baber/WOPTO huggingface dataset:
Patent KR-930010478-B1 (KR)
Title: Reel torque apparatus vcr
Inventor: KANG KWANG-YOL
IPC: G11B15/44
Filed: 1990-10-29
Granted: 1993-10-25
Abstract: The device comprises a middle gear assembly having  a  single clutch mechanism  to  convert  the  drive  force  from  an  idler mechanism into a desired torque and transmit it. The single clutch mechanism includes a frictional plate fitted around a middle boss, a flange fitted around the boss beneath the  plate  so  as  to  be selectively in contact with the felt,  a  coil  spring  interposed between the middle gear and the  frictional  plate  and  a  middle pulley fitted around  the  flange  and  connected  with  a  drive mechanism by a belt and being upwardly and downwardly movable with respect to the flange by a lifting mechanism to convert the  drive force of drive mechanism into a torque which varies  depending  on the rotation direction of drive mechanism and transmit it.
Patent KR-930001384-B1 (KR)
Title: New microorganism klebsiella oxytoca no. 19-1
Inventor: CHOE JANG-YUN
IPC: C12R1/22
Filed: 1990-12-20
Granted: 1993-02-27
Abstract: Klebsiella oxytoca No, 19-1 (KCCM 10002) is a new strain.  It digests  starch  to  alpha-cyclodextrin   (I)   with   very   high selectivity. (I) is produced from  starch  by  treatment  with  an enzyme prepn., contg. cyclodextrin glucanotransferase (CGT), which is the culture medium used to grow K. oxytoca  No.  19-1.  (I)  is able to form inclusion cpds. with many organic (esp.  hydrophobic) cpds. and  is  useful  in  foods,  pharmaceuticals,  agricultural chemicals, etc. Typical uses  are  stabilisation,  protection  and improving water solubility of these cpds.; emulsification of  fats and oils; control of chemical reactions, etc..
Patent KR-940006049-B1 (KR)
Inventor: TAKAKI ICHIRO
IPC: B60H1/32
Filed: 1990-12-20
Granted: 1994-07-02
Abstract: 내용 없음.
Patent KR-940004064-B1 (KR)
Inventor: KATA YASUO
IPC: C07H1/00
Filed: 1990-12-26
Granted: 1994-05-11
Abstract: 내용 없음.
Patent KR-930010156-B1 (KR)
Title: Device for controlling tire pressure on car
Inventor: KIM JAE-YONG
IPC: B60C23/00
Filed: 1990-12-31
Granted: 1993-10-15
Abstract: The air pressure controller, a device that controls  the  air pressure of tire according to the driving condition of car and  to the condition of road  surface,  comprises  micro  processor  (11) controlling the suspension  and  the  height  of  car,  electronic control suspension (ECS) (10) with speed sensor (14) detecting the angular  velocity  of  steering  wheel,   micro   processor   (21) controlling the air pressure of tire according to the condition of road surface and to the suspension  control  signal  offered  from ECS, air pressure sensor (22) detecting the air pressure of  tire, air pressure  control  &  driving  part  (23),  and  air  pressure producing and storing part (24).
Patent KR-930011761-B1 (KR)
Inventor: MUGURUMA NOBUYOSHI
IPC: B05B7/04
Filed: 1988-09-30
Granted: 1993-12-20
Abstract: 내용 없음.
Patent KR-930009866-B1 (KR)
Inventor: MIYOSHI TOSHIHIRO
IPC: H04N5/04
Filed: 1989-10-24
Granted: 1993-10-12
Abstract: 내용 없음.
Patent KR-950013648-B1 (KR)
Inventor: BECHTEL WILLIAM THEODORE JR
IPC: E06B5/16
Filed: 1991-02-04
Granted: 1995-11-13
Abstract: 내용 없음.
Patent KR-940001937-B1 (KR)
Inventor: HASHIMOTO ATSUKO
IPC: F02P5/153
Filed: 1991-04-29
Granted: 1994-03-11
Abstract: 내용 없음.
Patent KR-910007637-B1 (KR)
Title: Process for making veberage using woorong tea
Inventor: OH SANG-YONG
IPC: A23L2/38
Filed: 1991-05-10
Granted: 1991-09-28
Abstract: A process for preparing beverage from woorong tea  comprises: (a) soaking the material (e.g., woorong tea (I),  ganoderna  (II), ginseng (III), jujube (IV),  etc)  for  30min,  and  washing;  (b) mixing the washed material  with  5-10  times  of  water  and  1st extracting at 60-100 deg.C for 2-3hrs to obtain the  water-soluble component (V); (c) mixing the extracted material with  5-10  times of 80% EtOH and 2nd extracting at 40-90 deg.C for 2-3hrs to obtain EtOH- soluble component (VI); (d) mixing the (V) with the (VI)  and concentrating to Brix 50 under vacuum at 50  deg.C  or  less;  (e) mixing 1.0-2.0% (I)-, 0.1-0.5% (II)-, 0.4-0.7% (III)- and 0.7-2.0% (IV)-extract, and adding 1.5-4.0% honey, 1.0-5.0% sugar,  8.0-13.0 HFCS, 0.02-0.20% citrate, etc to obtain the final product.
Patent KR-940008871-B1 (KR)
Inventor: TAKEGATO SHIGERU
IPC: G11B25/04
Filed: 1991-05-18
Granted: 1994-09-28
Abstract: 내용 없음.
Patent KR-960005128-B1 (KR)
Title: Reservation recording method using teletext
Inventor: KIM HYUNG-BAEK
IPC: G11B27/10
Filed: 1991-10-01
Granted: 1996-04-20
Abstract: judging whether an inputted signal is selected the reserved mode section or not; distinguishing multiple text broadcasting by a micom not in case of the reserved mode; storing at first in ROM of the micom a broadcasting sequence guide information inputted from a teletext receiving section which is transmitted during multiple text broadcasting; displaying the guide information of the broadcasting program with a cursor on a monitor; comparing at first whether a program number for reserved video recording is higher than a number placed current cursor; moving a first cursor onto one step; repeating the first cursor movements through the first comparing; comparing at second whether the program number for reserved video recording is lower than the number placed current cursor; moving a second cursor below one step; moving the cursor onto a program number for wanting an user; inputting an ENTER key; storing at second a signal converted constant code which is data of the reserved program stored in ROM of the micom; transmitting an electrical signal for storing; and transmitting an electrical signal for ending the program setting.
Patent KR-940011905-B1 (KR)
Inventor: HINO TOMOKAZU
IPC: A01N37/44
Filed: 1991-11-16
Granted: 1994-12-27
Abstract: 내용 없음.
Patent KR-930009107-B1 (KR)
Title: Snap ring tool
Inventor: PARK TAE-HUI
IPC: B25B9/00
Filed: 1991-12-05
Granted: 1993-09-23
Abstract: A snap ring mounting device comprises a snap  ring  cartridge having a piston spring, a support plate for supporting snap  rings and  a stopper;  and  a  tip  member  having  an   air   pressure opening/ closing device  built  in.  An  air  pressure  passage  is extended to an air pressure passage, and a ring case is located to communicate with the snap ring cartridge and a main body of a  air gun, thereby improving an efficiency of operation and the loss  of snap rings.
Patent KR-940003058-B1 (KR)
Title: Sports exercising device of chair system
Inventor: HO YONG-BAEK
IPC: A63B23/02
Filed: 1991-12-07
Granted: 1994-04-13
Abstract: Left bedding abdomen exercising equipment comprise a width controlling portion, a back plate, an arm rest which is movable vertically and horizontally, knee connecting means for operating said arm rest toward knee, thereby giving furniture-type exercising equipment.
Patent KR-970000104-B1 (KR)
Inventor: HAN M HUSA
IPC: H01F1/04
Filed: 1991-12-30
Granted: 1997-01-04
Abstract: 내용 없음.
Patent KR-0167354-B1 (KR)
Title: Ground anchoring system
Inventor: PETER ALSOP
IPC: E02D5/80
Filed: 1990-02-21
Granted: 1999-02-18
Abstract: PCT No. PCT/GB90/00273 Sec. 371 Date Aug. 15, 1991 Sec. 102(e) Date Aug. 15, 1991 PCT Filed Feb. 21, 1990 PCT Pub. No. WO90/10114 PCT Pub. Date Sep. 7, 1990.A ground anchor comprises a generally flat anchor plate folded into a U or V-shape against a resilient bias. The resilient bias may be inherent in the folded portions of the anchor plate, or may be provided by means of auxiliary or plate springs disposed between the folded portions. In the latter, a retaining pin may secure the folded portions together while driving the plate into the ground. A release arrangement shears the pin so that the plate springs open to resist subsequent extraction.
Patent KR-960000374-B1 (KR)
Inventor: MASHITA NORIYOSHI
IPC: B08B3/08
Filed: 1992-01-27
Granted: 1996-01-05
Abstract: 내용 없음.
Patent KR-940008250-B1 (KR)
Title: Nuclear fuel channel and natural safety water cooled type tube reactor using this
Inventor: JANG SUN-HUNG
IPC: G21C3/28
Filed: 1992-02-11
Granted: 1994-09-09
Abstract: The channel applies to the nuclear plant, the local heating reactor, and the study reactor, and to various other reactor systems. The nuclear fuel channel includes a nuclear fuel channel tube (2), a cylindrical metal nuclear fuel matrix (4), cylindrical holes (5 and 5A). The tube reactor includes a reactor (50) which arrays in a low pressure reactor vessle (40), a moderator tank (56) which has a safety valve (58) and circulates the moderator in the reactor (50), a moderator cooling heat exchanger (59) which cools the moderator by cooling water, a steam generator (52) which generates steam by the energy of the reactor (50), and a pressure unit (51) which pressures the coolant of the steam generator (52).
Patent KR-940005052-B1 (KR)
Title: Method of relay breakage prevention in microwave oven
Inventor: MIN YONG-MO
IPC: H05B6/66
Filed: 1992-02-15
Granted: 1994-06-10
Abstract: The method includes a main routine in which a time of relay ON or OFF is detected by one-second flag and during-cooking flag and a first counter value is stored in a memory, and an interrupt routine in which a relay is controlled according to the relay ON or OFF time if the first and second counter values are equal, thereby maximizing the duration of relay contact.
Patent KR-950010880-B1 (KR)
Title: Detector of rotor location for the brushless d.c motor
Inventor: CHONG YONG-CHUN
IPC: H02K29/10
Filed: 1992-05-06
Granted: 1995-09-25
Abstract: The apparatus comprises a set of light reflecting members(31) attached to the surface of the rotor(3) of a motor in symmetry, and a set of light non-reflecting members(32) attached to the surface of the rotor(3) of the motor and arranged alternately within the light reflecting members(31). A pair of transmitting and receiving optical fibres(41)(42) are positioned at one end to face the surface of the rotor(3) in the housing. A pair of light emitting and photoelectric converting elements(5) are respectively positioned to face the other end of the pair of transmitting and receiving optical fibres(41)(42). Connecting guide members(75)(78) are positioned on the inner and outer sides of a glass plate(76). A simple configuration is provided without damaging the sealing of the closed compressor using a brushless motor.
Patent KR-100260550-B1 (KR)
Title: Data transfer method in semiconductor memory
Inventor: HAN KYU-HAN
IPC: G11C11/40
Filed: 1992-09-07
Granted: 2000-07-01
Abstract: PURPOSE: A data transmission method in a semiconductor memory device is provided to improve the overall efficiency of the semiconductor memory device by preventing the mis-operation of each circuit in a semiconductor chip and suppressing noise generated during data transmission. CONSTITUTION: The semiconductor memory device consists of a data register, a cell array corresponding to the data register and a number of memory blocks which include transmission gate transistor transmitting data between the data register and the memory cell array. After a control stage of the transmission gate receives a data transmission control signal, it transmits the data transmission control signal to one memory block selected among the memory blocks at first, and then to another memory block after a fixed time delay sequentially.
Patent KR-100250542-B1 (KR)
Title: Lubricants
Inventor: CORR STUART
IPC: C10M171/00
Filed: 1992-10-10
Granted: 2000-04-01
Abstract: A working fluid composition comprising:   (A) a heat transfer fluid comprising a mixture of at least two compounds selected from the group consisting of hydrofluoroalkanes and fluoroalkanes; and (B) sufficient to provide lubrication of a lubricant which is at least partially soluble in each component of the heat transfer fluid.
Patent KR-970004740-B1 (KR)
Title: Communication system for a car
Inventor: HWANG KYU-CHUN
IPC: B60Q1/50
Filed: 1992-10-30
Granted: 1997-04-03
Abstract: Disclosed is a communication system for a car.  In the system, a display board(31) where various messages are loaded with vinyl sheet is rolled on a shaft(32).  The rolled display board(31) is unrolled by lifters(21) of a drive(10).  A shuttle cat(30) on a holing body(35) moves behind and forward by cat rollers(14a).  A position switch(40) is installed between the shuttle cat(30) and holing body(35) to sense the location of movement.  Thereby, the character message loaded on the display board(31) is shown to a driver of following car.
Patent KR-950008256-B1 (KR)
Title: Making method of n-channel semiconductor element
Inventor: KANG DAE-GWAN
IPC: H01L29/78
Filed: 1992-11-19
Granted: 1995-07-26
Abstract: growing a field oxide layer (2) on the p-type semiconductor substrate (1) and forming a gate insulating layer (3) sequentially; depositing a polysilicon (4) and ion-implanting p-type ion on the polysilicon sequentially; depositing the first insulating layer (5) and forming a gate by patterning the polysilicon and the first insulating layer sequentially; having thermal processing in order for the injected p-type ion to be diffused; ion-implanting low concentrated n-type ion on the surface of the substrate with a gate as a mask; forming the second insulating layer (6) on the side wall of the gate and forming the third insulating layer (7) on the active region of the second insulating layer sequentially; removing the first insulating layer and ion-implanting highly concentrated n-type ion in the substrate and the gate sequentially; and depositing the fourth insulating layer (9) and the fifth insulating layer (10), forming a source and drain varied contact hole, and forming source and drain electrodes (11) sequentially.
Patent KR-950012735-B1 (KR)
Title: Cache memory
Inventor: PARK CHAN-SHIK
IPC: G06F12/08
Filed: 1992-12-14
Granted: 1995-10-20
Abstract: a processor; an internal cache memory included in the processor; an external cache memory; a cache controller for generating a data invalidation request signal when the external cache memory is full; a snoop controller for generating the data invalidation request signal when the content of the external cache memory differs from that of a main memory or state information of the content of the external cache memory varies; and an internal snoop controller for inputting the data invalidation request signals from the cache controller and the snoop controller to invalidate the corresponding data of the internal cache memory.
Patent KR-960013154-B1 (KR)
Title: Fabricating method of semiconductor device
Inventor: LEE SANG-KYU
IPC: H01L21/316
Filed: 1992-12-31
Granted: 1996-09-30
Abstract: The method of fabricating semiconductor device comprises the steps of : forming an insulating layer(3) for diffusion-blocking on a silicon substrate(1); forming a heavily doped BPSG(Boro Phospho Silicate Glass) film(4) on the insulating layer(3); nitrifying the surface of the BPSG film(4) by injecting N2 into the BPSG film using ion-injector; and flattening the BPSG film(4) by high-temperature thermal processing.
Patent KR-100227083-B1 (KR)
Inventor: JO OK-KYEONG
IPC: G11B7/0055
Filed: 1992-12-31
Granted: 1999-10-15
Abstract: 본 발명은 기판위에 팽창층과 소거층이 형성된 광학기록매체로서, 팽창층(2)과 소거층(3) 사이에 일반식(I)로 표시되는 금속적인 반사를 나타내는 유기색소 단결정의 단독 반사층(4)을 두거나, 소거층을 일반식(I)의 유기색소 단결정과 기타 유기색소와의 혼합소거층(3')으로 구성하여 기록의 재생시 기록부와 미기록부의 반사율 차이의 증가로 콘트라스트가 향상되고 C/N비가 증가하는 효과가 있으며, 기록의 소거시에는 열패드에 의한 접촉방식이나 열조사에 의한 열전달로 기록을 소거시키는 소거 가능한 광학 기록매체에 관한 것이다.
Patent KR-940010264-B1 (KR)
Title: Apparatus for drying and heating laver
Inventor: KIM JAE-KI
IPC: A23L17/60
Filed: 1993-01-08
Granted: 1994-10-22
Abstract: The green seaweed (I) toasting device comprises the steps of: (1) toasting one side of (I) through the zigzag shaped heater above the conveyor; (2) spreading the salt using a specially degisned rod and the sesame oil; (3) toasting the other side of (I) in the same way as in (1). This device distributes the salt and the oil to give (I) even quality and also to save time to distribute the salt and the oil.
Patent KR-100266849-B1 (KR)
Inventor: STARZESTARZEWSKI KARL-HEINZ AL
IPC: C08J5/18
Filed: 1993-04-07
Granted: 2000-09-15
Abstract: 본 발명은 폴리비닐 알콜-용매 혼합물을 주형 또는 압출시키고(이때, 폴리비닐 알콜은 이색성 물질을 함유한다), 건조시킨 다음, 300 내지 1200%까지 필름을 연신시켜(이때, 미연신 필름의 폭(b 0 )에 따라, 연신 간격(l 0 )이 b 0 /l 0 가 3미만의 조건을 만족시키도록 제공된다) 더욱 높은 이색성 흡광지수를 유도하는, 폴리비닐 알콜과 하나 이상의 이색성 물질을 기본으로 하는 편광 필름을 제조하는 방법에 관한 것이다.
Patent KR-960006975-B1 (KR)
Title: Manufacturing method of field oxide of semiconductor device
Inventor: YUK HYUNG-SUN
IPC: H01L21/316
Filed: 1993-05-21
Granted: 1996-05-25
Abstract: The field oxide film is prepared by (A) forming a pad oxide(2), a polysilicon(3) and a nitride films on a silicon substrate by turns, (B) arranging the first separating mask(5) on a nitride film(3), (C) etching the exposed nitride film(3), (D) forming a buffer oxide film(6) and a buffer nitride film(7) after removing the first separating mask(5), (E) arranging the second separating mask(8) on the buffer nitride film(7), (F) etching the exposed buffer nitride(7), (G) removing the remained buffer nitride film(7) after forming a field oxide(9) by growing the buffer oxide(6) after the second separating mask(8), and (H) removing Bird's Beak by arranging the mask(10) on the field oxide film(9). This method is useful for minimizing the Bird's Beak then increasing the memory cell operating region.
Patent KR-950011160-B1 (KR)
Title: Stepless auto transmission
Inventor: NA JONG-O
IPC: F16H3/52
Filed: 1993-05-29
Granted: 1995-09-28
Abstract: a variable speed section(10) receiving the power generated from an engine and transmitting it to an output axle(72) to vary a speed; a speed increasing section(50) capable of overdrive; and a variable speed control section(80) automatically controlling a rotation ratio corresponding to a load of the output axle(72). The variable speed section includes: an input sun gear(14) receiving the power generated from the engine; a number of input differential gears(34) engaged with the input sun gear(14); a number of contol differential gears(36) respectively formed with the input differential gears(34) in a body; a number of output differential gears(38) respectively engaged with the input differential gears(34); fixing pins(30,32) and carriers(26,28) for respectively supporting the differential gears; and a middle speed ring gear(44) engaged with the outer of the input differential gears(34) to control only the middle speed according to the requirement. The speed increasing section includes: a carrier(62) having a ring gear axle(52) for receiving a rotation of the varied speed; a planetary gear(68) transmitting the rotation of the carrier(62); and a speed increasing sun gear(56) engaged with the inner side of the planetary gear(68).
Patent KR-970000610-B1 (KR)
Inventor: NAGAMURA SHINYA
IPC: B41J11/08
Filed: 1993-05-31
Granted: 1997-01-16
Abstract: 내용 없음.
Patent KR-960004380-B1 (KR)
Title: Process for the preparation of carbon matrix
Inventor: KIM JE-YOUNG
IPC: C04B24/36
Filed: 1993-06-16
Granted: 1996-04-02
Abstract: The carbon molded body having flexural strength of 600-1,000 kgf/cm2 and apparent density of 1.4 g/cm2 is manufactured by (a) mixing semicokes including 2-6% beta resin and potential anisotropic pitch having softening point of above 300 deg.C in the weight ratio of 90:10-80:20, (b) pulverizing the mixture containing the mixed solvent of water and ethanol to have the particle size of below 100 mesh with a ball milling, (c) filtering and drying the mixed solution and molding the dried body with pressure of 1,500-2,000 kg/cm2, (d) firing the molded body at above 700 deg.C and 5-7 deg.C/min for 60 min. in inert atmosphere.
Patent KR-100265199-B1 (KR)
Title: Apparatus drive for high tension discharge lamp
Inventor: YUN JONG HWAN
IPC: H02M7/5387
Filed: 1993-06-21
Granted: 2000-09-15
Abstract: PURPOSE: A high voltage discharge lamp driver is provided to instantaneously light a high voltage discharge lamp by outputting a discharge start voltage higher than tens volts of thousands. CONSTITUTION: A main power supply(10) converts an alternating current power into a direct current power. An auxiliary power supply(20) converts an alternating current power into a direct current power. A gate driver(10) outputs the first and second gate signals having the same phases when a power from the second power supply(20) is supplied thereto. An inverter(40) generates a positive pulse when the first and second gate signals from the main power supply(10) are inputted thereto, and generates a negative pulse when the third and fourth gate signals from the main power supply(10) are inputted thereto. A lighting circuit(50) divides positive and negative pulses from the inverter(40) by a voltage higher than tens volts of thousands.
Patent KR-970005141-B1 (KR)
Inventor: SHUNPEI YAMAZAKI
IPC: B23K26/067
Filed: 1993-06-25
Granted: 1997-04-12
Abstract: 내용없음.
Patent KR-100292937-B1 (KR)
Title: 부연소실식디젤엔진
Filed: 1993-07-15
Granted: 2001-09-17
Abstract: 실린더 중심축선(3)과 평행한 방향에서 보아 분구(4)로부터 분사된 연소팽창가스가 분구(4)의 분사축선(12)의 양옆에 위치하는 한쌍의 선회가스류(6)(7)를 형성하도록 한다. 그리고 피스톤정면(8)에 한 쌍의 밸브리세스(10)(11) 내에 한 쌍의 선회가스류(6)(7)의 각 선회중심(14)(15)을 각각 위치시킨다.
Patent KR-960000270-B1 (KR)
Title: Optical pick-up apparatus
Inventor: KIM EUN-JIN
IPC: G11B7/1356
Filed: 1993-07-16
Granted: 1996-01-04
Abstract: The device consists of the first polarization beam dividing unit which has a laser diode, a collimation lens which makes laser beam as plane beam, and the first border plane that reflects some parts of P wave and whole parts of S wave, the second polarization beam dividing unit which has an object lens which focuses polarized P wave on a magnetic disk, a half wavelength unit which tilts polarization direction by 45 degree, the second border plane which transmits incident beam as P wave and reflects S wave, and a declining side which reflects the incident P wave in same direction with the S wave, and an eight-division optical detecting unit which detects tracking error, focusing error, and optical information.
Patent KR-960014723-B1 (KR)
Title: Method of manufacturing semiconductor with gate isolation diffusion
Inventor: KWON MYUNG-YEUN
IPC: H01L21/336
Filed: 1993-08-25
Granted: 1996-10-19
Abstract: The method is for manufacturing double structure gate insulator to relieve the mechanical stress of W-polycide. The method comprises the steps of : forming a SiO2 film(2a) on a silicone substrate(1) by dry oxidation method; and forming a gate insulator(2) of SiO2/Si3N4 by forming a Si3N4 film(2b) by LPCVD.
Patent KR-970001335-B1 (KR)
Title: Laundry quantity displaying and alarming apparatus and the washing method for a washing machine
Inventor: KIM DONG-KOOK
IPC: D06F33/02
Filed: 1993-10-20
Granted: 1997-02-05
Abstract: Apparatus for displaying/alarming a laundry quantity of washing machine measures a laundry quantity by measuring a quantity of load loaded on a driving torque. The apparatus measures a driving torque from a driver(6) driving a washing tub(1), detects a current of this load by using a current detector(7), converts this signal to a digital signal by using a A/D converter(8), reads a signal level of the A/D converter(8) from the controller(9), displays the laundry quantity through a display part(10), and informs a state that the laundry quantity and water quantity are proper by using alarm part(11).
Patent KR-970004611-B1 (KR)
Title: Vcr lock apparatus and lock and unlock method using magnetic card
Inventor: SO MYUNG-KOOK
IPC: G11B5/02
Filed: 1993-10-29
Granted: 1997-03-29
Abstract: An apparatus for locking a VCR using a magnetic card and a method for locking and unlocking it are disclosed. The apparatus for locking the VCR comprises an amplification unit(20) for amplifying the electrical signal from a hall element(10) established at a magnetic card reader(1) when a movement of a magnetic card(2) is sensed; a noise filter(30) for filtering a noise component of the signal from the amplification unit(20); a signal converting unit(40) for converting the output signal from the filter(30) to a digital signal; and a microcomputer(MICOM) for locking or unlocking the VCR according to the output signal from the signal converting unit(40).