE: A signal processing method for improving a capacity of an IWF(Inter-Working Function) in an ATM public network is provided to reduce a signal processing delay of an IWF by simplifying a call processing procedure. CONSTITUTION: A signal processing method for improving a capacity of an IWF(Inter-Working Function) in an ATM public network comprises the steps of; performing a narrow band signal processing between a transmission PBX(Private Branch exchange) and a transmission IWF portion; searching an address of an ATM network related to a reception inter-working function portion; setting an ATM virtual connection channel by performing a B-SETUP, a B-CONNECT, and a B-CONNECT-ACK; transferring address processing information to a reception PBX; and transferring a response signal to the transmission PBX.
Patent KR-20000032429-A (KR)
Title: Optical connector
Inventor: KIM BEOM SU
IPC: G02B6/42
Filed: 1998-11-14
Abstract: PURPOSE: An optical connector is provided to make easy an alignment between an optical device and an optical fiber array and exclude the usage of subsidiary optical member such as the micro-lens array. CONSTITUTION: An optical connector comprises: an adapter(30) in which an optical device(21) and an electrode(23) are installed; a holder(50) in which an optical fiber array(60) for transmitting an incident light is installed; a housing(40) for coupling the adapter to the holder and thereby aligning an installing position of the optical device and the optical fiber array; and a coupling position deciding unit for deciding the coupling position of the adapter to the housing. The optical device comprises a light emitter for emitting light beams by a driving power applied through the electrode and a light receiving device that receives an incident light, converts the received incident light into an electrical signal and transfers the converted electrical signal through the electrode.
Patent KR-20000033510-A (KR)
Title: Vacuum fluorescent display
Inventor: YOO IL
IPC: H01J3/00
Filed: 1998-11-24
Abstract: PURPOSE: A vacuum fluorescent display is provided which realizes a high quality display by varying the realization colors in variety according to an applied voltage as to a specific segment or dot. CONSTITUTION: In order to increase the number of realizable colors and to realize the high quality display, a vacuum fluorescent display includes: a first and a second substrate; a filament(10) which is formed with a tungsten wire coated with an oxide and emits hot electrons when a voltage is applied, with both ends being fixed in the substrate to cross the inside of the substrate; an anode electrode(16) accelerating the hot electrons according to the voltage applying by forming a conductive film; and a fluorescent film(20) which is formed on the surface of the conductive film and radiates by receiving the hot electrons, and varies the radiation color according to the control of the applied voltage.
Patent KR-20000034190-A (KR)
Title: Shielding yarn of electronic waves, shielding fabric and production method thereof
Inventor: NA DO CHUN
IPC: D06M11/83
Filed: 1998-11-28
Abstract: PURPOSE: A shielding yarn and a shielding product are provided to have the fine shielding effect of electronic waves by producing the shielding yarn of electronic waves, mixing a nylon fiber plated by silver with wool or another fiber material in a spinning process or a mixing process and by producing the shielding fabric from the shielding yarn. CONSTITUTION: In producing a fabric for shielding electronic waves, shielding yarns of electronic waves are arranged to regularly weave as a weft or a warp. To shield the electronic waves over 30dB in a common frequency of 10-1000MHz, shielding yarns of electronic waves are located in an interval under 2mm. A number of weft or warp and a number of shielding yarn is arranged about 5: 1. In weaving a thick fabric such as a suiting, shielding yarn is located inside to prevent nylon yarn plated by silver being seen by naked eyes when shielding yarns are located outside.
Patent KR-20000037882-A (KR)
Title: Demodulation device of cable modem
Inventor: KIM JONG HAN
IPC: H04L9/18
Filed: 1998-12-02
Abstract: PURPOSE: A demodulation device of a cable modem is provided to perform an accurate demodulation received data and remove an interference between signals due to the reflection. CONSTITUTION: A demodulation device of a cable modem comprises a PN generator(300), a first multiplier(310), a first delay portion(320), a second delay portion(330), a second multiplier(340), a third delay portion(350), a fourth delay portion(360), a third multiplier(370), and an adder(380). The PN generator generates PN codes of predetermined bits. The first multiplier multiplies received data by an output from the PN generator. The first delay portion delays the output from the first multiplier as much as 2 bits. The second delay portion delays the output from the PN generator as much as 1 bit. The second multiplier multiplies reflected data by an output from the second delay portion. The third delay portion delays the output from the second multiplier as much as 1 bit. The fourth delay portion delays the output from the second delay portion as much as 1 bit. The third multiplier multiplies reflected data by an output from the fourth delay portion. The adders add the outputs from the first and the fourth delays and the third multiplier.