baber/WOPTO huggingface dataset:
Patent KR-900006686-B1 (KR)
Title: Method for addition of low-melting point metal to molten seel
Inventor: TAKASIMA KIYOSHI
IPC: C22C33/04
Filed: 1986-02-17
Granted: 1990-09-17
Abstract: A method for adding a low-melting point metal in liquid steel within a ladle, wherein at least one member selected from the group consisting of a low-melting point metal and an oxide of the metal is mixed with at least one member selected from the group consisting of a quick lime and a carbonaceous material in the amounts that satisfy the relations expressed by the formulas x+y+z+ m=1; 5.5x+3.3y+z+m<=5.0; 0<=x<1; 0<=y<1; 0<=z<0.3; 0<=m<0.25; 0.1<=z+m<= 0.3, and the mixture is blown into the liquid steel through an injection lance together with a gas. In the formulas, x,y,z and m are the wt. proportions of the low-melting point metal, the oxide of the metal, the quick lime and the carbonaceous material.
Patent KR-930001081-B1 (KR)
Inventor: CAMPBELL PARTRICIA
IPC: A61M37/00
Filed: 1986-07-14
Granted: 1993-02-15
Abstract: 내용 없음.
Patent KR-900001000-B1 (KR)
Title: Information signal out-put selecting method of teletext
Inventor: KIM KYUNG-SUP
IPC: H04N7/08
Filed: 1986-09-15
Granted: 1990-02-23
Abstract: The circuit for selecting the desired page easily from the transmitted information in the teletext system includes a demodulator (1), a chroma circuit (2) for providing R,G,B colour signals, an information signal separator (3), an acquisition circuit (4) for comparing the FC signal of row 0 in the output of the comparator and the page information selected by an user, a page memory (7) for storing the information signal of row 0- row 31 provided from the output of the acqusition circuit, a charactor generator (8) for providing charactor signal according to the output of the memory, and a switching circuit (9) for switching the outputs of the chroma circuit or character generator selectively.
Patent KR-900001189-B1 (KR)
Title: Substituted piperazure-1,4-naphthalene-diones and the preparation process thereof
Inventor: MEDWID JEFFERY B
IPC: C07D295/205
Filed: 1986-12-18
Granted: 1990-02-27
Abstract: Substd. piperazine -1, 4-naphkhalenediones of formula (I) and their acid addn. salts may be prepd. by reacting a 2.3- dichloronaphthoquinone of formula (II) with an amine of formula (III) in a solvent e.g. ethanol.  In the formulas, R1 is halo, OH, C1-4 alkly, C1-3 alkoxy, -nhcoch3 or -N(COCH3)2; R2 is H or C1-4 alkyl; R3 and R4 are each C1-3 alkyl; R5 is H, formyl, acetyl, -COOC1-4  alkyl, phenyl, benzyl or 4-alkyl C1-6 benzoyl.  (I) are used as antiallergics and antiasthmatics.
Patent KR-950005132-B1 (KR)
Title: Method of producing 2-keto-d-glucaric acid
Inventor: SHIRAFUJI HIDEO
IPC: C12P7/58
Filed: 1986-12-26
Granted: 1995-05-18
Abstract: 2-Keto-D-glucaric acid is in high yield produced by contacting raw material saccharides (e.g. D-glucose) with a bacterium belonging to the genus Pseudogluconobacter or processed matters thereof.
Patent KR-900001203-B1 (KR)
Title: Encainide preparing method and the intermediate thereof
Inventor: DILLON JOHN L
IPC: A61K31/451
Filed: 1987-02-24
Granted: 1990-02-28
Abstract: A preph. of 4-methoxy-2' (2-(1-methyl-2-piperidyl)benzanilide (encainide) (I) in hydrochloride form comprises reacting xpicoline and dimethyl sulphate to give picolinium methyl sulphate (V), which is then combined with 0-nitrobenzaldehyde to give 1-C2-nitrophenyl)- 2-(2-1-methyl) pyridinium-methyl-sulphate) ethanol (IV).  This prod. is heated in mixt. of acetic acid, acetic anhydride and potassium acetate to give 2-(2-nitro-styrenyl)-2-1methyl) pyridinium methyl sulphate (III) which is hydrogenated with a Pt catalyst to give w-(2- aminophenethyl)-1-methyl piperidine (II).  This is reacted with anisoyl chloride in a solvent selected from acetone, acetonitrile or a C2-5 alkanol, to give the hydrochloride of (I).
Patent KR-950009591-B1 (KR)
Title: Device checking the location of tape
Inventor: YAMANAKA MASHAKI
IPC: G11B27/11
Filed: 1987-04-07
Granted: 1995-08-24
Abstract: In recording and/or reproducing signals on a tape (13) running between supply (14) and take-up reels (15) on which the tape (13) is wound, the tape position is detected by initially determining the radii of the outer turns of the tape (13) on the supply (14) and take-up reels (15) with the tape in a reference position, generating signal pulses in response to rotation of the reels (14, 15) for movement of the tape (13) from the reference position, counting the numbers of such signal pulses generated during movement of the tape (13) from the reference position to an arbitrary tape position, and calculating at least one of the radii of the outer turns of the tape (13) on the supply (14) and take-up reels (15) for the arbitrary tape position on the basis of the corresponding radii for the reference tape position and the numbers of the signal pulses counted during movement of the tape (13) from the reference position to the arbitrary tape position. The length along the tape (13) from the reference tape position to the arbitrary tape position may also be calculated on the basis of the radii on the supply (14) and take-up reels (15), respectively, for the reference tape position, and the numbers of signal pulses counted in correspondence to the revolutions of the supply (14) and take-up reels (15), respectively, during movement of the tape (13) from the reference position to the arbitrary tape position.
Patent KR-920010115-B1 (KR)
Inventor: HASEGAWA TSURUSO
IPC: B60N2/90
Filed: 1987-04-18
Granted: 1992-11-16
Abstract: 내용 없음.
Patent KR-900007366-B1 (KR)
Title: Ball screw having an axially extending ball deflector
Inventor: TERAMACHI HIROSHI
IPC: F16H25/24
Filed: 1987-05-18
Granted: 1990-10-08
Abstract: The screw spindle (1) and sleeve nut (2) assembly is provided with external (1a) and internal (2a) semi-circular track grooves for the location of circulating coupling balls (5). A sleeve insert (3) in the form of a segment has internal deflector track groove profiles (3a) which produce endless track grooves for the circulating balls. Two internal end rings (4) which are secured to the nut sleeve (2) are used to retain the insert (3) and seal rings at each nut end. The two rings also provide radial location for the screw spindle (1).
Patent KR-950008592-B1 (KR)
Title: Reservoir feed method of making ceramic composite structure and structures made thereby
Inventor: NEWKIRK MARC S
IPC: C04B35/65
Filed: 1987-09-16
Granted: 1995-08-03
Abstract: A method for producing a self-supporting ceramic composite structure comprising a ceramic matrix embedding a filler (38) includes oxidizing a parent metal to form a polycrystalline material comprising the oxidation reaction product of the parent metal with an oxidant and, optionally, one or more metallic constituents, and the filler (38) embedded by the matrix. The method includes heating the parent metal to provide a first source (36) of molten parent metal and a reservoir (34) of molten parent metal and contacting the first source (36) of molten parent metal with a permeable bedding of filler (38). The first source (36) of molten parent metal is reacted with the oxidant to form the oxidation reaction product and is replenished from the reservoir (34) as the reacting continues for a time sufficient to grow the oxidation reaction product to a desired boundary and thereby embed at least a portion of the bedding of filler (38) within the oxidation reaction product to form the ceramic composite structure. The bedding of filler (38) may have any suitable shape, including that of a hollow body, the interior of which is contacted by the first source (36) of molten parent metal to grow the oxidation reaction product through the shaped, hollow body of filler.
Patent KR-910000865-B1 (KR)
Title: Composition of ink
Inventor: CHO OK-SON
IPC: C09D11/50
Filed: 1987-10-26
Granted: 1991-02-11
Abstract: The  ink  composition  is  composed  of  0.2-1.5g  phthalein indicator, 1-5cc dimethylformamide (DMF), 20-40cc alcohol,  0.5-1g sodium hydroxide, 2-5cc propyl gallate, and 40-70cc  water.  Among the composition, sodium hydroxide, propyl gallateand and water are used to regenerate the erased letters soon after writing, and  the indicator is used to show the color change during the perishing of letters. The ink composion can be used as printing ink composition and in various writing pens.
Patent KR-900006940-B1 (KR)
Title: Super twisted nematic liquid crystal display elements
Inventor: KIM YOUNG-SUK
IPC: G02F1/133
Filed: 1987-11-30
Granted: 1990-09-25
Abstract: The super twisted nematic liquid crystal display element comprises transparent glass substrates (2,2'); conduction films (3,3') formed on the opposed surface of the substrates (2,2'); orientation films (4,4') formed on the conduction films (3,3'), a spacer (6) maintaining cell gap between the substrates (2) and (2'); a spacing portion (7); and polarizing plates (1,1") attached to the outer surface of the substrates (1,1'). The method for maintaining cell gap includes preparing two spacers (6,6') having different diameters from each other.
Patent KR-900004917-B1 (KR)
Title: High polymerized fiber and that's manufacturing process
Inventor: KIM SEONG-JUNG
IPC: D01F6/62
Filed: 1987-12-08
Granted: 1990-07-09
Abstract: A high polymerized, crystalline polyester fiber is mfd. by (a) melt- spinning a polyester polymer having 65-75 % of crystallinity, 260-275 deg. C of melt temp., at least 16 cal/g of heat of fusion, and 30000- 40000 poise of melt viscosity with at least 200 m/min of spinning velocity, (b) cooling and hardening it, (c) and drawing and heat- treating it at 200 deg. C or more. The polyester fiber having a good dimensional stability has a fine structure of at least 56% of crystallinity and 0.65-0.8 % of the difference between ave. birefringence ratio and crystalline orientation factor.
Patent KR-920001781-B1 (KR)
Inventor: WETEGROVE REBERT L
IPC: C08F6/06
Filed: 1988-02-12
Granted: 1992-03-02
Abstract: 내용 없음.
Patent KR-910002755-B1 (KR)
Inventor: NAKAO DAKESHI
IPC: G11B5/02
Filed: 1988-02-15
Granted: 1991-05-04
Abstract: 내용 없음.
Patent KR-900008671-B1 (KR)
Inventor: PARK KI-NAM
IPC: A24D3/14
Filed: 1988-02-17
Granted: 1990-11-26
Abstract: 내용 없음.
Patent KR-960012166-B1 (KR)
Inventor: TSUCHITANI SHIGEKI
IPC: G02F1/355
Filed: 1988-02-26
Granted: 1996-09-16
Abstract: 내용없음
Patent KR-900003232-B1 (KR)
Title: Magnetic card
Inventor: KIHARA NOBUTOSHI
IPC: G06K9/00
Filed: 1988-05-04
Granted: 1990-05-11
Abstract: The device is set into a desired mode of operation by manual scanning, with an optical receiver, one or more code groups printed on a selection card. Respective selection cards have code groups for selecting, for example, mode, channel, day of week, recording start time, tape select, and recording end time. Code signals provided from the scanning instrument are processed in a data processing circuit, which can be provided as a microprocessor and included in the VTR to provide control signals to the VTR in response to information contained in the scanned code groups. Alternatively, a combination of an FM receiver and high fidelity audio recorder can be set into an auto record mode or other complex operating mode. This is done by scanning of selection cards with a scanning instrument associated with the combination.
Patent KR-910008479-B1 (KR)
Inventor: KOVALCHICK JOSEPH S
IPC: G01J3/51
Filed: 1988-05-19
Granted: 1991-10-18
Abstract: 내용 없음.
Patent KR-0127482-B1 (KR)
Inventor: WILLEM GERARD OPHEIJ
IPC: G11B7/12
Filed: 1988-06-11
Granted: 1997-12-29
Abstract: 내용 없음.
Patent KR-950004723-B1 (KR)
Inventor: KANAYACHI KIYOSHI
IPC: G07F19/00
Filed: 1988-09-01
Granted: 1995-05-06
Abstract: 내용 없음.
Patent KR-910007433-B1 (KR)
Inventor: MINAGAWA HIDENOBU
IPC: G11C29/50
Filed: 1988-09-09
Granted: 1991-09-26
Abstract: 내용 없음.
Patent KR-970007341-B1 (KR)
Inventor: BOTHE LOTHAR
IPC: B29C59/16
Filed: 1988-09-22
Granted: 1997-05-07
Abstract: 내용없음.
Patent KR-920003351-B1 (KR)
Title: Liquid crystal tv panel
Inventor: SHIM GAB-SOO
IPC: G02F1/133
Filed: 1988-11-15
Granted: 1992-04-30
Abstract: A liquid crystal display  panel  for  TV  set,  which  drives liquid crystal charged between two face-to-face glass  substrates, front side and back side, coated with electrodes, is  produced  by successively laminating (A) a first common electrode (2) formed by coating indium tin oxide on the front side glass  substrate  (1b), (B) a black mask part (4), (C) a photosensitive resin  part  (18), (D) a color filter (3) formed on (2), (E) a gate insulating  layer (6) formed on (3), (F) a second common  electrode  (7)  formed  on (6), (g) another gate insulating layer (8) formed on (7), and  (H) oriented film (56) forced on  (8).  The  produced  liquid  crystal panel improves the image quality of TV screen.
Patent KR-910003581-B1 (KR)
Title: Sealing method of connecting park for insulated wire
Inventor: CHO HYONG-GI
IPC: H02G15/08
Filed: 1988-12-26
Granted: 1991-06-05
Abstract: The method comprises (1) rolling up heat-resistant tape  over the surface of cable connection part to make an air  passage,  (2) combining moulds around it, (3) heating slowly first up to 100-120 deg.C and second up to 150 deg.C for 2-4  hrs,  while  discharging excess insulator caused by thermal expansion  into  resin  feeding inlet and outlet, and  (4)  cooling  the  connection  part,  while pressurizing  nitrogen  gas  into  the  outlet  to  suppress  foam generation.
Patent KR-920003935-B1 (KR)
Title: Input mode selecting system of v.t.r.
Inventor: CHO SEONG-WON
IPC: G11B20/00
Filed: 1988-12-28
Granted: 1992-05-18
Abstract: The input mode selecting circuit for PAL type VTR selects the input mode for TV, AUX, and AV  using  channel  up/down  key.  The method for selecting the input mode comprises: (A) storing channel data for switching to the AUX or the  AV  mode  on  a  certain  TV channel memory according to input up/down key;  (B)  checking  the channel data stored on the memory to discriminate the input  mode; (C) sending mode selection control signals (CT1,CT2) to  an  input mode selecting IC (4); and (D) discriminating that the input  mode is the TV mode  and  sending  mode  control  signal  to  the  mode selecting IC (4) when memory different from the TV channel  memory is selected.
Patent KR-920009851-B1 (KR)
Inventor: GRABBE DIMITRY G
IPC: H01R12/83
Filed: 1987-10-07
Granted: 1992-10-31
Abstract: 내용 없음.
Patent KR-960010927-B1 (KR)
Inventor: CORNETT JOHNNY A
IPC: G06F3/0487
Filed: 1989-01-11
Granted: 1996-08-13
Abstract: 내용 없음.
Patent KR-960012684-B1 (KR)
Inventor: UESIMA DAKAAKI
IPC: B66B1/20
Filed: 1989-03-08
Granted: 1996-09-24
Abstract: 요약없음
Patent KR-920006530-B1 (KR)
Inventor: MORISHITA MITSUHARU
IPC: B62D5/04
Filed: 1989-03-13
Granted: 1992-08-08
Abstract: 내용 없음.
Patent KR-970010599-B1 (KR)
Inventor: MCINTYRE DANIEL K
IPC: C08J7/043
Filed: 1989-04-26
Granted: 1997-06-28
Abstract: 내용없음
Patent KR-970011700-B1 (KR)
Inventor: KELLNER CARL STEPHEN
IPC: C07C17/10
Filed: 1989-05-19
Granted: 1997-07-14
Abstract: 내용없음
Patent KR-0152971-B1 (KR)
Inventor: LEE KYUNG-ILL
IPC: G01B21/16
Filed: 1989-06-21
Granted: 1998-10-01
Abstract: 내용 없음
Patent KR-940000793-B1 (KR)
Inventor: SWISHER ROBERT G
IPC: C03C25/26
Filed: 1989-07-04
Granted: 1994-01-31
Abstract: 내용 없음.
Patent KR-920005802-B1 (KR)
Inventor: TOMIZUKA KAZUO
IPC: H01L23/58
Filed: 1989-07-12
Granted: 1992-07-18
Abstract: 내용 없음.
Patent KR-970010717-B1 (KR)
Inventor: ANTHONY ANTON
IPC: D01F6/60
Filed: 1989-12-12
Granted: 1997-06-30
Abstract: 내용없음
Patent KR-940010959-B1 (KR)
Inventor: ONO FUMITAKA
IPC: H04N1/41
Filed: 1990-01-04
Granted: 1994-11-19
Abstract: 내용 없음.
Patent KR-0163584-B1 (KR)
Inventor: SEKI TAKAHIDE
IPC: H01H33/90
Filed: 1990-02-07
Granted: 1998-12-15
Abstract: 부압실에 있어서의 동작초기부터의 급격한 반력의 발생을 억제하여 조작장치의 소형화를 가능하게 하는 스위치가 제공된다. 본 발명은 상기의 목적을 달성하기 위하여 가동접촉자의 분리동작과 관련하여 작동하는 부압실을 가진 스위치에 있어서 부압실에 가동접촉자의 분리 초기구간중에 부압실내의 부압을 억제하기 위한 유체를 공급하는 수단에 부압실이 연결된다. 이에 따라, 본 발명에 의한 스위치는 가동접촉자의 분리 초기구간동안 부압실의 부압 발생을 억제할 수 있다. 그러므로 분리동작의 초기에 있어서 조작장치에 부압발생에 의한 반력이 작용하지 않고 작은 조작력에 의하여 조작장치를 조작할 수 있다. 분리동작 초기 이후에는 분리동작초기에 있어서 얻어지는 조작장치의 관성력에 의하여 부압발생에 따르는 반력에 대항하여 조작장치를 조작할 수 있다. 따라서 조작장치를 소형으로 할 수 있음과 동시에 압축공기를 이용하는 조작장치도 사용하는 것이 가능하게 된다.
Patent KR-930011709-B1 (KR)
Inventor: WU TSUN-ZONG
IPC: A45B25/14
Filed: 1990-07-16
Granted: 1993-12-18
Abstract: 내용 없음.
Patent KR-940009155-B1 (KR)
Title: Lcd light valve
Inventor: HONG SONG-HO
IPC: G02F1/1335
Filed: 1990-07-27
Granted: 1994-10-01
Abstract: The valve comprises a photo conductive layer (4) the impedance of which is varied by input light, a birefringence layer which has an LCD for refracting input light, a shading layer (5) which consists of P-type amorphous silicon coated with boron and is located between the birefringence layer and the photo conductive layer, and electrodes which provide a birefringence part with a driving voltage.
Patent KR-100195852-B1 (KR)
Inventor: YANO HAZIME
IPC: G06F3/0354
Filed: 1990-08-22
Granted: 1999-06-15
Abstract: 내용 없음.
Patent KR-0175067-B1 (KR)
Title: Extracts of gingko biloba leaves and their method of preparation
Inventor: O'REILLY JOSEPH
IPC: A61K31/70
Filed: 1990-12-04
Granted: 1999-02-01
Abstract: The invention relates to highly concentrated active component concentrates and new active component combinations from Ginkgo biloba leaves as well as their method of preparation and the pharmaceuticals containing these active component concentrates or active component combinations.
Patent KR-950002670-B1 (KR)
Title: Noise reduction apparatus
Inventor: PARK U
IPC: H04N7/015
Filed: 1990-12-28
Granted: 1995-03-24
Abstract: The noise suppression circuit for video disk player enhancing the background image quality of the still video signal and preventing the ghost image of moving image video signal comprises a horizontal compensating means(10) compensating the image video signal in the quasi-still status; a subtracter(20) subtracting the current frame video signal and the output of a horizontal compensating means(10); a frame modifier(40) receiving the subtracted signal between the output of the horizontal compensating means(10) and a delay means(70); a adder(50) adding the output of the frame modifier(40) and the delay means(70); a memory means(30) keeping the noise suppression level data.
Patent KR-0173463-B1 (KR)
Title: Working cylinder
Inventor: SUNDHOLM GOERAN
IPC: F16J1/12
Filed: 1989-06-14
Granted: 1999-05-01
Abstract: The invention relates to a working cylinder comprising a cylinder unit with a front end part, a rear end part and a cylinder tube connecting these end parts, a piston movable in the cylinder tube and a piston rod secured to the piston and extending through the front end part. The purpose is to provide a novel, simple solution for securing the cylinder tube to the end parts. Each end part has a shoulder, the cylinder tube being connected to each end part by means of a compression ring which upon deformation of the end of the cylinder tube and by means of said end tightly clamps the end shoulder.
Patent KR-970006964-B1 (KR)
Inventor: TAKAHASHI TATSUMI
IPC: B29C48/58
Filed: 1989-09-26
Granted: 1997-05-01
Abstract: 내용없음
Patent KR-950011392-B1 (KR)
Inventor: KISHI MITSUHIRO
IPC: B66F11/04
Filed: 1991-02-20
Granted: 1995-10-02
Abstract: 내용 없음.
Patent KR-100230155-B1 (KR)
Title: Horizontal deflection system
Inventor: TODD CHRISTOPHER J
IPC: H04N3/27
Filed: 1991-03-25
Granted: 1999-11-15
Abstract: Adjustment and maintenance of a phase relationship between a video signal (on 11) and a scan synchronizing signal (on 67) to assure proper horizontal centering is provided in a horizontal deflection system (40). A first phase locked loop generates a first timing signal (on 17) at a first frequency, synchronously with a horizontal synchronizing component in a video signal. A presettable counting circuit (in 56) operates synchronously with the first timing signal for dividing a clock signal to generate a second timing signal (on 61) at a second frequency. A second phase locked loop (62) generates a scan synchronizing signal (on 67) from the second timing signal. A microprocessor (74) may supply different numbers to a register (in 56), the output of the register being coupled to the presettable counting circuit. Different numbers (from 74) change the relative phase between the first and second timing signals by incremental steps. The microprocessor (74) monitors a video source selection switch to gate one of alternative video sources as a video and synchronizing signal output and adjusts the relative phase between the horizontal synchronizing component of the selected video source and a synchronous timing signal by a factor appropriate for the selected video source. A manually operable circuit (72) may be coupled in a feedback path of the second phase locked loop (62) for adjusting the relative phase between the second timing signal (on 61) and the scan synchronizing signal (on 67), over a range corresponding to an incremental step. <IMAGE>
Patent KR-0185662-B1 (KR)
Inventor: SEZI RECAI
IPC: H01L21/3065
Filed: 1991-04-25
Granted: 1999-04-01
Abstract: 무수물 그룹과 블로킹 이미드 또는 페놀성 히드록시 그룹을 함유한 폴리머와 광활성 성분으로 이루어진 포토레지스트층을, 노광시 강산을 형성하는 화합물의 형태로 기판위에 부착시킬 때, 종래의 장치를 사용하여 DUV-범위의 고감도에서 수직의 테두리를 가지는, 용성이 큰 레지스트를 얻고, 포토레지스트층을 상에 적합하게 노광하며, 다중 작용기성 아미노 또는 히드록시실옥산의 수성액 또는 물-알콜의 용액으로 노광 포토레지스트를 처리한후, 상기 처리된 포토레지스트를 산소플라즈마로 에칭한다.
Patent KR-0181330-B1 (KR)
Title: Use of a 1-(2-naphthylethyl)-4-(3-trifluoromethylphenyl)-1,2,3,6-tetrahydropyridine for the manufacture of a medicament for nervous disease
Inventor: FOURNIER JACQUELINE
IPC: A61P25/28
Filed: 1991-05-22
Granted: 1999-03-20
Abstract: The invention relates to a method of evaluation of substances which are active at neuronal level, which consists in producing neuronal lesions in experimental animals by injecting an effective amount of vincristine into their medium septum, and in then evaluating the activity of the aforementioned substances in morphological and/or biochemical tests.
Patent KR-0163436-B1 (KR)
Inventor: YAMAZAKI DAISUKE
IPC: H04S7/00
Filed: 1991-05-29
Granted: 1998-12-01
Abstract: 본원 발명의 스테레오의 압력 L, R 채널의 차신호의 소정 대역의 주파수성분의 이득을 임의로 변화시켜서, 각각을 입력 L, R 채널의 신호에 가산함으로써, 또한 차신호의 고주파수대역과 저주파수대역의 성분의 이득을 임의로 변화시키도록 함으로써, 간단하고 저렴한 구성으로 임장감(臨場感) 및 중량감이 있는 스테레오재생음을 얻을 수 있게 되는 음향부가회로를 제공하는 것이다.
Patent KR-940002675-B1 (KR)
Inventor: ABE NORIYOSHI
IPC: B23K3/047
Filed: 1991-05-30
Granted: 1994-03-30
Abstract: 내용 없음.
Patent KR-930012022-B1 (KR)
Title: Cluck generator for keyboard controller
Inventor: PARK HUI-DOK
IPC: H03K5/00
Filed: 1991-06-13
Granted: 1993-12-23
Abstract: The circuit comprises a system clock generating section  (1), resistors (R1,R2) connected to a power  supply  (Vcc),  the  first D- type flip-flop (FF1) to the resistors and the output terminal of the system clock generating section, the second  D-type  flip-flop (FF2) connected to the resistors and the output  terminal  of  the first D- type flipflop and an AND gate  (G1)  including  the  input terminals and the  output  terminal  connected  to  the  inverting output terminals of the flip-flops and the input terminal  of  the first flip-flop, respectively.
Patent KR-0154544-B1 (KR)
Inventor: MAEKAWA ITARU
IPC: H03F3/30
Filed: 1991-07-09
Granted: 1998-12-15
Abstract: 본원 발명은 바이어스전압발생회로 및 연산증폭기에 관한 것이며, 특히 반도체집적회로(IC)의 외부부착 저항기에 의해 복수의 바이어스전압을 동시에 설정할 수 있도록 한 바이어스전압발생회로 및 연산증폭기에 관한 것이다. 
     본원 발명의 바이어스전압발생회로는 다이오드접속된 제1도전형의 제1의 트랜지스터, 상기 제1도전형의 제2 및 제3의 트랜지스터로 이루어지는 커렌트미러회로와, 각각이 다이오드접속되는 동시에 각각의 입력전극이 상기 커렌트미러회로의 제2 및 제3의 트랜지스터의 출력전극에 접속된 상기 제1도전형과는 다른 제2도전형의 바이어스전압발생용의 제4 및 제5의 트랜지스터를 가지고, 상기 커렌트미러회로의 제1 내지 제3의 트랜지스터 및 상기 바이어스전압발생용의 제4 및 제5의 트랜지스터를 1칩 반도체기판상에 형성하는 동시에, 상기 커렌트미러회로의 제1의 트랜지스터의 입력전극에 접속되고, 소정의 바이어스전류를 공급하는 저항기를 상기 반도체기판의 외부에 설치하고, 상기 저항기의 저항치에 따라 제4 및 제5의 트랜지스터의 바이어스출력전압을 동시에 설정할 수 있다. 
     또한, 본원 발명의 연산증폭기는 각각이 정전류원용 트랜지스터를 가지는 복수채널의 연산증폭기를 상기 1칩 반도체기판상에 형성하는 동시에, 상기 제4 및 제5의 트랜지스터의 강하전압에 의해 상기 복수채널의 연산증폭기의 정전류용 트랜지스터를 각각 바이어스하여, 외부부착 저항기에 의해 복수채널의 연산증폭기의 동작전류를 동시에, 또한 정확하게 설정할 수 있다.