baber/WOPTO huggingface dataset:
Patent KR-920006251-B1 (KR)
Title: Level shift circuit
Inventor: PARK YONG-BO
IPC: H03K19/0185
Filed: 1989-10-26
Granted: 1992-08-01
Abstract: The level converter for  converting  a  TTL  level  of  input signal to a CMOS level comprises a NOR gate circuit (1), including a first voltage pull-up PMOS transistor (PI2), to  which  the  TTL signal is inputted, an inverter (INV) connected to  the  NOR  gate circuit, and a speed control circuit (2). The NOR gate circuit has a PMOS (PI1) and an NMOS (NI1)  controlled  by  a  control  signal (CS), as well as a CMOS transistor  (PI2,  NI2)  fed  by  the  TTL signal. The speed  control  circuit  includes  a  second  voltage pull-up PMOS transistor (PI4). The two transistors  (PI2,PI4)  are connected in parallel between VCC and the input to the inverter. A fast conversion  speed  is  obtained  by  turning  on  both  PMOS (PI2,PI4) when the TTL signal goes from the high level to the  low level.
Patent KR-960002664-B1 (KR)
Inventor: PHILLIPS EARLE N
IPC: H01J31/50
Filed: 1989-10-27
Granted: 1996-02-24
Abstract: 내용 없음.
Patent KR-920001826-B1 (KR)
Title: Plasma display panel
Inventor: KWON KI-DUK
IPC: H01J11/32
Filed: 1989-12-30
Granted: 1992-03-05
Abstract: The plasma  display  device  for  supplying  uniform  charged particles and for reducing a discharge start voltage  comprises  a front grass substrate (1),  a  number  of  anode  electrodes  (13) formed by depositing an indium tin oxide  film  on  the  substrate (1), isolating walls (15)  formed  between  the  anode  electrodes (13), a rear glass substrate (2),  voltage  leading  lines  (6,6') with discharge electrodes (7,7'), the electrodes (7,7') acting  as charged particle generating source, a reset electrode (16)  formed so as to generate second uniform charged particles, and  a  number of cathod electrodes (17) formed by depositing an indium tin oxide film on the rear substrate (2).
Patent KR-920008314-B1 (KR)
Title: Method of coating film on the panel of crt
Inventor: KIM JONG-KWANG
IPC: H01J29/88
Filed: 1990-05-10
Granted: 1992-09-26
Abstract: The method applies a coating agent on a pannel of  a  cathode ray tube to prevent the pannel  from  being  charged  with  static electricity and to reduce light reflection. The  method  comprises the steps: (A) spraying the coaling agent on the outer surface  of the pre assembled pannel rotating at 80-250 rpm; and  (B)  heating the pannel at the temperature of 450 deg.C to improve the strength of the coated layer.
Patent KR-940005918-B1 (KR)
Inventor: IKAI KATSUSHIGE
IPC: C07C277/08
Filed: 1990-05-28
Granted: 1994-06-24
Abstract: 내용 없음.
Patent KR-970005576-B1 (KR)
Inventor: AOKI MASAYUKI
IPC: H05B6/66
Filed: 1990-05-28
Granted: 1997-04-17
Abstract: 내용 없음.
Patent KR-920010541-B1 (KR)
Title: Material punch equipment of block band for wrist watch
Inventor: YUN HO-JIN
IPC: B26F1/00
Filed: 1990-06-26
Granted: 1992-12-05
Abstract: The device automatically  performs  second  drilling  on  the block band of watch after first  drilling.  The  device  comprises main body (10) mounted on base plate  (5);  material  feed  device (20) for  adjusting  distances  between  holes  on  material  (2) provided in jig (90); free feed device (40) for freely feeding the material (2); clamping device (50) for compressing  the  material; jig feed device  (60)  for  positioning  the  material;  drilling devices (70) (70') for drilling holes.
Patent KR-940004883-B1 (KR)
Title: Stabilizer of lactobacillus powder
Inventor: LEE HYON-SU
IPC: A23C9/123
Filed: 1990-07-02
Granted: 1994-06-04
Abstract: The method for preparing stabilized Lactobacillus powder comprises (a) culturing Lactobacillus to separate microorganisms; (b) adding a stabilizer in the ratio of 3-10 wt.% to the microorganism wt.; (c) freeze-drying the mixture of microorganism and stabilizer; and (d) obtaining dryed Lactobacillus powder. The stabilizer comprises 10-50 wt.% of skim milk powder hydrolysate hydrolyzed by protease in the presence of Na3HPO4 at neutral pH, 10-50 wt.% of sugar, 3-10 wt.% of lactose and 3-10 wt.% of skim milk powder.
Patent KR-0128990-B1 (KR)
Inventor: MENDE TAKAYUKI
IPC: D04H1/56
Filed: 1990-07-18
Granted: 1998-04-09
Abstract: 내용 없음
Patent KR-0155160-B1 (KR)
Inventor: KIM HAK-JOO
IPC: C12N1/20
Filed: 1990-07-18
Granted: 1998-10-15
Abstract: 내용없음.
Patent KR-940005740-B1 (KR)
Inventor: KINOSHITA HIDEAKI
IPC: H01L29/06
Filed: 1990-09-27
Granted: 1994-06-23
Abstract: 내용 없음.
Patent KR-930005743-B1 (KR)
Title: Method for fabricating a trench capacitor cell
Inventor: RA SA-KYUN
IPC: H01L27/108
Filed: 1990-11-13
Granted: 1993-06-24
Abstract: The trench capacitor cell having an improved step coverage is mfd. by (a) forming a well (2) and a trench field oxide  film  (3) on the substrate (1), (b) forming a gate oxide film  (4),  a  gate polysilicon (5) and a HTO (6) for capping a gate,  patterning  it, and then implanting  N-  ion,  (c)  forming  a  trench,  and  then implanting P- ion using a trench mask (7),  (d)  etching  th  HTO, forming a side wall on the side surface  of  the  trench  and  the gate, and then implanting N+ ion, (e) forming  a  polysilicon  (9) for a bottom electrode, patterning it using  a  photoresist  (10), and then lifting off the photoresist, and (f) forming a dielectric material (11) on the polysilicon (10), forming a polysilicon  (12) for a top electrode, and then patterning it.
Patent KR-930003196-B1 (KR)
Title: Making method for cable and resin composition
Inventor: KIM YU-HWAN
IPC: H01B3/44
Filed: 1990-12-31
Granted: 1993-04-23
Abstract: The thin polyvinylidene fluoride cable  is  manufactured  by: coating the polyolefin based mixture of  0.114  mm  of  insulating thickness as  inner  coating  layer;  coating  the  polyvinylidene chloride mixt. as outer coating layer; then  finally,  only  once, radiation- crosslinking  of  that.  The   polyvinylidene   fluoride electrical cable is mafd. by the tube type cable extrusion process using  with kynar  730  prepd.  by  emulsion  polymerization  and polyvinylidene fluoride of solef 1006 grade prepd.  by  suspension polymerization. Pref. the inner layer of polyolefin contains  6-10 wt.% of triaryl isocyanurate (TAIC) as crosslinking assistant, and the outer layer of polyvinylidene fluoride contains  2-5  wt.%  of TAIC.
Patent KR-930006896-B1 (KR)
Title: Data input/output distribution system
Inventor: YO HWAN-KUN
IPC: H04M3/22
Filed: 1990-12-31
Granted: 1993-07-24
Abstract: The  apparatus  controls  data  input  and  output  path  to multipurpose I/O units such as magnetic tape  unit  or  hard  disk unit. The circuit comprises a FIFO input  selection  circuit  (11) for selecting data input according to the input  selection  signal transmitted from an I/O controller (10), a  FIFO  memory  (7)  for storing data selected by the FIFO input selection circuit (11),  a FIFO output selection circuit (12) for selecting  output  data  of the FIFO memory (7), an I/O bus input selection circuit  (13)  for selecting bus between I/O bus A or I/O bus B to send data  of  I/O units  (A,B),  an  I/O  bus  output  selection  circuit  (14)  for generating and transmitting output selection  signals  (SEL1-SEL2) to the FIFO output selection circuit, and I/O A,B units (4,4') for transmitting and receiving I/O data from multipurpose I/O units.
Patent KR-930007093-B1 (KR)
Title: Method of exposing a fluoke-screen of color crt
Inventor: LEE UN-U
IPC: H01J9/227
Filed: 1991-03-13
Granted: 1993-07-29
Abstract: The method comprises exposing the photosensitive layer, which is coated on the inside of screen glass (1), to the light of light source (5) which passes the exposing lens (4) and  then  the  open hole of shadow mask (3). The pixels of fluorescent substances  are prepared by exchanging the exposing lens for black  matrix  pixels for the exposing lens  which  has  a  size  corresponding  to  the thickness of the photosensitive  layer.  The  lens  thickness  for fluorescent pixels is 0.77-1.90 mm thicker  than  that  for  black matrix pixels. The method can minimize the matching deviation  and improve the productivity.
Patent KR-930008566-B1 (KR)
Title: Tuning apparatus for original sound of electronic musical instruments
Inventor: YUN DU-SU
IPC: G10H1/02
Filed: 1991-03-18
Granted: 1993-09-09
Abstract: The device comprises an octave detector (1) for decoding  the table length data (L0,L1,L2) supplied to a sound source IC from  a micom to detect octaves, comparators (2-1 to  2-8)  for  comparing with  a reference  number   the   key   number   under   pressing corresponding to a note for the octave detected  by  the  detector (1), reducers (3-1 to 3-5) and adders (4-1 to  4-6)  for  reducing and adding to the deviation data (DEV)  the  regulated  values  of reduction  or  addition  by  the  output  of  comparators,  and  a frequency table ROM (5) for outputting module value  to  count  in response to a  certain  frequency  clock  by  the  output  of  the reducers or adders. The device regulates the values given  to  the comparators and reducers and adders to suitable values for  tuning the regular rhythm by the number of bits for the frequencies given by clocks and the micom.
Patent KR-940001702-B1 (KR)
Title: Dual-writing device and method using latches
Inventor: CHON BYONG-CHON
IPC: H04M3/42
Filed: 1991-05-25
Granted: 1994-03-05
Abstract: The data, the address, and the control signal of a processor are latched until a write mode of an other side processor is completed and a process cycle is quitted when a write mode of a processor is completed so that the time necessary to write data on a memory is shortened. The apparatus includes an address decoder (44) for decoding an address signal transmitted through an internal bus (51) an MPS bus interface (46) for interfacing an internal bus and an MPS bus, an error decoder (52) connected to a processor (43), the internal memory (45) and the MPS bus interface (46), and an address latch (64) connected to the internal bus (51) and the error decoder (52) to latch an address and an error signal when an error occurs in the MPS bus interface (46) and the memory on the other side.
Patent KR-0137760-B1 (KR)
Inventor: MATSUNO SHIGEHIRO
IPC: G02B6/44
Filed: 1991-06-13
Granted: 1998-06-15
Abstract: 섬유 강화 플래스틱 외장 케이블의 제조에 있어서, 길이가 긴 강화섬유들은 비경화 열경화성 수지로 함침되고 열경화성 수지가 경화되지 않은 상태에서 다수의 로드형 부재들을 얻기 위해 소정형상으로 성형되며, 상기 비경화 로드형 부재들은 용융 압출기의 다이를 관통 통과되어 열가소성 수지층으로 각각 코팅된다. 로드형 부재들의 코팅층들은 열경화성 수지가 경화되지 않은 상태에서 다수의 섬유 강화 플래스틱 외장 가닥들을 동시에 성형하기 위해 즉각적으로 냉각된다. 상기와 같이 마련된 외장 가닥들은 회전되면서 공급되는 케이블 둘레로 권사된다. 둘레에 권사된 가닥들을 갖는 케이블은 용융 압출기의 다이 부분을 관통 통과하게 됨으로써 열가소성 수지층으로 피복되며, 상기 수지층은 즉각적으로 냉각되고 고형화된다. 
     피복된 케이블은 가열매체로서 액체를 사용하는 경화 탱크 내로 안내되어 외장 가닥들내의 열경화성 수지를 경화시키게 된다. 그후 피복된 케이블은 회전 권취장치를 경유하여 드럼상으로 권사된다.
Patent KR-950012650-B1 (KR)
Inventor: TSUJIMOTO KAZUSHI
IPC: G06Q10/00
Filed: 1991-07-09
Granted: 1995-10-19
Abstract: 내용 없음.
Patent KR-940005962-B1 (KR)
Title: Automatic frequency control circuit of radar receiving device
Inventor: KIM HYONG-JU
IPC: G01S13/06
Filed: 1991-07-26
Granted: 1994-06-25
Abstract: The circuit and method are for receiving the signal with a constant frequency regardless of the transmission frequency variation. The magnetron frequency is distributed centering around the center frequency within certain frequency region. The output of a frequency discriminator output is determined according to the above characteristic. A microprocessor (11) receiving the above voltage programs the oscillation control data to control an oscillator (32) of a front end (17). A tuning amplifier (22) amplifies the oscillation controlled voltage to have the linearity.
Patent KR-950003337-B1 (KR)
Inventor: TARUYA MASAAKI
IPC: H01L21/48
Filed: 1991-08-07
Granted: 1995-04-10
Abstract: 요약없음.
Patent KR-940002999-B1 (KR)
Title: Ic socket
Inventor: OH SE-HYOK
IPC: H01R33/76
Filed: 1991-09-03
Granted: 1994-04-09
Abstract: A semiconductor package is guided into a pressing plate which is pivotal on a hinge pin within the socket. Guide holes are formed on the bottom of the pressing plate to guide leads of the package. The leads of the semiconductor package are capable of being protected during test by guiding the leads along the guiding holes on the pressing plate.
Patent KR-960006464-B1 (KR)
Title: Method and circuit for controlling oscillation current in an oscillator
Inventor: KEHLER WALTER H JR
IPC: H03B5/12
Filed: 1990-05-17
Granted: 1996-05-16
Abstract: An automatic voltage-controlled oscillator (VCO) current control circuit, that senses a voltage in the VCO representative of the current of the VCO, compares that voltage to a reference voltage, and applies the voltage resulting from that comparison back to the VCO at a point therein that changes its bias state in such a manner as to maintain the noise level in the VCO at a minimum and also maintains the power output of the oscillator substantially constant.
Patent KR-940005366-B1 (KR)
Inventor: SAWANOBURI TATSUNARI
IPC: D05B69/18
Filed: 1992-01-11
Granted: 1994-06-17
Abstract: 내용 없음.
Patent KR-940005426-B1 (KR)
Title: Image recognition parts auto an array method and equipment
Inventor: BANG JIN-SOK
IPC: H05K13/02
Filed: 1992-03-12
Granted: 1994-06-18
Abstract: The method for automatically arranging parts includes the steps of detecting a predetermined characteristic pattern representing parts-arrangement-state-characteristic by using an image recognition; learning the pattern after classifying the detected characteristic pattern as a class responsive to an arrangement state; detecting a predetermined characteristic pattern with respect to predetermined parts equal to the learned parts; recognizing the present arrangement state of predetermined parts as the most similar learned characteristic pattern after comparing the detected characteristic pattern with the learned characteristic pattern; and arranging the predetermined parts according to the recognized result. Since the method has a high applicability about various parts and automatically performs an accurate arrangement of the parts, an automatic assembling line can be achieved, thereby increasing both a working ratio and a productivity.
Patent KR-950007004-B1 (KR)
Title: Accessory installing structure and method for a railcar
Inventor: CHOE JUNG-KWON
IPC: B61D37/00
Filed: 1992-03-27
Granted: 1995-06-26
Abstract: An assembly kit for inner facilities of a railway train includes rubber gaskets (5), push-fitting bolts, attachable fastening members (4), fastening screws (13), screw pad pieces (15) with adhesive layers, and the inner pannels formed in molded parts of a side (2a), an end (2b) and a ceiling (2c), which the pannels are produced by a mass-production system with molds. Each panel has flanges and lots of slot holes (3) which are formed on the flanges and matched with the fitting holes (7) on the frame of the train. The fitting method proceeds in turn with fitting and fastening one end of the panel to the train frame with the push-fitting bolts, fastening the other end of the panel to the one end of the other panel with the attachable fastening members, and attaching the inner facilities to the assembled panel with the fastening screws and pad pieces. The ceiling pannels are fastened by the fastening screws with pad pieces.
Patent KR-950011550-B1 (KR)
Title: Auto focus and adjust device and method in camera
Inventor: PARK SANG-UN
IPC: G03B13/36
Filed: 1992-04-21
Granted: 1995-10-06
Abstract: The method protects an abnormal exposure phenomena which have fuzzy inference effects in a center screen of window, exactly focuses a picture of camera, and adjustly exposes a camera image. The device includes an iris controller(3) which controls an iris(2) through lens(1), a CCD(4) which outputs an optic-converted exposured signal, a low pass filter(6), a monitor division digital integrator(7) which integrates an one field converted signal, a color signal devider(8) which converts an output of CCD(4) into the brightness and color signals, the R,G,B matrix(9) which outputs the R,G,B colors, an auto white balance processor(10), a switching unit(17), an analog/digital converter(12) which outputs a R,G,B signals into a digital signal, a micro-computer(13) which controls a camera function, an auto white balance controller(14), and a video signal processor(15).
Patent KR-960008526-B1 (KR)
Title: Manufacturing method of capacitor
Inventor: CHON YOUNG-KWON
IPC: H01L27/108
Filed: 1992-04-22
Granted: 1996-06-26
Abstract: forming a first semiconductor layer (24), a first interface layer (25), a second semiconductor layer (26), a second interface layer (27), a third semiconductor layer (28) and a third interface layer (29) in sequence after forming a contact hole by etching the first, the second, and the third insulating layer (21, 22, 23) properly; forming a forth interface layer (31) after etching the first semiconductor layer (24) to the third interface layer (29) selectively and forming a forth semiconductor layer (30), and etching the forth semiconductor layer (30) by using the third interface layer (29) as mask in order to reveal the third interface layer (29), and removing the third and the forth interface layer (29, 31); etching the second, the third, the forth semiconductor layer and the second interface layer selectively using the side wall of the fifth interface layer (32) as mask after forming the side wall of the fifth interface layer (32) by deposition and etchback of the fifth interface layer; forming a storage electrode by removing the first, the second and the fifth interface layer, and forming a plate electrode over the whole wafer after depositing a dielectric over the whole face of the storage electrode.
Patent KR-100235979-B1 (KR)
Inventor: SEO KWANG-HA
IPC: H01L21/283
Filed: 1992-06-12
Granted: 1999-12-15
Abstract: 본 발명은 서브 미크론 급의 고집적 소자를 실현 할 수 있는 반도체 소자의 제조방법에 관한 것으로, 종래에는 텅스텐의 배선이 단선 되고, 요철 발생이 많았으나, 본 발명에서는 전 표면에 알루미늄 합금(6)을 플로우시켜 에치백 하므로써 상기 결점을 개선시킬 수 있는 것이다.
Patent KR-100231953-B1 (KR)
Inventor: GERAD PAUL DEN BRABER
IPC: H03L7/095
Filed: 1992-07-13
Granted: 1999-12-01
Abstract: 본 발명은 위상 동기루프를 포함하는 장치에 관한 것으로, 상기 장치는 신호통로가 위상검출기, 루프필터 및 제어발진기를 포함하는 위상동기루프와, 상기 제어발진기에 인가되는 국부보조 파일럿을 발생하는 파일럿 검출기와, 입력이 상기 루프의 신호 통로에 연결되고 출력이 필터부를 통해 레벨 검출기에 연결된 파일럿 검출기를 구비한다. 이러한 경우에 정확하고 명백한 동기표시를 가능하도록 하기 위해서는 국부보조파일럿의 주파수를 루프의 통과대역내에 위치시키고 파일럿 검출기장치는 제1 및 제2입력을 가지는 동기검출기를 포함하되, 이 제1입력은 위상 검출기와 제어발진기사이 루프의 통로에 연결되고 제2입력은 파일럿 발생기의 출력에 연결되어 있으며, 상기 동기검출기의 출력은 저역필터에 연결되어 있다.
Patent KR-950014809-B1 (KR)
Inventor: SHINBARA YOSHIMI
IPC: B23Q15/00
Filed: 1992-08-31
Granted: 1995-12-15
Abstract: 내용 없음.
Patent KR-100233798-B1 (KR)
Inventor: F HODLER
IPC: B22D17/20
Filed: 1992-10-07
Granted: 1999-12-01
Abstract: 본 발명의 압력 다이캐스팅 블록은 분할 평면을 따라 정합되고 내부 공동을 형성하는 2개의 블록 반부와, 각각의 블록 반부에 배열된 2개의 분리가능한 부분으로 형성되며 공동과 연통하고 분할 평면을 따라 연장되는 통기 포트를 그 사이에 형성하도록 분할 평면을 따라 정합되는 통기 밸브를 포함하며, 상기 부분들 사이에 작용하는 힘이 블록 반부들 사이에 작용하는 힘에 종속하도록 블록이 조립될 때 통기 밸브의 부분들을 서로 탄성적으로 편위시키는 수단을 구비한다.
Patent KR-950003488-B1 (KR)
Title: Multi-function picture input device
Inventor: LEE IN-HONG
IPC: H04N1/387
Filed: 1992-10-13
Granted: 1995-04-13
Abstract: The the image input unit comprises; an image translating means for generating digital image data corresponding to each picture element and having a predetermined gradation against the images of documents containing both characters and pictures; a binarization means for processing the image data into simple binary coding; a control means for producing mode control signals corresponding to the scanning mode differently selected according to the documents and generating more than one region value designated on the documents; a count means for counting the number of picture elements, sub-seans and lines according to main seans so as to divide each designated region as many as the region values; and a mixed mode translating means for selecting and producing one of the binary data of the count means, the simple binary data and the dither binary data of the binarization means.
Patent KR-950001531-B1 (KR)
Title: Telephone keypad
Inventor: KWAK JI-KUN
IPC: H04M1/26
Filed: 1992-11-24
Granted: 1995-02-25
Abstract: The key top device operates easily in a body without respect to key position of a key switch. The device comprises a guide hale (208) for preventing inclination of key, in case of key operation and key assembling, through connecter (207) sticked by a catching step of an housing (105), and holes (211,212) which have several inserting sections to connect a nob (101) irrespective of pitch of a line switch (101).
Patent KR-960008529-B1 (KR)
Title: Manufacturing method of dram
Inventor: YU EUI-KYU
IPC: H01L27/108
Filed: 1992-12-30
Granted: 1996-06-26
Abstract: forming a pattern by etching a polysilicon (26) used for a gate electrode and word line using mask after forming a field oxide layer (2) on the semiconductor substrate (1) and a trench (3) in the region without the field oxide, and depositing a gate oxide layer (4), a polysilicon (26) in sequence and the injection of impurity; high temperature planarization after forming a gate electrode (6), word line (7) and a MOSFET active region (9, 9') of LDD structure, and depositing a first oxide (10) and a first BPSG (11) in sequence; forming a first spacer polysilicon (13) by depositing a polysilicon and etching the polysilicon anisotropically after depositing a first mask polysilicon (12) and etching the first mask polysilicon (12) and the first BPSG (11) selectively; revealing the active region (9'), and depositing a polysilicon (17) used for a first charge preserving electrode and connecting the polysilicon (17) to the MOSFET active region (9'), after forming a contact hole, connecting the polysilicon (14) to the active region (9), patterning bit line and planarization by etching the whole front after depositing a second oxide (15) and a second BPSG (16); forming a second spacer polysilicon (21') by etching the polysilicon (21) anisotropically after etching the second oxide (20), the second mask polysilicon (19) and the upper side of the first oxide layer (18) and depositing the polysilicon (21); the sixth step of forming a contact hole, depositing a polysilicon (22) which the impurity is injected in, connecting the polysilicon (22) to the polysilicon (17) used for the first charge preserving electrode, and etching the polysilicon (22) and the first oxide layer (18) in the presence of photoresist; forming a plate electrode (25) by depositing a polysilicon which the impurity is injected in over a dielectric (24) after patterning a second charge preserving electrode, removing the photoresist and forming a dielectric (24).
Patent KR-960000988-B1 (KR)
Inventor: GAWASKI MASACHI
IPC: B23Q1/42
Filed: 1991-05-30
Granted: 1996-01-15
Abstract: 내용 없음.
Patent KR-100251394-B1 (KR)
Title: Pharmaceutical uses of bilobalide and derivatives thereof and pharmaceutical composition adapted for such use
Inventor: BOMBARDELLI EZIO
IPC: A61P1/02
Filed: 1993-02-13
Granted: 2000-05-01
Abstract: The invention provides a method of treating an infection in an individual, by administering an effective dose of bilobalide or of a pharmacologically acceptable derivative thereof. Activityagainst infection with Pneumocystis carinii has major utility in treating AIDS-associated infections. Bilobalide may be administered systemically or topically in accordance with the invention. For systemic use, oral and parenteral routes of administration may be used.
Patent KR-0152450-B1 (KR)
Inventor: PAIK WOO-H
IPC: H04N7/00
Filed: 1993-03-24
Granted: 1998-11-02
Abstract: 본 발명은, 16-QAM, 32-QAM 및 64-QAM(30)과 같은 복수의 QAM 모드 중 어느 하나로 데이터를 통신할 수 있는 QAM(Quadrature Amplitude Modulation) 통신 시스템을 제공한다.  수신기(70)는, 동기 조건이 검출될 때까지 다른 QAM 모드를 이용해서 수신 데이터를 디코드하도록 시도함으로써, 시행 착오 기초하에 송신되는 특정의 QAM 모드를 검출한다.  동기 조건은 복수의 다른 동기 테스트가 충족되는 것을 요구할 수 있다.  특정의 실시예에서는, 제1동기 테스트는 트렐리스 디코더(90)의 재정규화율이 문턱치 이하일 때 충족되고, 제2동기 테스트는 수신 데이터 중에서 제1동기 워드를 검출한 때에 충족되며, 제3 및 최종 동기 테스트는 수신 데이터 중에서 제2동기 워드를 검출한 때에 충족된다.  수신기의 제조 원가를 절감하기 위해서, 대부분의 QAM 모드 종속 구성 요소(76, 80, 84, 90, 98, 102)는 PROM에 격납된 룩업 테이블(look-up table)을 이용해서 구현하고 있다.