baber/WOPTO huggingface dataset:
Patent KR-20000013631-A (KR)
Title: Latch device of copier having cam
Inventor: KIM JEONG HWAN
IPC: G03G15/00
Filed: 1998-08-11
Abstract: PURPOSE: A latch device of copier having cam is provided to improve quality of copy and remove shaking. CONSTITUTION: A device comprises a guide member(40) connected lower of a upper body(16), a first latch bracket(46) slided with interior of the guide member(40) and attaching a first latch member(44), a first cam(50) protrudingly formed at regular intervals, a connection member(56) installed at lower face of the first latch bracket(46) via a connection screw(58), a operation lever(62) connected with the connection member(56), a hinge axis(66) pivotally connected between both sides of the bracket(64) of the body(15), a fixing plate(74) fixed on a fixing portion(72) of lower body(28), and a plurality of second cams(80) having a sliding face(78).
Patent KR-20000018851-A (KR)
Title: Apparatus for plasma etching
Inventor: LEE SE HYEONG
IPC: H01L21/3065
Filed: 1998-09-05
Abstract: PURPOSE: An apparatus for plasma etching is provided to seal up stably a part coupling an upper electrode and a chamber in progressing an etching process. CONSTITUTION: An apparatus for plasma etching comprises a chamber(20), an upper electrode(30), and a sealing member(52,62). The chamber has an opening(50,60) having a perihelial surface of plane surface formed in upper surface thereof. The upper electrode is coupled/separated to/from the chamber, and has a contact surface(38) thereof formed in parallel so that it is corresponded to the perihelial surface of the opening on an interior surface thereof. Also, The contact surface of the upper electrode is disposed on the perihelial surface of the opening when it is coupled to the chamber. The sealing member is disposed on the perihelial surface of the opening, and seals up between the upper electrode and the chamber. Thereby, a part coupling an upper electrode and a chamber is stably sealed up in progressing an etching process.
Patent KR-20000018939-A (KR)
Title: Device for outputting an answer toward an modem at command to a signaling tone
Inventor: CHANG KIL HUN
IPC: H04B7/26
Filed: 1998-09-07
Abstract: PURPOSE: A device is provide, so that a user can hear processing result of a modem At command as a signaling tone in cellular phones CONSTITUTION: A device, which a cellular phone receives a modem At command from a data terminal, performs corresponding process, and transmits the process result to the data terminal as a predetermined code, comprises: a signaling tone generating section for generating a few special signaling tones by receiving a predetermined control; a controlling section for controlling the signaling tone generating section, as preset signal generating data according to the result to generate special signaling tones.
Patent KR-19990029714-A (KR)
Title: 셀프 타임 동작용 윈도우 판별기를 갖는 2차측 감지증폭기
IPC: G11C11/409
Filed: 1998-09-11
Abstract: 데이터 소스로부터 데이터를 감지하고 그것에 응답하여 한 쌍의 출력라인을 구동시키기 위한 감지 시스템은, 상기 데이터를 감지하고 저장하기 위해 상기 데이터 소스에 동작가능하게 결합된 1차측 감지 디바이스; 한 쌍의 입력라인을 통해 상기 1차측 감지 디바이스에 동작가능하게 결합되고 상기 한 쌍의 출력라인에도 동작가능하게 결합된 2차측 감지 디바이스를 포함하며, 상기 2차측 감지 디바이스는 상기 1차측 감지 디바이스에 의해 저장된 데이터에 따라서 상기 한 쌍의 입력라인에 걸쳐 발생된 차동전압에 응답하고,  상기 2차측 감지 디바이스는 네거티브 드레스홀드 및 포지티브 드레스홀드에 의해 한정된 차동전압 드레스홀드 범위를 가지며, 상기 2차측 감지 디바이스는 상기 한 쌍의 입력라인에 걸친 차동전압이 차동전압 드레스홀드 범위내에 있을 경우에는 제 1 출력조건으로, 상기 차동전압이 네거티브 드레스홀드에 최소한 동일한 경우에는 제 2 출력 조건으로, 그리고 상기 차동전압이 포지티브 드레스홀드에 최소한 동일한 경우에는 제 3 출력 조건으로 상기 한 쌍의 출력라인을 구동시킨다.
Patent KR-20000019987-A (KR)
Title: High-density optical recording medium
Inventor: PARK JUNG WOO
IPC: G11B7/257
Filed: 1998-09-17
Abstract: PURPOSE: A high-density optical recording medium is provided to improve a recording density by forming a non-linear semiconductor material layer between a substrate and a lower dielectric layer. CONSTITUTION: A high-density optical recording medium comprises a semiconductor material layer for collecting an incident light and a dielectric layer having a self focusing effect. The semiconductor material layer is formed between a substrate(16) and a record film(14), and has a nonlinear characteristic. The dielectric layer is formed between the record film(14) and the semiconductor material layer. The recording medium comprises a reflection film(12) for reflecting a light collected at the record film, an upper dielectric layer(13) formed between the record film and the reflection film, and a protection layer(11) formed on the reflection film.
Patent KR-19990030198-A (KR)
Title: 흡수성 물품
IPC: A61F13/15
Filed: 1998-09-28
Abstract: 흡수 적층체를 가진 위생 냅킨과 같은 본 발명의 흡수성 물품은 적층체의 피부 비접촉면상에 변형 유도 수단을 가진 것으로서 제공된다. 변형 유도 수단은 소수성 패널 부재와 탄성 신축 부재를 포함하며, 이 때, 탄성 신축 부재는 자신의 수축력하에서 중앙을 향해 패널 부재를 당김으로써, 적층체의 피부 접촉면을 향해 패널 부재를 볼록 모양으로 변형시키기에 적합하다. 변형 유도 수단에 의한 패널 부재의 볼록 모양 변형은 적층체가 볼록 모양으로 변형되도록 한다.
Patent KR-19990030280-A (KR)
Title: 신호를 재생하는 장치와 방법 및 신호를 기록하고, 재생하는 장치와 방법
IPC: H04N5/85
Filed: 1998-09-30
Abstract: 사용자가 재생동작을 시작하는 순간으로부터, 사용자가 실제적으로 요구된 정보를 확인할 수 있는 순간까지의 시간이 요구되지 않는 신호재생 장치가 기술되어 있다. 오디오-비데오 신호재생장치는 기록매체에 기록된 오디오-비데오 신호를 기록하는 헤드와, 헤드에 의해서 판독된 오디오-비데오 신호가 일시적으로 저장되는 RAM과, 기록매체에 기록된 오디오-비데오 신호를 판독하기 위해 헤드를 제어하고, RAM내에 일시적으로 저장된 오디오 비데오 신호를 기록하는 것을 제어하는 제어기능을 가지고 있는 제어회로로 구성되어 있다.
Patent KR-20000024982-A (KR)
Title: Apparatus for detecting output power of wireless terminal
Inventor: SUH HO SOO
IPC: H04B1/40
Filed: 1998-10-07
Abstract: PURPOSE: An apparatus for detecting an output power a wireless terminal is provided to separate a part for detecting an output electric power from a part for amplifying an electric power and measure the output electric power. CONSTITUTION: An apparatus for detecting an output power a wireless terminal includes a battery(330) for supplying a power, a filter(340) having an inductance component, a part(350) for amplifying an electric power connected to the output unit of the filter, a detection part(370) detecting a predetermined electric power. Wherein, the inductance component is connected to between the battery and the part for amplifying an electric power. The detection part is in between the battery and the part for amplifying an electric power and detects an output electric power.
Patent KR-20000028001-A (KR)
Title: Construction of terminal equipment for locating place of origination
Inventor: CHU BONG JIN
IPC: H04B7/26
Filed: 1998-10-30
Abstract: PURPOSE: A construction of a terminal equipment for locating a place of origination is provided to prevent social problems such as stray children, abduction, violence, robbery, by finding out a subscriber's location through reversely using the fact that coverage regions of a base station is narrow, by a CT-2(Cordless Telephone-2) network, and to help industry development such as material systems and remote controlling systems. CONSTITUTION: A communication system connected with a terminal(20) having a functional key(23), a transmitter/receiver(25), a displayer(27), a power supplier(28), an antenna(29), as a base station server and a CT-2(Cordless Telephone-2) network comprises a dial tone generator/detector(24), a tracking frequency generator(26), a memory unit(22), and a controller(21). The dial tone generator/detector(24) generates and detects a tone through the antenna(29) and the transmitter/receiver(25). The tracking frequency generator(26) generates tracking frequency when pressing a button for emergency on the functional key(23). The memory unit(22) stores a server telephone number, a terminal ID, an originating cycle, except basic programs. The controller performs location information origination, a compulsory delivery of a specific signal, generation of the tracking frequency, a reception function of a paging signal, according to programs of the memory unit(22) when power supply is applied through the power supplier(28).
Patent KR-19990037556-A (KR)
Title: 통신 네트워크에서 단일 콜링 동안 다중 콜링 카드들을 수용하는 방법
IPC: H04M17/00
Filed: 1998-10-28
Abstract: 단일 콜링 동안 오퍼레이터 서비스 시스템(OSS)으로 다중 콜링 카드 사용에 대한 빌링(billing)을 자동으로 실행하는 방법이 개시된다. OSS에서 수신된 다중 콜링 카드 번호들이 유효하게 되고 최대 콜링 지속 시간이 결정된다. 콜러에 의해 최초로 제공된 모든 콜링 카드 어카운트들의 밸런스 디플리션에 앞서 콜러는 다가오는 밸런스 디플리션을 통보받으며, 이어서 다른 콜링 카드 어카운트들에 대한 동일한 콜링을 빌링하기 위해 옵션이 주어진다. 콜러가 다른 빌링 준비를 하고 있는 동안 네트워크 리소스들이 유지된다. 소정 시간 이후에 만약 다른 빌링 준비들이 이루어지지 않았으면, 콜링의 접속은 끊기고 네트워크 리소스들은 해제된다.
Patent KR-20000031087-A (KR)
Title: Method for penetrating washing of centrifugal penetrating washing machine
Inventor: U KYEONG CHEOL
IPC: D06F33/02
Filed: 1998-11-03
Abstract: PURPOSE: A method for penetrating washing is provided to prevent an unbalance generated by grouping together the washing inside an inner washing tub, to prevent the spring-out of washing water and bubbles to the outside of an outer washing tub, to reduce power consumption, and to obtain an improved washing efficiency by quickly performing a washing process. CONSTITUTION: A washing process is performed by a rotation of a motor(104) after finishing an input of the laundry and a water supply into an inner washing tub(103). A driving shaft is rotated leftward and rightward by the left and the right rotations of the inner washing tub(103), and the inner washing tub(103) is rotated leftward and rightward by the left and the right rotations of the driving shaft. Therefore, the laundry of the inner washing tub(103) is washed by a water current of a washing water with the left and the right rotations of the inner washing tub(103). A centrifugal penetrating washing is performed by increasing the rotated force of the motor at high speed. An unbalance by the washing is minimized by performing the centrifugal penetrating washing with controlling the rotation number of the motor(104), and the spring-out of polluted materials contained in the washing water to the outside of an outer washing tub(102) is prevented.
Patent KR-20000033207-A (KR)
Title: Smd-type super-compact sound converter
Inventor: HWANG MAN SOO
IPC: H04R9/00
Filed: 1998-11-20
Abstract: PURPOSE: An SMD(surface mount device) type sound converter is provided to promote the reduction of labor costs and the improvement in productivity by automatically mounting a sound converter and contacting electrodes without brazing. CONSTITUTION: In a sound converter, a magnetic circuit unit(63) is composed of a circular permanent magnet(61), a yoke plate(62), a cup-shaped yoke(60) and a circular yoke plate(62). A vibration unit(66) is made up of a voice coil(64) inserted into a magnetic gas between the yoke(60) and the yoke plate(62), and a vibration plate(65) having a fixed bobbin wound with the voice coil. The magnetic circuit unit and the vibration unit are combined with a lower recessed groove of a housing(20). Three combining protrusions(21-23) are arranged per 120 degrees on the outer circumference of the housing. A protector is combined on the lower end of the housing to protect the magnetic circuit unit and the vibration unit. The upper portion of spring terminals(30,35) is inserted into the lower portion when the sound converter is combined to a PCB(printed circuit board). Therefore, the contact distance is extended and the entire height of the product is reduced.
Patent KR-19990014586-A (KR)
Title: 직기용 판형 종광의 성형방법
IPC: B21G1/00
Filed: 1998-11-25
Abstract: 본 발명은 워터젯트, 에어젯트, 레피어 등 고성능 직기용판형 종광(FLAT HEALD)의 성형방법에 관한 것으로, 종광폭을 갖는 스테인레스스틸 박판(S)을 Q,T(quenching)(tempering) 열처리하는 1공정과, 금형에 공급하여 박판(S)의 가운데 세폭부(1)를 컷팅하고 박판(S)을 이송하여 양측 세폭부(2)(3)를 컷팅하고 이송하여 좌·우측귀(耳)(4)(6)와 좌·우측눈(目)(5)(7)과 중앙부눈(目)(8)을 펀칭 하여 되감기를 하는 2공정과, 컷팅 및 천공된 박판(S)을 미세연마(출원인이 개발한 공개불원의공법)하는 3공정과, 종광박판(S)의 중앙부(A)를 일정각으로 밴딩하고 좌측귀(4)의 양단(401)(402)을 성형하며 우측귀(6)와 눈(7) 사이의 외측에 통경위치(10)를 단조성형하고 박판(S)의 일측을 절단부(B)를 파팅하여 종광체를 형성하는 4공정과, 종광체를 전해 연마 및 니켈도금을 하는 5공정을 순차로 행하여 판형종광을 생산함으로서 스테인레스스틸 박판(S)을 열처리 후에 세폭부(1)(2)(3)를 가공하여 종광이 뒤틀려서 변형되는 것을 방지할수 있어 불량률을 줄이고 공정별로 별도의 금형을 장치하는 번거로움을 방지할수 있음으로 작업능률이 증대되고 생산성이 우수한 판형 종광을 얻을수 있는 것이다.
Patent KR-19990062673-A (KR)
Title: 편성기용 편성요소를 운반하는 경량, 강성의 세그먼트
IPC: D04B27/06
Filed: 1998-12-01
Abstract: 경편기용  편성  요소를  운반하기  위한  세그먼트 (14) 는  수개의  동일한  플레이트 (6) 를  포함한다.        구멍 (15, 16, 17, 18) 이  상기  플레이트  내에  배치되고,  상기  구멍은  적어도  1 개의  중공핀 (19, 20, 21, 22) 에  의해  관통되며,  그  외주면에서  플레이트 (6) 와  결합한다.        이것은  경편기의  바에  부착하기  위한  세그먼트의  중량을  낮게  한다.
Patent KR-20000037864-A (KR)
Title: Method for drawing up document using object connection and embedded types
Inventor: PARK JIN SOO
IPC: G06F17/21
Filed: 1998-12-02
Abstract: PURPOSE: A method for drawing up document using object connection and embedded types is provided so that a document can be integrated to be compatible on operating system by using an OLE type. CONSTITUTION: A method for drawing up document using object connection and embedded types includes several steps. A first step is to store an image and text by using a OLE type to a first and second storage devices and to receive the needed information on the document. A second step is to draw up the document as a document meeting to the operating system by using the OLE type.
Patent KR-20000038141-A (KR)
Title: Device for moving pick-up of disc drive
Inventor: KIM CHEON GYEONG
IPC: G11B31/00
Filed: 1998-12-04
Abstract: PURPOSE: A moving device of pick-up is provided to drive a pick-up to read a signal and to read the recorded signal by radiating a light in a disc. CONSTITUTION: A pick-up base(50) is located in a playing position by inserting a disc and the disc is arrived in a turn table(51). A driving gear(70) is rotated by the rotation of a driving motor(60) and a double gear(75) butted with the driving gear(70) through a lower gear(76) is rotated. When the double gear(75) is rotated, a feed guide(82) is moved by connecting with a butted rack gear(83) during rotating the upper gear(77). When the feed guide(82) is moved, an optical pick-up unit(80) connected with the feed guide(82) is moved during guiding via guide shafts(81,81'). Because the feed guide(82) has a tendency to rotate in an arrow direction by a holding member(84), the rack gear(83) formed in the feed guide(82) is operated by butting in the upper gear(77) of the double gear(75) without a backlash. Therefore, the optical pick-up unit(80) is able to be exactly controlled.
Patent KR-19990024114-A (KR)
Title: 금속코일의 절단면 연마장치
Filed: 1998-12-04
Abstract: 본 발명은 금속코일을 절단했을 경우 그 절단면에 생기는 버(Burr)와 거침현상을 제거하기 위한 절단면의 연마장치에 관한 것이다. 
     본 발명은 금속코일의 이송로 양측에 2개의 롤러에 의해 지지 및 회전하는 샌드 페이퍼를 경사지게 설치하고, 상기 샌드 페이퍼와 금속코일의 이송을 안내하는 가이드 롤러를 교대로 설치하여서 된 것이다. 
     상기와 같이 구성된 본 발명은 금속코일의 양측 절단면이 교대로 연마 가공되고, 금속코일과 샌드 페이퍼의 접촉면적이 넓으므로 절단면의 버 및 거침현상이 효과적으로 제거된다.
Patent KR-20000038699-A (KR)
Title: Method for controlling bandwidth by control of data transmission range in network for transmission and reception
Inventor: LEE JI EUN
IPC: H04L12/28
Filed: 1998-12-08
Abstract: PURPOSE: A method for controlling a bandwidth in a network for transmission and reception of data is provided to allow participants in a conference via an image communication system to make the utmost use of a network bandwidth, by controlling the transmission range of transmitter data according to the states of a receiver network. CONSTITUTION: A plurality of transmission ranges are set according to the distance from a transmitter network to a receiver network. The data of the first transmission range is transmitted from the transmitter network to the receiver network during the first time which has been set preliminary. The transmission ranges are extended in stages from the second transmission range to the Nth transmission range whenever the first time is expired. The transmission ranges can be reduced if a busy message is received from the receiver network located in the first transmission range.
Patent KR-20000039184-A (KR)
Title: Playing back method for sector repeating in vcr
Inventor: KIM JAE HONG
IPC: G11B5/02
Filed: 1998-12-11
Abstract: PURPOSE: A playing back method for sector-repeating in a VCR is provided to rewind or review a video tape to the starting point of a block repetition by counting a time from a starting point to a finishing point of the block repetition to convert the counted time into a rewind or a review times while playing back a video tape. CONSTITUTION: A starting point of a block repetition is selected while playing back a video tape and the time from the starting point is counted. When a finishing point of the block repetition is selected, the playing back mode is converted into a stop mode while storing the counted time of block repetition in a memory after converting into a rewind time or into a review time. Also, the converted stop mode is converted into a rewind mode or into a review mode for counting the time while rewinding or reviewing the video tape. If the counted time reaches the stored rewind or review time stored in the memory, the corresponding point is decided as the starting point of the block repetition. Therefore, the rewind or the review mode is converted into the play back mode for playing back the video tape from the starting point of the block repetition while counting the time again. If the counted time reaches the time of block repetition stored in the memory, the corresponding point is decided as the end point of the block repetition for converting the play back mode into the rewind mode or into the review mode while operating the method repeatedly.
Patent KR-20000039439-A (KR)
Title: Apparatus for preventing tension weight box from falling
Inventor: KIM HYEONG SEOK
IPC: B65G23/44
Filed: 1998-12-14
Abstract: PURPOSE: An apparatus for preventing a fall of a tension weight box is provided to reduce repairing costs and to enhance productivity in transport by preventing troubles such as fall or damage of a weight box. CONSTITUTION: A cylinder(310) contracts a cylinder rod(312) to induce a sheave(110b) to the lower surface of a weight box(50). The sheaves(110b,110c) are separated from a guide rope(120) in a process of sliding over the guide rope, and the guide rope is shortened as much as the gap. Thus, the guide rope is integrated with the cylinder to restrict the weight box. In a sensing unit(200), a compressing member influences a rod cell with a larger amount of setting load than usual one. Therefore, the weight box is prevented from a fall at the same point as the cylinder as the cylinder rod is contracted.
Patent KR-20000041574-A (KR)
Title: Pickup actuator
Inventor: SHIN GYEONG SIK
IPC: G11B7/09
Filed: 1998-12-23
Abstract: PURPOSE: A pickup actuator is provided to prevent the generation of a rolling phenomenon by conforming the centers to gravity and driving in operating focusing and tracking. CONSTITUTION: Two yolks(116) are arranged face each other along a tracking direction. A couple of permanent magnets(132) are attached on the facing surfaces of the yolks. Herein, the flux directions of the magnets are parallel with the tracking direction. A driving unit contains focusing coils(134) and tracking coils(136). The tracking coils are wound up to face the side surfaces of the permanent magnet. The flux density distribution of magnetic field is vertically formed with the tracking direction. Therefore, the driving center of a lens holder(120) is placed on the parallel line with the tracking direction. Even if the gravity center of the lens holder is replaced, the strength of flux density is unified at the replaced location.
Patent KR-20000042130-A (KR)
Title: Device for generating swirl of impregnated nozzle for continuous casting process
Inventor: KIM IN CHEOL
IPC: B22D11/10
Filed: 1998-12-24
Abstract: PURPOSE: A device for generating swirl of an impregnated nozzle for continuous casting process is provided to rotate molten metal in the process of which molten metal flows from a tundish and passes through a pipeline of an impregnated nozzle. CONSTITUTION: While molten metal stored in a tundish is vented by passing through a sliding gate installed on a pipeline of an impregnated nozzle by head difference, the molten metal collides with an inducement member(30). The molten metal passing through the inducement member flows while rotating in circumference of the nozzle and is supplied into a mold via vent holes. The movement path of the molten metal is lengthened by adding rotational flow and mixing of molten metal is performed actively. Thus, the distribution of the molten metal becomes uniform.
Patent KR-20000042211-A (KR)
Title: Uncoiler able to continuously supply coils
Inventor: KIM DONG SEOP
IPC: B21C47/00
Filed: 1998-12-24
Abstract: PURPOSE: An uncoiler to be able to continuously supply coils is provide to perform a continuous producing operation of components by reducing a time spent to shift coils. CONSTITUTION: A font end of a coil installed on a drum(20) is pushed toward a upper and a lower supply rollers(32) separated between a pair of guiding pipes installed inside the drum(20). The front end of the coil is inserted between the drum(20) and the supply rollers(32) by driving an elevating cylinder of supplying roller. The coil is corrected in a straight state during withdrawing toward a correcting device(40) when a driving motor(38) is rotated. A part without correcting in the front end of the coil is cut with a cutter. The coil is supplied to a main body of a processing machine by removing a burr generated at the cutting. When the correcting and the withdrawing processes of coil are performed and the new coil is installed in the empty drum(20) in the other side at the same time, the continuous supply of coils is available by a repetition of the operation.
Patent KR-20000042980-A (KR)
Title: Method for forming metal wiring of semiconductor device
Inventor: MUN BYUNG O
IPC: H01L21/28
Filed: 1998-12-28
Abstract: PURPOSE: A dual damascene method for forming metal wiring of a semiconductor device is provided to reduce a permittivity of a dielectric layer and to prevent an etch-stop. CONSTITUTION: In a dual damascene process, a buffer layer(30) is deposited on a semiconductor substrate(10) having a metal wiring(20) formed therein. Next, a nitride layer is formed on the buffer layer(30), and then selectively etched to form a nitride plug(40'). The etch process of the nitride layer is performed while power is applied in a range of 300 to 700 W and pressure is in a range of 100 to 200 mTorr. In addition, CHF<SB POS="POST">3</SB> gas is supplied with a flow rate in a range of 30 to 60 sccm(standard cubic cm per minute), CF<SB POS="POST">4</SB> gas is supplied with a flow rate in a range of 10 to 30 sccm, and Ar gas is supplied with a flow rate in a range of 50 to 100 sccm. Next, a dielectric layer(50) is formed on the buffer layer(30) to the same thickness than the nitride plug(40'). Then, a photoresist layer(60) is deposited on the dielectric layer(50) and etched to form a first contact hole for exposing the nitride plug(40'). The nitride plug(40') exposed through the first contact hole is then removed, and therefore a second contact hole is formed in the dielectric layer(50) while exposing the metal wiring(20). The first and second contact holes are then filled with a copper layer.
Patent KR-20000043986-A (KR)
Title: Programmable pll circuit
Inventor: CHOI JUN HYUK
IPC: H03L7/00
Filed: 1998-12-29
Abstract: PURPOSE: A programmable PLL circuit is provided to improve a device performance by reducing a time required to obtain a lock time. CONSTITUTION: A programmable PLL circuit comprises a PLL start signal output part(49), first and second lock time storing parts(50,51), a comparator(52), a switch control part(48) and a loop filter(45). The PLL start signal output part(49) outputs a start signal of a PLL operation, and the first lock time storing part(50) is operated responsive to the start signal, and performs a count operation until a lock detection signal is inputted from a phase detector(44). The second lock time storing part(51) is set so as to have a lock time set by a user. The comparator(52) compares outputs of the first and second lock time storing parts(50,51), and the switch control part(48) generates switch control signals in response to the result of the comparator(52). A resistance value of the loop filter(45) is varied according to the switch control signals from the switch control part(48).