baber/WOPTO huggingface dataset:
Patent KR-20030054330-A (KR)
Title: AAL2 channel connection method between Node B and RNC in wireless communication system
Inventor: KIM JU HUI
IPC: H04B7/155
Filed: 2001-12-24
Abstract: PURPOSE: A method for connecting an AAL2 channel between a base station and an RNC(Radio Network Controller) in a wireless communication system is provided to supply a resource management algorithm for setting/cancelling the AAL2 channel, and to supply a method of connection-supporting and routing each interface module between the base station and the RNC, thereby reducing load of the interface modules. CONSTITUTION: A system receives an AAL2 connection setup request from an upper application program(323) of an RNC(32), assigns resources, and performs an internal setup(301-304). The system transmits an AAL2 connection setup request message to a base station(31)(305), and reads AAL2 channel information of an AAL2 connection setup request message to assign resources, then performs an internal setup(306-308). The base station(31) transmits an AAL2 connection setup confirmation message to the RNC(32), and an ALCAP(Access Link Control Application Part)(322) of the RNC(32) transmits an AAL2 connection setup confirmation primitive to the upper application program(323)(309-311).
Patent KR-20030055412-A (KR)
Title: Apparatus and method for locating a mobile tranceiver
Inventor: KIM EUNG BAE
IPC: G01S5/12
Filed: 2001-12-26
Abstract: PURPOSE: A device for tracking a position of a mobile terminal and a method therefor are provided to vertically beam-form a beam forming antenna from distance and azimuth positions, and to measure up to an altitude angle of the mobile terminal, then to update distance, azimuth, and the altitude angle at certain time intervals, thereby exactly obtaining a 3-dimensional position of the mobile terminal. CONSTITUTION: A beamforming antenna(10) receives a signal from a mobile terminal. A distance measurer(110) measures distance between a wireless base station and the mobile terminal from the received signal. An azimuth measurer(130) measures an azimuth of the mobile terminal for the wireless base station through a beamforming scanning process in horizontal direction of the beamforming antenna(10). An altitude angle measurer(140) measures an altitude angle of the mobile terminal through a beamforming scanning process in vertical direction. A position determiner(150) operates the signals outputted from the azimuth measurer(130) and the altitude angle measurer(140), and determines a position of the mobile terminal, then updates the mobile terminal.
Patent KR-20020053758-A (KR)
Title: Zoom lens and optical apparatus using the same
Inventor: ITOH YOSHINORI
IPC: G02B15/177
Filed: 2001-12-27
Abstract: PURPOSE: A zoom lens and an optical apparatus using the same are provided to improve an optical performance and to reduce the number of lenses. CONSTITUTION: A second lens unit(L2) is composed of a first lens sub unit(L2a) of positive optical power and a second lens sub unit(L2b) of positive optical power, which are spaced apart from each other by an air gap largest in the second lens unit(L2). The second lens sub unit(L2b) is moved in the optical axis direction to effect focusing from an object at infinity to an object at a finite distance. The zoom lens has a first lens unit(L1) of negative optical power, the second lens unit(L2) of positive optical power, and a third lens unit(L3) of positive optical power arranged in that order from the object side, and the lens units are moved such that the distance between the first lens unit(L1) and the second lens unit(L2) is smaller and the distance between the second lens unit(L2) and the third lens unit(L3) is larger at the telephoto end than at the wide-angle end to thereby effect zooming.
Patent KR-20030056215-A (KR)
Title: salicide layer forming method of MOS device
Inventor: KIM HAK DONG
IPC: H01L21/24
Filed: 2001-12-27
Abstract: PURPOSE: A method for forming a salicide layer of an MOS(Metal Oxide Semiconductor) device is provided to be capable of reducing the resistance of the salicide layer by implanting germanium ions into a titanium layer in forming the titanium salicide. CONSTITUTION: After forming a gate electrode(6) made of a gate oxide layer(4) and a polysilicon layer on a silicon substrate(2), an LDD(Lightly Doped Drain) region is formed at both sides of the gate electrode in the silicon substrate by implanting ions. A spacer(18) is then formed at both sidewalls of the gate electrode. An ion implantation is carried out at the resultant structure for forming a source/drain region(10,12). A titanium layer is formed on the gate electrode, spacer, source/drain region by using a sputtering process. At this time, germanium ion implantation is carried out for restraining the growth of grains of titanium. A phase transition process is carried out for transforming a high resistive titanium salicide layer into a low resistive titanium salicide layer(16) by carrying out a two-step heat treatment at the resultant structure.
Patent KR-20030057151-A (KR)
Title: LAN emulator interface equipment for testing a LLC module
Inventor: HA GEUN HUI
IPC: H04L12/26
Filed: 2001-12-28
Abstract: PURPOSE: A LAN(Local Area Network) emulator interface device for testing an LLC(Logical Link Control) module is provided to virtually embody a LAN chip and a driver installed at a lower portion of the LLC module by combining a LAN emulator interface with the lower portion of the LLC module, sharing function information and an interface identifier, and emulating the LAN chip. CONSTITUTION: An LLC module(3) adds an LLC header to a communication signal outputted from a router module(2) of a transmission system(1), or transmits the communication signal. The LLC module(3) reads data from a lower equipment by a polling scheme. A LAN emulator interface unit(4) combined with a lower portion of the LLC module(3) interfaces the function of a LAN chip emulated in development test under SUN environment.
Patent KR-20030044739-A (KR)
Title: Structure of One body type Multilayer Polyester Fiber for Inner Construction Materials and Combined Structure of Installation Moldings.
Inventor: SON MAN HO
IPC: E04C2/26
Filed: 2001-12-20
Abstract: PURPOSE: A structure of interior finishing materials using multilayered polyester is provided to simplify construction progress, to reduce the load of a building, to improve workability and quality, to prevent the waste of resources by using eco-friendly and recyclable materials, to shorten a period of construction and to decrease construction expenses. CONSTITUTION: The structure of interior finishing materials using multilayered polyester comprises polyester hardboard(1) attached to both sides of the interior finishing materials to heighten soundproofing and sound-insulating effects, to keep high binding strength with an internal wall and to have stable finishing effects, polyester felt(2) keeping the thick web state having an air layer to have heat insulating effects, and a polyester skin layer(3) having excellent interior effects as wallpaper finishing materials.
Patent KR-20010079812-A (KR)
IPC: A01N43/08
Filed: 1999-08-17
Abstract: 살충제 조성물로서 사용하기 위한, 아세트산과, 말산, 시트르산 및 아스코브산 중 적어도 1종을 포함하는 수성 조성물. 조성물은 계면활성제, 비누 및/또는 프로필렌 글리콜을 함유할 수 있다.
Patent KR-20010075278-A (KR)
IPC: A22C29/04
Filed: 2000-07-21
Abstract: 조개의 처리방법은, 조개의 껍질의 내측에 액체를 분사하여 껍질과 살을 분리하여 껍질을 연다.  조개의 한쪽 껍질을 열고 나서 조개의 부수부를 개별적으로 또는 2종류이상 또는 전부를 모아서 흡인제거한다.  조개의 껍질의 일부에 개구부를 형성하고, 개구부로부터 조개의 부수부를 개별적으로, 또는 2종류이상 또는 전부를 모아서 흡인제거한다.  부수부의 흡인제거 후, 조개에 액체를 분사하여 다른 껍질과 살을 분리한다.  껍질의 일부를 절단공구로 절제하던지, 구멍을 뚫던지, 껍질을 가압하여 파손하여 껍질의 일부에 개구부를 형성한다.  껍질에 개구부를 형성함으로써 발생하는 껍질의 파편, 분말 등을 흡인하여 또는 액체로 씻어내어 제거한다.  개구부를 2매의 껍질의 한쪽 또는 양쪽에 형성한다.  조개처리장치는 이들의 처리방법을 실현하기 위해 부수부제거기구, 반송체, 개구기구, 제 1의 분리기구, 제 2의 분리기구를 갖추도록 하였다.
Patent KR-20010090794-A (KR)
IPC: H04L1/18
Filed: 2000-08-17
Abstract: 본 발명에 따른 방법은 제 1 세그먼트 데이터 블럭 및 제 2 세그먼트 데이터 블럭을 포함하는 데이터 프레임을 수신하는 단계를 포함한다. 더욱이, 본 방법은 또한 제 1 세그먼트 데이터 블럭 및 제 2 세그먼트 데이터 블럭이 손상된 데이터를 포함하는지 여부를 결정하는 결정하는 단계를 포함한다. 손상된 데이터를 포함하는 제 1 세그먼트 데이터 블럭 및 손상된 데이터를 포함하지 않는 제 2 세그먼트 데이터 블럭에 응답하여, 본 방법은 또한 제 2 데이터 블럭을 메모리내에 저장하는 단계를 포함한다. 아울러, 손상된 데이터를 포함하는 제 1 세그먼트 데이터 블럭에 응답하여, 본 방법은 데이터 프레임의 재전송을 요구하는 단계를 포함한다. 손상된 데이터를 포함하지 않는 제 1 세그먼트 데이터 블럭의 재전송을 수신한 것에 응답하여, 본 방법은 손상된 데이터를 포함하지 않는 제 1 세그먼트 데이터 블럭을 손상된 데이터를 포함하지 않는 제 2 세그먼트 데이터 블럭과 결합하는 단계를 포함한다.
Patent KR-20010080538-A (KR)
IPC: A63F13/533
Filed: 2000-09-29
Abstract: 본 발명은 게임화상 생성장치, 정보신호분배장치 및 정보기억매체에 관한 것으로서, 사용자가 키조작과 그 조작에 대한 응답을 정의할 수 있는 정보신호분배장치, 게임화상 생성장치 및 정보기억매체를 제공하기 위해 사용자가 조작과 응답과의 대응을 정의하는 정의화면에서 정의하는 것에 의해 휴대전화(200)에서 송신되는 신호분배요구정보를 수신하는 송수신부(190)와, 상기 신호분배요구정보에 포함되는 정의정보에 기초하여 기억부(120)에 기억된 사용자 데이터(122)를 갱신하는 제어부(112)와, 사용자 데이터(122)에 기초하여 게임화상을 생성하는 화상생성부(111)를 설정하고, 송수신부(190)에 의해 생성된 화상을 휴대전화(200)를 향해 송신하는 것을 특징으로 한다.
Patent KR-20010101081-A (KR)
IPC: H04L1/00
Filed: 1999-11-23
Abstract: 심볼-지향 에러 정정 방법을 사용하고, 단일 채널 에러에서 기인하는 에러와 함께 수신된 에러 정정 부호 심볼의 갯수를 줄임으로써, 에러 정정 능률을 향상시키기 위해 다중캐리어 통신에 이용될 수 있는 기술이 개시된다. 보다 상세하게는, 이 기술에서는 각각의 채널의 갯수를 최소화시키는 방식으로 심볼에서 나온 비트가 복수 개의 채널에 할당된다.
Patent KR-20010090871-A (KR)
IPC: D06M15/647
Filed: 1999-12-08
Abstract: 고 다분산성을 가진 친수성 계면활성제로 처리된 부직 웹은 다중 유체 인설트에 대해 또한 저장 중의 직물 에이징에 대해 내구성인 신속한 습윤성을 가진 직물이 된다.  처리된 부직포는 제한없이 흡수제 분야를 포함한 각종 분야에 이용될 수 있다.
Patent KR-20010089683-A (KR)
IPC: G01F23/26
Filed: 1999-12-22
Abstract: 본 발명은 특히 상하로 동작할 수 있어서 주형의 빈 공간 내로 장입될 수 있는 측정 부재를 구비하는 철강용 연속주조 설비를 위해 주형 내에 존재하는 용융 금속의 레벨을 탐지하고 제어하기 위한 방법 빛 장치에 관한 것으로, 용융 금속은 차단할 수 있는 바닥 개구부를 구비하는 공급 용기로부터 침전관을 통해 주형에 공급될 수 있다.  이때 레벨 측정 부재(42)는 제1 신호선(31)을 통해 컴퓨터(41)와 연결되고, 컴퓨터는 제1 제어선(51)을 통해 제1 액추에이터(61)과 연결되며, 제1 액추에이터에 고정된 연장 암(71)의 헤드 단부에 레벨 측정 부재(42)를 장착한다.  연장 암(71)에 구비되는 위치 센서(43)는 제2 신호선(32)을 통해 컴퓨터(41)와 연결되고, 컴퓨터는 제2 제어선(52)을 통해 제2 액추에이터(62)와 연결되며, 제2 액추에이터는 공급 용기(11)의 바닥 개구부(12)를 차단하기 위한 밀폐 장치(81)와 연결된다.
Patent KR-20010089705-A (KR)
Inventor: KIM NAM YEONG
IPC: E04B1/48
Filed: 1999-12-27
Abstract: PURPOSE: A method for jointing steel members using shear rings is provided to achieve a jointing construction to which a real shearing force can be applied, to improve working conditions, the jointing strength and durability, and to reduce material. CONSTITUTION: A construction for jointing steel members using shear rings has at least one first steel member and at least one second steel member overlapped together and respectively having at least a bolt hole and at least an annular groove, and at least one shear ring inserted in the annular groove of both the first steel member and the second steel member to prevent slip between the first steel member and the second steel member. The annular groove is formed at each of contact surfaces of the first steel member and the second steel member, and the bolt hole has a first clearance while the annular groove of at least one of the first steel member and the second steel member has a second clearance smaller than the first clearance. The second clearance allows a deformation or a displacement of the first steel member and the second steel member against an assembling force by the bolt and the nut until the bolt comes in contact with a side wall of the bolt hole.
Patent KR-20010102574-A (KR)
IPC: G11C11/401
Filed: 2000-03-10
Abstract: 본 발명에 따른 메모리는 동일하게 구성된 메모리 셀(MC) 및 기준 셀(RC)을 포함한다.  기준 셀(RC)이 제 1 스위칭 소자(S1)를 통해 판독 증폭기(SAi)로부터 분리되고, 기준 셀(RC)과 접속된 비트라인(BLi, bBLi)이 제 2 스위칭 소자(S2)를 통해 기준 정보를 유도하는 전위 라인(P1)과 도전 접속됨으로써, 기준 정보는 기준 셀(RC)로 입력된다.
Patent KR-20010112389-A (KR)
IPC: G11B11/105
Filed: 2000-03-29
Abstract: 자기 헤드 구동 회로(15)는 자기를 이용하여 기록 매체에 기록하기 위한 기록 신호를 수신하고, 상기 기록 신호에 기초하여 제어 신호를 생성하는 제어 회로 (20)와, 스위칭 FET(31∼34)를 사용하며, 상기 제어 회로로부터 수신한 제어 신호에 기초하여 자기 헤드(14)의 자계 코일(16)에 통전하는 전류의 방향을 전환하는 스위치 회로(30)를 포함하고 있다.  스위칭 FET로서 PchFET(31, 32) 및 NchFET(33, 34) 양쪽을 사용하고 있다. 
     스위칭 FET의 게이트 전압의 최대치는 자계 코일(16)에 흐르는 전류를 공급하는 코일 전원의 전압(Vd)보다 낮고, 또한 스위칭 FET의 게이트 임계치 전압보다 높아지도록 설정된다.
Patent KR-20020010682-A (KR)
IPC: H01L27/108
Filed: 2000-05-30
Abstract: 본 발명은 기판(200)에 트렌치(202)를 형성하는 단계, 수소로 종결된 실리콘 표면을 제공하기 위해 습식 에칭액으로 상기 표면을 에칭함으로써 상기 트렌치 내에 표면을 준비하는 단계 및 트렌치(202)를 확장하기 위해 상기 실리콘 표면을 이방성 습식 에칭하는 단계를 포함하는 트렌치(202)를 확장하는 방법에 관한 것이다.
Patent KR-20020035005-A (KR)
Title: Expandable fusion device and method
IPC: A61F2/44
Filed: 2000-06-22
Abstract: The present invention is directed to expandable bone fusion devices and methods of use. In general, a fusion device according to the invention includes a first member and a second member which can be deployed and locked into an expanded configuration to stabilize the adjacent bone during fusion of the bone.
Patent KR-20030061250-A (KR)
Title: Chair Having support department of waist
Inventor: KOO YONG SEO
IPC: A47C7/62
Filed: 2002-01-11
Abstract: PURPOSE: Provided is a chair including a waist support part which projects a waist support sheet to users' waist part when a back support part is moved backward so that it contributes to protect users' waist. CONSTITUTION: In the chair which attaches a back support board(1) to a chair frame wherein the back support board consists of a board part(10) and a back support part(11), with selecting inclination location or normal location, the chair including the waist support part is characterized by including the waist support part(3) which is composed of the waist support sheet(31) to be fixed at lower edge of the back support part; and a working connection part(32) to be fixed at upper edge of the waist support sheet at one edge and to be held at the chair frame at the other edge.
Patent KR-20030061635-A (KR)
Title: Porcelain Enamel Slip For Structural and Product Method of Porcelain Enamel Structural
Inventor: JEUN SEUNG MO
IPC: C03C8/12
Filed: 2002-01-15
Abstract: PURPOSE: An enamelware composition for a construction material for the interior decoration and a method for preparing a construction material by using the composition are provided, wherein the composition is applied to the outer surface of the construction material plated with aluminum for preventing the penetration of moisture or the deformation due to the rapid change of temperature. CONSTITUTION: The composition comprises the steps of mixing 29-35 wt% of silicon dioxide, 30-35 wt% of lead oxide(PbO2), 10-25 wt% of sodium oxide, 5-15 wt% of titanium dioxide, 0.2-1 wt% of antimony oxide and 0.2-1 wt% of boron oxide(3); melting the mixture(4); rapidly cooling the molten one to form frit(5); pulverizing the frit(6); mixing the pulverized frit with water in the ratio of 6:4; and adding 2-5 wt% of sodium silicate, 3-7 wt% of silica and 0.3-0.7 wt% of boric acid-methanol to the mixture and mixing them(7).
Patent KR-20030062051-A (KR)
Title: Controller for Food Pulveriser and Driving Method therefor
Inventor: KIM HWA YEONG
IPC: B02C25/00
Filed: 2002-01-16
Abstract: PURPOSE: Provided is a controller for a food crusher which detects current consumed at a motor periodically to stop the motor, when the quantity of current exceeds the assigned value so that it bars high current from being flown around the motor. CONSTITUTION: The controller for the food crusher comprises the parts of: a power supply part(310) which rectifies DC power from AC power and supplies DC power; a key input part(320) which generates a key signal to direct the drive of the motor(160); a CPU(330) which receives current value permitted from the motor to judge errors and stop the motor when high current is detected; a driving part(340) for the motor and solenoid valve which is connected to the CPU to rotate the motor and drive the solenoid valve(140) for spraying water; a current detection part(350) for the motor which is connected to the power supply to measure current permitted through the power supply and to transmit the appropriate current value to the CPU; and a working display part(360) which is connected to the CPU to see and hear current working state as signals permitted from the CPU.
Patent KR-20030062108-A (KR)
Title: A method for controlling traffic priority in ATM switching system and traffic managing buffer thereof
Inventor: KANG HYEON CHEOL
IPC: H04L12/28
Filed: 2002-01-16
Abstract: PURPOSE: A method for controlling a priority of a traffic in an ATM switching system and a traffic managing buffer using the same are provided to enhance an efficiency in using a buffer and performance of a network by improving a throughput of the buffer even for a cell with a low priority. CONSTITUTION: A main buffer(310) simultaneously receives a real time service cell and a non-real time service cell. Auxiliary buffers(S-1)(320)(S-2)(330) store a cell service 3, a non-real time service cell, and a cell service 4 transmitted according to a threshold values of the main buffer(310) and the auxiliary buffer(S-1)(320) and a threshold value of the auxiliary buffer(S-2)(330). A server(340) provides cell service. When the main buffer(310) is greater than an M-threshold value, a cell of a real time service of the main buffer(313) is discharged. If a non-real time cell of the main buffer has a high LP(Loss Priority), it is transmitted to the auxiliary buffer(S-1)(320), whereas if a non-real time cell has a low LP, it is transmitted to the auxiliary buffer(S-2)(330). The auxiliary buffer does not discharge a cell. If the main buffer(310) is smaller than the M-threshold value, a priority of a cell in a standby state for discharging in the main buffer(310) and a priority of a cell in a standby state for discharging in the auxiliary buffers(S-1)(320)(S-2)(330) are compared, and a cell of the auxiliary buffer(S-1)(320) and the auxiliary buffer(S-2)(330) is selectively provided.
Patent KR-20030063696-A (KR)
Title: Ground wave receiving apparatus and method for digital television
Inventor: PARK YEONG SANG
IPC: H04N5/46
Filed: 2002-01-23
Abstract: PURPOSE: An apparatus and a method for receiving ground wave of a digital broadcasting receiver are provided to simply change a channel without operating a complex operation of a remote control and remembering a ground wave retransmission channel. CONSTITUTION: An RF(Radio Frequency) input signal processing unit(100) demodulates analog and digital signals inputted through an RF input. An AV(Audio Visual) signal input sensing unit(110) senses an AV signal inputted through an AV input. An AV signal processing unit(120) processes audio and video signals inputted through the AV input. An MPEG(Moving Picture Experts Group) decoding/graphic overlay unit(130) overlays decoding and graphic signals of an MPEG signal.
Patent KR-20030065187-A (KR)
Title: Plasma display panel discharge gas
Inventor: CHOI SEONG CHEON
IPC: H01J17/22
Filed: 2002-01-31
Abstract: PURPOSE: A discharge gas is provided to achieve improved efficiency and color purity, while lengthening the useful life of the plasma display panel. CONSTITUTION: A plasma display panel comprises a discharge gas space formed by sealing first and second substrates which are arranged in parallel with each other; a discharge electrode mounted on the inner surface of at least one of the first and second substrates; and a phosphor layer excited by the visible light generated by the discharge of discharge gas. The discharge gas filling the discharge gas space contains xenon of 20 to 99%.
Patent KR-20030067412-A (KR)
Title: Apparatus for transmitting/receiving transport block size information in communication system using high speed downlink packet access scheme and method thereof
Inventor: CHOI SEONG HO
IPC: H04B7/26
Filed: 2002-02-08
Abstract: PURPOSE: A device for transceiving transport block size information in a communication system using an HSDPA(High Speed Downlink Packet Access) system is provided to multiplex channelizing code information, modulation system information, and a determined transport block size index assigned to a specific user terminal according to an HS-SCCH slot format, and to wirelessly transmit the information and the index, thereby enabling efficient communication. CONSTITUTION: An MAC-hs controller(2030) calculates a transport block size transmitted to a specific user terminal through a high-speed downlink physical shared channel at an optional transport section, with a modulation system and the number of channelizing codes assigned to the specific user terminal, and divides the transport block size into minimal transport block size preset in a mobile communication system, then determines a transport block size index. An HS-SCCH transmitter multiplexes channelizing code information, modulation system information, and the determined transport block size index according to an HS-SCCH slot format, and wirelessly transmits the information and the index.
Patent KR-20030068269-A (KR)
Title: Remote controlling method for programmable logic controller
Inventor: JANG HYEON U
IPC: G06F9/00
Filed: 2002-02-14
Abstract: PURPOSE: A method for remotely controlling a PLC(Programmable Logic Controller) is provided to remotely debug the PLC connecting to the PLC locally connected to a PADT(Programming And Debugging Tool) by using a communication function between PLCs. CONSTITUTION: The PLC locally connected to a debugging tool by a local instruction is converted into a client PLC(S107), and a remote PLC is converted into a server PLC. A remote instruction frame is transmitted to the server PLC through the client PLC(S109). A remote response frame of the server PLC for the remote instruction is transmitted to the debugging tool through the client PLC(S112).
Patent KR-20030068704-A (KR)
Title: color discriminating apparatus
Inventor: NA KYOUNG NAM
IPC: G01J5/60
Filed: 2002-02-16
Abstract: PURPOSE: A color discriminator is provided to precisely discriminate a color difference between samples and to precisely test and check a light source and a color temperature of the light source to be used. CONSTITUTION: A color discriminator includes an inclined plate(4) and an internal panel section(1). The internal panel section(1) has six illumination selecting parts. A liquid crystal window is formed at one side of the six illumination selecting parts in order to display a light display section and a color temperature display section. The six illumination selecting parts include a daylight selecting part, an office light selecting part, an incandescent selecting part, a store light selecting part, an Ultralume selecting part, and an ultraviolet selecting part. The color discriminator has a remote-controller for controlling a micro-controller installed in the color discriminator.
Patent KR-20030070384-A (KR)
Title: Surface acoustic wave filter
Inventor: KIM JU IL
IPC: H03H9/64
Filed: 2002-02-25
Abstract: PURPOSE: A surface acoustic wave filter is provided to reduce a loss of insertion and an attenuation characteristic of an input signal by using the first filter and the second filter. CONSTITUTION: A surface acoustic wave filter includes the first filter portion(40), the second filter portion(50), and a matching portion(60). The first filter reduces a loss of insertion in a filtering process of an external input signal. The second filter is operated together with the first filter. The second filter improves an attenuation characteristic of the input signal. The matching portion is installed between the first filter and the second filter in order to match the impedance of a filtered signal. The first and the second filter decides the loss of insertion and the attenuation characteristic according to an inter-digital transducer.