baber/WOPTO huggingface dataset:
Patent KR-910005404-B1 (KR)
Title: Manufacturing method of high quality bipolar tr
Inventor: KO JANG-MAN
IPC: H01L29/70
Filed: 1988-09-23
Granted: 1991-07-29
Abstract: The methdo for  minimizing  a  leakage  current  through  the neighborhood of the emitter and a leakage  current  by  turnelling between the emitter and the extrinisc base  region  comprises  the steps of forming a first oxide film  (1)  on  an  asctive  region, forming anitride film (2) and an oxide film (3) thereon  to  cover the emitter region and ion-implanting thereon; forming an undercut on the nitride film (2); masking the nitride film (2)  to  form  a field oxide film (11); removing the nitride film (2) and  the  pad oxide film (1) to perform a polysilicon (7)  deposition,  an  ionimplant and a metal deposition; and forming metallic layer (10).
Patent KR-920001929-B1 (KR)
Inventor: ANDERSON ROBERT K
IPC: D02J1/22
Filed: 1988-10-13
Granted: 1992-03-07
Abstract: 내용 없음.
Patent KR-910008036-B1 (KR)
Inventor: IRITANI HIROFUMI
IPC: B60K17/22
Filed: 1988-11-03
Granted: 1991-10-07
Abstract: 내용 없음.
Patent KR-920003258-B1 (KR)
Inventor: YUKIHIRO ONO
IPC: G03G15/00
Filed: 1989-01-20
Granted: 1992-04-25
Abstract: 내용 없음.
Patent KR-0155365-B1 (KR)
Inventor: VERHOEVEN LAURENTIUS M
IPC: H05K3/32
Filed: 1989-05-01
Granted: 1998-12-15
Abstract: 내용없음
Patent KR-0126675-B1 (KR)
Inventor: MASAYUKI CHATANI
IPC: G06V10/75
Filed: 1989-08-21
Granted: 1998-04-04
Abstract: 내용없음.
Patent KR-0156912-B1 (KR)
Inventor: FUCHS HUGO
IPC: C07C249/14
Filed: 1989-11-23
Granted: 1998-12-01
Abstract: 내용없음
Patent KR-930000721-B1 (KR)
Title: Radio receiver for detecting burst type carrier
Inventor: PARK CHAN-HYON
IPC: H04B1/16
Filed: 1989-11-30
Granted: 1993-01-30
Abstract: The system is a proprotion control receiver  to  receive  the burst type carrier that doesn't need continuous  reference  signal by using latch. The system protects crosstalk  and  increases  the sensitivity of servo motor. It includes  a  RF  receiving  section (1), a wave detecting section (2), a  coder  &  decoder  (30)  for latching the last data from a receiver and detecting the  data  of the channel corresponding to the secret code, a servo motor (M), a servo motor driver  (71),  a  feedback  data  generator  (73)  for controlling the  servo  motor  (M),  and  a  comparator  (50)  for controlling the servo motor driver (71).
Patent KR-950007013-B1 (KR)
Title: Internal circulation type fluidized bed boiler & method of controlling same
Inventor: OHOSIDA DAKAHIRO
IPC: B09B3/00
Filed: 1987-07-20
Granted: 1995-06-26
Abstract: An internal circulation type fluidized bed boiler in which a fluidized bed primary combustion chamber is formed by providing above the portion of an air distributing plate from which the air having a higher mass velocity is ejected an inclined partition wall which is adapted to intercept an upward flow of the fluidization air ejected from this air ejection portion, and turn this upward flow of the air toward the position above the portion of the air distributing plate from which a gas having a low mass velocity is ejected, with a heat recovery chamber formed between the inclined partition wall and a furnace wall. The inclined partition wall is formed so as to have an angle of inclination of 10 DEG -60 DEG  with respect to a horizontal plane, and a horizontal projection length of 1/6-1/2 of the horizontal length of the furnace bottom. The method of controlling this fluidized bed boiler consists of the steps of controlling the quantity of heat recovered from the heat recovery chamber in compliance with the request by the users of recovered heat by suitably regulating the flow rate of the air ejected from a diffuser for the heat recovery chamber, and controlling the feed rate of the fuel supplied to the fluidized bed primary combustion chamber, on the basis of the temperature of the fluidized bed primary combustion chamber.
Patent KR-0138259-B1 (KR)
Inventor: AMIR ISRAEL
IPC: H05K13/08
Filed: 1990-02-23
Granted: 1998-06-15
Abstract: 내용없음
Patent KR-940000394-B1 (KR)
Inventor: AMOROSO FRANK
IPC: H04K3/00
Filed: 1990-04-16
Granted: 1994-01-19
Abstract: 내용 없음.
Patent KR-940006665-B1 (KR)
Title: Manufacturing method of depositing film and semiconductor device
Inventor: OMI KATSUAKI
IPC: H01L21/285
Filed: 1990-09-26
Granted: 1994-07-25
Abstract: A deposited film formation method comprises the steps of:   (a) feeding a gas of an organometallic compound containing molybdenum atom and hydrogen gas onto a substrate having an electron donative surface; and (b) maintaining the temperature of the electron donative surface within the range of the decomposition temperature of the organometallic compound or lower and 800  DEG C or lower to form a molybdenum film on the electron donative surface. s
Patent KR-920008583-B1 (KR)
Title: The treating agent of fiber for filter of stationery
Inventor: KWON I-SONG
IPC: D06M13/256
Filed: 1990-09-27
Granted: 1992-10-01
Abstract: Fiber treatment agent of formula (I) comprises  ethoxy  fatty acid 40-56 wt.%, ethoxy fatty alcohol of formula (II) 40-56  wt.%, and metal alkyl  phosphate  and  alkyl  sulphonate  3-8  wt.%.  In formula (I), R1 is hydrogen, C1-C10 alkyl, alken,  or  alkyn,  and m,n are 2-10 integer (12 <= m+n <= 20). In  formula  (II),  R2  is hydrogen, C1-C10 alkyl, alken, alkyn and a,b,c and d are  integers (12 <= a+b+c+d    <= 20). Treatment gives the  fiber  for  stationary filter more water absortion and good smoothing between  the  fiber and fiber  or  fiber  and  metal,  and  improves  touch  feel  and immersion wetting.
Patent KR-950002127-B1 (KR)
Title: Control method of leveling work for excavator
Inventor: LEE JIN-HAN
IPC: E02F9/20
Filed: 1990-12-29
Granted: 1995-03-13
Abstract: The method for automatically controlling the ground grading by using a dipper stick cylinder (8) and a swing motor (10), controls a dipper stick cylinder (14) and a boom cylinder (16). The method comprises the stone: memorizing manipulating degrees (θSP, θDS, θSW, θBK, θBO), vehicle body angle (θBD), inclined angle (θw) of the grading surface at the actuators (6,8,10,12,14,16) of an excavator; calculating the input inclined angle (θw) to the inclined angle (θ'w) against the vehicle body; calculating and outputting the respective compensated manipulating degrees (θBKO, θBMO) of bucket/boom cylinders (14,16) according to the manipulating degrees (θDS, θSW) of the cylinder (8) and the motor (10) not to separate the bucket bottom face from the grading surface.
Patent KR-950003773-B1 (KR)
Inventor: NAKAHAMA HIDENARI
IPC: H01H35/34
Filed: 1990-10-05
Granted: 1995-04-18
Abstract: 내용 없음.
Patent KR-960000510-B1 (KR)
Inventor: TSUBOKURA YUTAKA
IPC: C08F287/00
Filed: 1989-07-28
Granted: 1996-01-08
Abstract: 내용 없음.
Patent KR-960014097-B1 (KR)
IPC: A61P43/00
Filed: 1989-11-07
Granted: 1996-10-14
Abstract: 내용 없음.
Patent KR-950010818-B1 (KR)
Title: Expression of proteinaceous sweeteners in yeast
Inventor: CHO JUNG-MYONG
IPC: C12N15/29
Filed: 1989-12-29
Granted: 1995-09-23
Abstract: A yeast expression system is provided for expressing novel protein sweeteners. The construct provides for secretion of the protein sweeteners into a form which can be readily purified and isolated, providing an active product.
Patent KR-930007321-B1 (KR)
Title: Method and apparatus for employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cables
Inventor: RIPPINGALE JOHN L
IPC: G01V3/08
Filed: 1990-02-07
Granted: 1993-08-05
Abstract: In order to locate, trace, and identify hidden elongated objects, such as buried fiber optic cables, the objects are provided with elongated permanent magnet identifier devices having magnetic fields that may be detected at a distance from the objects. In one embodiment the identifier device comprises an elongated strip magnetized in the direction of its width and formed into a long-pitch helix, producing a characteristic "magnetic field signature" that enhances detection and identification of the object, as by a portable gradiometer that is moved over the surface of the earth along a line generally parallel to the length of the object. This embodiment may provide a magnetic field that diminishes as the square of the distance from the identifier device (rather than the usual cube of the distance), thereby enabling detection at substantial distances. In a second embodiment distinctive magnetic field signatures are produced by arrays of spaced permanent magnets, the fields of which add and subtract to provide resultant magnetic fields with peaks and valleys along a line generally parallel to the length of the object.
Patent KR-930008041-B1 (KR)
Inventor: SATO YASUO
IPC: G06F21/72
Filed: 1991-03-27
Granted: 1993-08-25
Abstract: 내용 없음.
Patent KR-0168648-B1 (KR)
Title: Bis(alkyl-substituted-4-hydroxyphenylthio)alkane analogs as inhibitors of aractogenesis
Inventor: SIMON J T MAO
IPC: A61K31/10
Filed: 1991-05-08
Granted: 1999-01-15
Abstract: This invention relates to a method of inhibiting the development of a cataract in a patient in need thereof comprising administering to said patient an effective cataract inhibitory amount of a bis(alkyl-substituted-4-hydroxyphenylthio)alkane analog.
Patent KR-930005318-B1 (KR)
Title: Process for preparation of alumina sol
Inventor: IM KYONG-RAN
IPC: C01F7/02
Filed: 1991-06-11
Granted: 1993-06-17
Abstract: The polymeric alumina sol is produced by reacting 1 mole aluminium alkoxide with 1-4 mole formic acid and 20-70 mole distilled water at 60-80 deg.C for 0.3-3 hr. The aluminium alkoxide is pref. aluminium isobutoxide or aluminium isopropoxide. The spinnable alumina sol is useful for coating ceramic powers.
Patent KR-930009704-B1 (KR)
Title: Semiconductor device with chip select pair
Inventor: KIM KI-HONG
IPC: G11C8/12
Filed: 1991-09-07
Granted: 1993-10-08
Abstract: The device includes a decoding logic mean  (40)  having  chip select pairs (CS1, bar CS1 - CSn,  bar  CSn)  connected  to  outer input taps selectively to select the single chip corresponding  to the logical combination of  the  extended  address.  The  decoding logic means comprises a number of inner logic means (30-1 -  30-N) which number is same to  the  selected  chips,  and  an  AND  gate multiplying the outputs of the inner logic means logicaly.
Patent KR-950008792-B1 (KR)
Inventor: ENDO TORU
IPC: G05F3/22
Filed: 1991-09-17
Granted: 1995-08-08
Abstract: 내용 없음.
Patent KR-0147853-B1 (KR)
Inventor: LIU ALBERT CHENG YU
IPC: B01J37/06
Filed: 1991-10-11
Granted: 1998-08-17
Abstract: 본 발명은 은-함유 지지체, 및 코발트 성분을 함유하지 않은 유사한 촉매와 비교하여 활성 및/또는 효능 및/또는 안정성중 적어도 하나를 증진시키기에 충분한 양의 코발트 성분을 포함하는, 산소와 알켄의 에폭시화에 의해 알킬렌 옥사이드를 제조하기 위한 촉매에 관한 것이다.
Patent KR-950002936-B1 (KR)
Inventor: KIMURA SHIGENORI
IPC: B60L7/28
Filed: 1991-11-20
Granted: 1995-03-28
Abstract: 내용 없음.
Patent KR-950005983-B1 (KR)
Title: Data processing method
Inventor: YE BYONG-HO
IPC: H04M3/22
Filed: 1991-12-17
Granted: 1995-06-07
Abstract: The interactive data path is constructed between a user's terminal and a exchange so that the data concerning registration, transmission line change etc., are processed in an interactive way. The method comprises the steps of; (A) checking the structure and normality of corresponding data when a data process request signal is received; (B) checking the corelation of corresponding data and displaying the data on a screen; (C) renewing data base corresponding to data renewing request signal transmitted from a user and displaying the result; and (D) resetting a sereen and storing data related to database renewal.
Patent KR-940004820-B1 (KR)
Title: Method of slag making
Inventor: SONG HYO-SOK
IPC: C21C5/54
Filed: 1991-12-30
Granted: 1994-06-01
Abstract: The method is characterized by melting stainless steel in an induction melting furnace, putting a slag into the surface of the molten steel, melting the slag at 1700-1720 deg.C, adding a serestite as a slag-pulverization preventing agent to the refining furnace, and adding Cr oxide and Fe-Si to the furnace.
Patent KR-0163057-B1 (KR)
Title: Signal equalizing method employing test sequences
Inventor: OTTO KLANK
IPC: H04L25/03
Filed: 1990-06-01
Granted: 1998-12-01
Abstract: PCT No. PCT/EP90/00873 Sec. 371 Date Jan. 27, 1992 Sec. 102(e) Date Jan. 27, 1992 PCT Filed Jun. 1, 1990 PCT Pub. No. WO90/15495 PCT Pub. Date Dec. 13, 1990.In order to equalize digitally coded signals, predetermined test sequences are transmitted before useful data is transmitted. The test sequences are correlated with an identical test sequence stored in the receiver and the result of the correlation, in the form of a channel pulse response correlation spectrum, is used to control filter coefficients of a receiver filter arrangement to simulate an inverse transfer function of the transmission channel.
Patent KR-940004374-B1 (KR)
Title: Filter cleaning circuit of vacuum cleaner
Inventor: LEE SANG-SU
IPC: F25D17/06
Filed: 1992-02-21
Granted: 1994-05-23
Abstract: absorbing dust by driving a main motor and displaying cleaning time on a display device; removing dust of a dust filter by driving an auxiliary motor and displaying dust removing time on the display device; and settling dust and displaying the dust removing time on the display device, thereby extending the exchange time of the filter.
Patent KR-100254487-B1 (KR)
Title: Caption print apparatus of vcr and its control method
Inventor: LEE EUN PYO
IPC: G11B20/00
Filed: 1992-04-17
Granted: 2000-06-01
Abstract: PURPOSE: An apparatus for printing caption data of a VCR is provided to print caption data according to the user's selection by transmitting them through an interface after converting caption data into print-formatted data. CONSTITUTION: A VCR(3) includes a micro processor(3A) performing a format conversion of caption data and controlling a printer in response to a print control signal input. Under the control of the micro computer(3A), a caption controller(2) performs a caption data processing, and an interface(4) transmits the caption data to a printer(5). Then, the printer(5) prints the caption data with letters. Herein, the interface(4) is composed of a data buffer(4A) storing the caption data temporarily, and an output port(4B) connecting to the printer(5).
Patent KR-950000754-B1 (KR)
Title: Driving method and vias voltage circuit of strong dielectric lcd using stn driving i. c.
Inventor: KIM YONG-HO
IPC: G02F1/133
Filed: 1992-04-30
Granted: 1995-01-28
Abstract: applying the second pulse, opposite to the first polarity so as to turn the ferroelectric LCD to the first status after adding the first pulse with the first polarity; making the ferroelectric LCD the second status by the third pulse after applying the fourth pulse, which has the second polarity opposite to the first and doesn't change the status of LCD, after applying the third pulse; and applying two kinds of pulse waveforms, one being a phase conversion from the first to the second polarity and the other from the second to the first polarity, depending on the desirable picture data to be displayed.
Patent KR-960011444-B1 (KR)
Title: Variable intake apparatus
Inventor: KIM YUN-SUK
IPC: F02M35/10
Filed: 1992-08-24
Granted: 1996-08-22
Abstract: The device improves fuel economy and provides high power over all ranges of engine speeds in a leanburn engine. An intake pipe(2) for guiding air into a combustion chamber from a surge tank is divided into a pipe(4) for low speed and a pipe(5) for high speed. A rotary impeller(7) rotating in case of high speed driving and a rotary valve plate(8) activated by a variable device(10) are installed in the pipe(5) for high speed to bring into strong tumble and swirl. At low speed driving the pipe(4) for low speed is open to induce swirling and consequently high power and at high speed driving, the impeller(7) rotates to intake more air into the pipe(5) for high speed and the valve plate(8) begins to rotate, which causes tumbling and swirling.
Patent KR-970003741-B1 (KR)
Inventor: MATSUDA KUNIHIRO
IPC: H01L21/60
Filed: 1992-09-04
Granted: 1997-03-21
Abstract: 요약 없슴.
Patent KR-100191059-B1 (KR)
Title: Bow for a string instrument
Inventor: ROLLAND BENOIT MARIE PIERRE
IPC: G10D3/16
Filed: 1991-11-19
Granted: 1999-06-15
Abstract: PCT No. PCT/FR91/00911 Sec. 371 Date Jul. 10, 1992 Sec. 102(e) Date Jul. 10, 1992 PCT Filed Nov. 19, 1991 PCT Pub. No. WO92/09068 PCT Pub. Date May 29, 1992.A bow equipped with an improvement enabling adjustment of its rigidity. According to the invention, a longitudinal recess is made in the stick of the bow and this recess encloses a core stiffener linked to a screw-nut system (26-27) actuated by a knob (32). The stick can, for instance, be of molded synthetic material.
Patent KR-0168688-B1 (KR)
Title: Oral collection for immunoassay
Inventor: GOLDSTEIN ANDREW S
IPC: G01N33/68
Filed: 1991-02-27
Granted: 1999-05-01
Abstract: A method and device for collecting immunoglobulins and other analytes from the oral cavity for immunological and other testing. The device is a treated absorbent pad used to collect a specimen having a high concentration of immunoglobulins or other analytes. The specimen can be subjected to a basic immunological testing technique which can be used as a tool for screening a patient for diseases. A test kit is also provided.
Patent KR-960006856-B1 (KR)
Title: High strength biomaterial for implant, and the manufacturing method
Inventor: CHO JUNG-SIK
IPC: A61K6/02
Filed: 1993-01-11
Granted: 1996-05-23
Abstract: The biomaterial is prepd. by (1) powder-sintering the glass powder contg. 39-42 wt.% SiO2, 10.5-13 wt.% P2O5, 40-45 wt.% CaO and 5.5-7.5 wt.% Na2O, (2) adjusting amount and species of glass-ceramics for good bioactive, reducing amount of Na2O for good strength and increasing amount of CaO, and (3) smashing the glass powder into 325 mesh or less and sintering only one step at 950-1050 deg. C for 1-10hrs. The High strength biomaterial is obtained because it's not porous.
Patent KR-100286321-B1 (KR)
Title: Input circuit for receiving ras signal
Inventor: KIM UNG HUI
IPC: H03K17/00
Filed: 1993-01-21
Granted: 2001-04-16
Abstract: PURPOSE: An input circuit for receiving a RAS signal is provided to perform a circuit analysis and an error analysis by inputting the RAS signal to a chip regardless of back bias voltage. CONSTITUTION: A signal transfer portion(1) is used for transferring a RAS signal to a chip. An edge detection portion(3) is used for receiving the RAS signal and a CAS signal, delaying the CAS signal, and detecting a rising edge and a falling edge of the CAS signal. A latch portion(4) is used for latching a rising edge signal and a falling edge signal from the edge detection portion(3). A NAND gate(NAND4) is used for outputting a RAS enable signal(RAS-EN) to an inverter(I12) by performing a NAND combination process for an output signal and a control signal of the latch portion(4). An NMOS transistor(MN1) is used for controlling a transferring process of the RAS signal of the signal transfer portion(1) according to an output signal of the NAND gate(NAND4).
Patent KR-950003740-B1 (KR)
Inventor: ANDO HIROMITSU
IPC: F02B25/14
Filed: 1993-02-27
Granted: 1995-04-18
Abstract: 내용 없음.
Patent KR-950014655-B1 (KR)
Title: Composite for grain biscuit
Inventor: PARK KYONG-JUN
IPC: A23G3/00
Filed: 1993-03-13
Granted: 1995-12-13
Abstract: The cereal biscuit composite is prepd. by mixing cereal mixt., 1-30 wt% cellulose, 1-27 wt% sweetener and spice, and heat-treating at 90-130 deg. C and 0.5-2.0 atm.. The cereal mixt. contains 5-20% gelatinated dried glutinous rice(10-100 mesh), 20-40% barley, 5-30% unpolished rice, 2-20% adlay, 2-20% black bean, 5-40% corn, 1-10% wild sesame and 1-10% black sesame. The cellulose is selected from polydextrose, guar gum, psyllium husk and pine fiber. The sweetner is selected from sucrose, sorbitol and oligosaccharide.
Patent KR-950009531-B1 (KR)
Title: Compact type display device driving circuit
Inventor: JANG KYE-ON
IPC: G09G3/36
Filed: 1993-04-14
Granted: 1995-08-23
Abstract: The circuit for driving a display device has a simple structure and a minimized area so that the circuit can be easily formed in a control IC. The circuit comprises a first latch for latching data to be displayed, a latch controller for controlling the first latch, a second latch for latching data transmitted from the first latch, and a data transmitter for transmitting data latched by the second latch to a display device.
Patent KR-100305083-B1 (KR)
Title: Semiconductor device having function for changing over switching circuit
Inventor: NISHIMAKI TATSUO
IPC: H03K19/173
Filed: 1993-07-03
Granted: 2001-11-22
Abstract: PURPOSE: A semiconductor device having a function for changing over a switching circuit is provided to reduce chip size and form of a PROM of mask options of a mask ROM. CONSTITUTION: A semiconductor device in which not only mask options of a mask ROM can be provided in the form of a PROM but the chip size can be reduced, and an electronic appliance using the same. The semiconductor device comprises a nonvolatile storage device(12) writable electrically, and switching circuits(18, 20) controlled on the basis of data stored in the nonvolatile storage device to perform wiring switching. Because wirings A, B1 and B2 are switched on the basis of data stored in the nonvolatile storage device, for example, optional functions of a one-chip micro computer can be provided in the form of a PROM by using the wiring switching.
Patent KR-970006285-B1 (KR)
Inventor: YOSHIDA YASUHIRO
IPC: B41J2/36
Filed: 1993-09-27
Granted: 1997-04-25
Abstract: 내용 없음.
Patent KR-0180372-B1 (KR)
Inventor: CHON DONG-KI
IPC: B60G3/26
Filed: 1993-10-05
Granted: 1999-03-20
Abstract: 더블 위시본 현가장치에서 캠버의 조정작업이 용이하고, 조정후의 상태가 외부의 충격 등에 의해 변동되는 일이 없게 하고자, 새시 프레임(2)의 브라케트(4)에 상부아암(14)의 종단부를 요동 가능하게 지지시키는 체결수단(18)을, 상기한 브라케트(4)의 길이방향으로 뚫려진 관통공(8)의 중심과 편심되는 위치로 각각 소정 직경의 축공(12a)(12b)이 형성되어 있는 1쌍의 디스크부재(10a)(10b)로 지지시킴과 동시에 이들 디스크부재(10a)(10b)를 브라케트(4)의 양측면에 형성된 가이드(6)로 긴밀하게 삽입 장착시켜서 이들 디스크부재(10a)(10b)의 회동에 의해 상기한 체결수단(18)의 축 지지위치가 이동 조절되게 한 더블 위시본 현가구조의 캠버 조절장치.
Patent KR-970006651-B1 (KR)
Inventor: MATSUDA TETSUO
IPC: G07F11/04
Filed: 1993-10-27
Granted: 1997-04-29
Abstract: 내용없음.
Patent KR-960003703-B1 (KR)
Title: Carrying apparatus of tray for cdp
Inventor: CHOE YOUNG-SUK
IPC: G11B17/04
Filed: 1993-11-11
Granted: 1996-03-21
Abstract: The disc loading device comprises a tray (20) and a tray holder (22). The tray has bending parts on both sides provided with rib guide grooves (30) at the bottom side. A guide strap part is formed on one side of the tray over the second bending part. The tray holder(22) has its side walls bent inside and provided with spotting ribs (28) on both sides to form track. The tray is loaded into the tray holder from the front side, by engaging the rib guide grooves of tray with spotting ribs of tray holder. Thus, the tray slides over the track of tray holder with the help of a transportation gears stick. The transportation gears stick comprises an upper transportation roller (36) and a lower transportation roller (36'). The transportation rollers are attached to upper and lower sides of guide strap part of tray, and is driven by a driving unit.
Patent KR-100295316-B1 (KR)
Title: 과전압보호기능을지니는저전압입력및출력회로
IPC: H03K19/003
Filed: 1993-12-21
Granted: 2001-09-17
Abstract: 5 볼트 미만의 공급전압을 포함하는 어느 바람직한 공급전압(VCC)과 함께 사용하기에 적합하며, 입력 패드에 인가된 VCC보다 큰 과전압 입력신호에 견딜 수 있는 입력단이 개시되어 있다. 통과 트랜지스터는 입력 패드와 입력 버퍼사이에 사용되어 입력 버퍼에 공급되는 전압을 제한함으로써 VCC를 초과하는 전압이 입력 버퍼에 대한 진정한 논리 1 입력 신호로서 사용될 수 있게한다. 출력단은 5 볼트 미만의 공급 전압을 포함하는 폭넓은 여러 공급전압과 함께 사용하기에 적합하며, 출력패드에 진정한 과전압이 인가될 경우에 적합한 동작을 허용한다. 정전 방전(ESD)보호는 최대의 진정한 과전압보다 큰 전압으로 출력패드상에 걸린 전압을 제한하기 위해 제공된다. 캐스코드(cascode)디바이스는, 진정한 과전압이 출력패드에 인가될 경우에 풀업 및 풀다운 트랜지스터에 의해 발생되는 전압을 제한하는데 사용된다. 출력단이 고 임피던스 모드나 활성 상태의 고 레벨 모드에 있을 때 진정한 과전압이 출력 패드에 외부적으로 인가될 경우 과잉 전류가 소산되는 것을 방지하는데 적합한 트랜지스터 스위치가 사용된다.