baber/WOPTO huggingface dataset:
Patent JP-2003181925-A (JP)
Title: Method for manufacturing olefinic resin lining pipe
Inventor: SUGAYA TAKEHISA
IPC: B29L23/00
Filed: 2001-12-20
Abstract: <P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an olefinic resin lining pipe capable of lining the inner surface of a metal pipe with a general-purpose olefinic resin within an extremely wide operation range, without restricting special blending or an operation range with respect to the olefinic resin being a resin deficient in shape memory properties.  <P>SOLUTION: The method for manufacturing the olefinic resin lining pipe comprises a first process for coating the outer surface of an olefinic resin pipe layer with an adhesive resin to form a lining two-layered raw pipe with a thickness of 0.5-3 mm and a tensile elastic modulus of 0.5-1.5 GPa, by extrusion molding when the inner surface of the metal pipe is lined with the olefinic resin pipe having no shape memory properties; a second process for folding the lining two-layered raw pipe obtained in the first process into a shape having a cross-sectional area smaller than that of the metal pipe to be lined, and inserting the folded lining two-layered raw pipe into the metal pipe; and a third process for applying pressure to the inner surface of the lining two-layered raw pipe at the ordinary temperature after the completion of insertion to closely bond the lining two-layered raw pipe to the inner surface of the metal pipe.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003198647-A (JP)
Title: Modulation signal generator
Inventor: TERADA HIROYUKI
IPC: H04L27/20
Filed: 2001-12-21
Abstract: <P>PROBLEM TO BE SOLVED: To provide a modulation signal generator capable of easily changing a switching frequency and a duty ratio by using a constitution of a DDS (Direct Digital Synthesis) generator when an FSK modulation, etc., are internally performed by a DDS type signal generator.  <P>SOLUTION: A first DDS generator is composed of a frequency register 1, a cumulative adder 2, an adding register 3, waveform memory 4, a D/A converter 5, and an LPF 6. An input of the cumulative adder is connected with a frequency selector 8 for switching an output value of the frequency register and an FSK frequency register 7 by a control signal having the predetermined switching frequency and the duty ratio. The control signal is generated by a digital comparator 22 after comparing a ramp wave shaped signal outputted from modulating-and-adding register 13 in a second DDS generator with a setting value of a duty setting register 21. A key rate of inner modulation is arbitrarily changeable as the duty ratio of control signal is changed by varying the setting value.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003190847-A (JP)
Title: Coating material feed apparatus
Inventor: NOMURA TAKAO
IPC: B05B7/26
Filed: 2001-12-21
Abstract: <P>PROBLEM TO BE SOLVED: To provide a small-sized, inexpensive and remarkably simply controllable coating material feed apparatus capable of uniformly mixing even a coating material such as a water based two component mixing type coating material in which a principal agent and a curing agent are hardly mixed with each other to feed it to a coater or a coating material tank.  <P>SOLUTION: In the coating material feed apparatus for feeding the coating material prepared by mixing ≥2 kinds of coating material components in a prescribed ratio to the coating material tank (2) mounted in the coater, each coating material component is uniformly distributed by separately and simultaneously pushing out each coating material component in the quantity corresponding to the mixing ratio by a measuring cylinder (4), filling the coating material components preliminarily mixed in a line mixing type preliminary mixer (5) into a force-feeding cylinder (6) and passing the coating material through a jetting type distribution mixer (7) when the coating material is forcibly fed to the coating material tank (2) by the force-feeding cylinder (6) to form the coating material into a jet stream by the fluid pressure.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2002270932-A (JP)
Title: Waveguide amplifier and pumping scheme therefor
Inventor: ROY FABIEN
IPC: H04B10/291
Filed: 2001-12-25
Abstract: PROBLEM TO BE SOLVED: To provide a waveguide amplifier and a pumping scheme for the waveguide amplifier. SOLUTION: The waveguide amplifier is provided with an input for optical signals and an output for optical signals having at least one piece of an amplifying waveguide provided with at least one means for coupling pumping laser modules to the amplifying waveguide containing TM ions. The pumping scheme for the waveguide amplifier feeds two different wavelengths into the waveguide.
Patent JP-2003194266-A (JP)
Title: Spiral corrugated tube and connecting method therefor
Inventor: HIRUKAWA KENJI
IPC: H02G1/06
Filed: 2001-12-25
Abstract: <P>PROBLEM TO BE SOLVED: To provide a spiral corrugated tube and a connecting method therefor, enabling tube connection without a fear of a water leak even when displacement is generated in a connecting portion of a buried tube due to uneven settlement and the like.  <P>SOLUTION: A corrugated tube comprising a water expansion rubber sponge block 3 having a shape same as a trough portion, and a water expansion sponge rubber sheet 4 connecting to the water expansion rubber sponge block 3 and having a length same as a circumference of a crest portion 1 is used in connecting tube both end portions of a spiral corrugated tube.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003198935-A (JP)
Title: Picture signal processing device
Inventor: KUSUHARA TAKASHI
IPC: H04N19/102
Filed: 2001-12-25
Abstract: <P>PROBLEM TO BE SOLVED: To obtain a picture signal processing device which can correctly discriminate appearance rules of still picture fields and moving picture fields by accurately calculating a motion vector threshold and a statistical processing threshold.  <P>SOLUTION: The motion vector quantity of a noticed pixel is detected by a motion vector detection part 2, and a threshold for discriminating whether the noticed pixel is a moving picture or not is generated by a tentative statistical processing threshold generation part 3, and the vector quantity is compared with the threshold, and a counter is counted up in the case of a moving picture. The value of the counter is compared with a plurality of preliminarily defined thresholds for statistical processing to discriminate a still picture or moving picture field, and thus the appearance rules of still picture and moving picture fields are detected. A plurality appearance rule candidates can be defined in a memory 9, and appearance rules and retrieval precedence or the like of still picture and moving picture fields can be stored in the memory 9, and the appearance rules defined in the memory 9 are read to calculate matching rates and the highest matching rate can be preserved in the memory 9.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003198756-A (JP)
Title: Information processor with dial-up restricting function
Inventor: SHIMADA KENICHI
IPC: H04M11/00
Filed: 2001-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To increase security and to reduce management man-hour and expenditure, etc., by preventing illegal access which is of no concern to conducting a job.  <P>SOLUTION: A terminal 1 includes a telephone number check part 1b, obtains a data stream transmitted from a Com port 1c when performing access to an access point by dial-up and compares a telephone number obtained from the data stream with the telephone number which is previously registered in a telephone number register book 1d. When the telephone number which is not registered in the register book is detected, an alarm message is displayed in the display part of the terminal equipment 1. At the same time the Com port is temporarily closed by a telephone number detecting program and the access is restricted. Besides it is reported that access is illegally performed to the server 2 of an operation manager by a mail, etc., via a modem.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003198426-A (JP)
Title: Adaptive modulation radio communication device
Inventor: KONDO MITSUHARU
IPC: H04W28/18
Filed: 2001-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide an adaptive modulation radio communication device in which a received quality can be improved by taking into account fading fluctuation when using the estimated value of a maximum Doppler frequency.  <P>SOLUTION: In modulation multilevel number control parts 53 and 63, the estimated value of a maximum Doppler frequency fd is inputted to a comparison part 72. When the value is equal to or lower than a prescribed threshold Th<SB>1</SB>, an adaptive modulation system is adopted according to a first modulation parameter selection chart 83. When the value exceeds the prescribed threshold Th<SB>1</SB>but is equal to or lower than a prescribed threshold Th<SB>2</SB>, an adaptive modulation system according to a third modulation parameter selection chart 83 is adopted. In this third modulation parameter selection chart 83, a modulation multilevel number is lowered for one stage in order to improve the transmission quality in comparison with the first modulation parameter selection chart 73. When the estimated value of the maximum Doppler frequency fd exceeds the prescribed threshold Th<SB>2</SB>, a QPSK modulation system having the minimum modulation multilevel number is used.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003193561-A (JP)
Title: Aseismic wooden building and aseismic reinforcement method
Inventor: IZUMISAWA TADAHARU
IPC: E04B1/26
Filed: 2001-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To improve aseismic performance of a wooden building at a low cost.  <P>SOLUTION: When four corner angles of the wooden building are reinforced exclusively, the aseismic performance of the building can be improved as a whole. In the four corners of the wooden building, when aseismic elements having structural plywood arranged on both sides is installed to a frame material for a two-by-four construction method and the like, final yield strength of the building can be improved greatly, and the building can resist application of a horizontal shock due to a great earthquake. Since the aseismic performance can be improved only by the aseismic elements arranged in the four corners alone or arranged only to the middle of the eaves height, material costs can be lowered and low-cost construction can be realized. Since the aseismic elements are added to the four corners, designing processing can be facilitated, and the aseismic element may be used as an accent of the building appearance.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003193004-A (JP)
Title: Adhesive tape for forming plastic lens
Inventor: MOCHIZUKI MASAO
IPC: C09J7/02
Filed: 2001-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide an adhesive tape for forming a plastic lens, having a silicone-based adhesive agent layer, capable of producing a good quality plastic lens without having an optical distortion in a good efficiency.  <P>SOLUTION: This adhesive tape for forming the plastic lens is characterized by having an adhesive layer consisting of a silicone adhesive component containing a silane coupling agent component containing 2 or 3 alkoxyl groups and a polyorganosiloxane having hydroxy group at its terminal, on one side surface of a base substrate.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003198828-A (JP)
Title: Facsimile transmitter and receiver
Inventor: TAKEDA SHUNSUKE
IPC: H04N1/387
Filed: 2001-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide a facsimile transmitter and receiver that easily and quickly automates processing of information transmitted/received by a facsimile document so as to realize information communication by efficient facsimile transmission/reception.  <P>SOLUTION: In a FAX information database FDB in a FAX information processing apparatus 30 in a FAX management server 3 at companies XX side, an attached image to be attached to a received facsimile image from companies AA, BB, CC is registered in advance, when information expressed on a received facsimile document from the company AA or the like is provided to a user customer aa or bb, the FAX management server 3 attaches the attached image registered to the received facsimile image and faxes the resulting image. Further, the FAX management server 3 registers information such as nomenclatures and names, transmission/reception states of facsimile, the attached images, received facsimile images and transmission facsimile images to the FAX information database FDB to manage them in a unified way so that a computer terminal 40 or the like in a company XX use LAN 4 can properly refer to the database FDB.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003200380-A (JP)
Title: Slitting device
Inventor: FUJIKATA SHINGO
IPC: B26D1/24
Filed: 2001-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide a slitting device capable of cutting web into tape by restricting fluctuation in width and runout in a width direction.  <P>SOLUTION: A body section 1 which has a cutting blade 3 for cutting broad web into a plurality of narrow tape and a carrying roller 4 for carrying the web to be cut by the cutting blade 3, and a drive section 2 for driving the cutting blade 3 and the carrying roller 4 are formed separately and are arranged spacing from each other.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003193563-A (JP)
Title: Aseismic removable reinforcing metal fitting
Inventor: MINAKAWA KIYOTO
IPC: E04B1/58
Filed: 2001-12-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide an aseismic removable reinforcing metal fitting applicable to a completed house and capable of ensuring reinforcement in a short time.  <P>SOLUTION: This aseismic removable reinforcing metal fitting connecting a first long member 2 arranged substantially vertically and a second long member 3 connected to the first long member 2 directly or via another member to each other is provided with a first flat plate member 4 fixed to the side face of the first long member 2 and provided with a first vertical hole part 12, a second flat plate member 5 arranged substantially flush with the first flat plate member 4 or arranged in the plane crossing the plane of the first flat plate member 4 orthogonally and fixed to the side face of the second long member 3 to be arranged in the substantially same axial center to the first vertical hole part 12 in the first flat plate member 4, and a rod type connection member passed through the first vertical hole part 12 and the second vertical hole part 15 for loosely connecting the first flat plate member 4 and the second flat plate member 5 together.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003189712-A (JP)
Title: Transplanting machine
Inventor: FUNO TAKASHI
IPC: A01C11/02
Filed: 2001-12-28
Abstract: <P>PROBLEM TO BE SOLVED: To provide a transplanting machine capable of solving such troubles that a position at which a planting mechanism changes its speed is fluctuated according to change of an intrarow speed and a seedling table is traversed at a nonuniformed speed so that vibrations are caused, when transplantation is carried out by using an unequally speed changing mechanism interposed in a planting power transmitting path.  <P>SOLUTION: This transplanting machine has a planting mechanism 18 for clawing seedlings off from the seedling table 15 and transplanting them to a farm field, an intrarow speed changing mechanism 9 for changing a relative operation speed of the planting mechanism 18 to a traveling speed of the machine, and a seedling table traversing mechanism (composed of a traversing transmission case 34 and a seedling table traversing shaft 35) for traversing the seedling table by being synchronized with a planting operation of the planting mechanism 18, wherein an unequally speed changing mechanism 36 is interposed between an upstream area of the planting mechanism 18 and a downstream area of the intrarow speed changing mechanism 9 and the seedling table traversing mechanism, when the unequally speed changing mechanism 36 for making the working speed of the planting mechanism 18 changed into a specified value is interposed in the power transmitting path of the planting mechanism 18.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003193742-A (JP)
Title: Stop device for door closer
Inventor: ISHIDA KOJI
IPC: E05F3/22
Filed: 2001-12-28
Abstract: <P>PROBLEM TO BE SOLVED: To provide a stop device for a door closer that can facilitate an assembly process by reducing the number of parts in comparison with conventional constitution and to obtain a stable click sensation.  <P>SOLUTION: This stop device for the door closer is provided with an operating member manually operated into a prescribed operation completion position to maintain an engaged state after engaging serrations by moving a fixed member in the rotation axis direction of both door closer parts, and an abutting member which abuts on the operating member when the operating member is operated. An elastic part elastically deformed by abutting on the abutting member when the operating member is operated into the operation completion position, is integrally formed at the operating member by molding or machining. The elastic part changes the degree of the elastic deformation when the operating member reaches the operation completion position so that the arrival of the operating member into the operation completion position is recognized by an operator.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2007131013-A (JP)
Title: Movable type dashboard
Inventor: KAIGA AKIRA
IPC: B60R7/06
Filed: 2001-12-03
Abstract: <P>PROBLEM TO BE SOLVED: To enjoy a comfortable drive by putting the feet on a dashboard by arbitrarily changing the height of the dashboard before a front passenger seat of an automobile.  <P>SOLUTION: In this dashboard 1, the dashboard 1 on the front passenger seat side of the automobile is separated from the dashboard 1 on a driver's seat side. A slide rail 3 is provided in the dashboard 1 on the front passenger seat to vertically move the dashboard 1 itself. The dashboard 1 is fixed at an arbitrary position by operating a fixed pin by a lever 2 provided in the dashboard 1.  <P>COPYRIGHT: (C)2007,JPO&INPIT
Patent JP-2003502264-A (JP)
IPC: C01B13/34
Filed: 2000-06-14
Abstract: The invention relates to an improved spray pyrolysis or spray drying method for the production of inorganic oxides and mixed oxides or powder materials and to a facility for implementing said method.
Patent JP-2003503468-A (JP)
Title: 水素移動型不斉還元による（ｒ）−１−（３，５−ビス（トリフルオロメチル）フェニル）エタン−１−オールの合成方法
IPC: C07C29/74
Filed: 2000-06-27
Abstract: (57)【要約】
本発明は、アルコールの存在下、ロジウムまたはルテニウム触媒および配位子を用いた、３，５−ビス（トリフルオロメチル）アセトフェノンの水素移動型不斉還元によって、（Ｒ）−１−（３，５−ビス（トリフルオロメチル）フェニル）エタノールを調製する方法に関する。また、（Ｓ，Ｒ）−１−アミノ−２−ヒドロキシインダンとロジウムおよびルテニウムの特定の錯体、ならびに（Ｒ）−１−（３，５−ビス（トリフルオロメチル）フェニル）エタノールを、これと１，４−ジアザビシクロ［２．２．２］オクタンとの錯体、および（Ｒ）−１−（３，５−ビス（トリフルオロメチル）フェニル）エタノールと１，４−ジアザビシクロ［２．２．２］オクタンとの２：１の錯体を用いて精製する方法も特許請求されている。
Patent JP-2003532625-A (JP)
Title: ストレプトグラミン誘導体、それらの製造およびそれらを含有する組成物
IPC: C07K7/06
Filed: 2000-07-26
Abstract: (57)【要約】
本発明は、一般式（Ｉ）［式中、Ｒ、Ｒ１、Ｒａ、Ｒｂ、ＲｃおよびＲｄは記述に示される目的の範囲を有する］の群Ｂのストレプトグラミンの誘導体に関する。前記誘導体は、場合によっては最低１種の群Ａのストレプトグラミン誘導体と組み合わせられる抗菌剤としての使用にとりわけ適する。
【化１】
Patent JP-2003507019-A (JP)
Title: 除草剤寛容性プロトポルフィリノーゲン・オキシダーゼ
IPC: C12N5/10
Filed: 2000-06-30
Abstract: (57)【要約】
本発明は、大豆、小麦、綿花、テンサイ、セイヨウアブラナ、イネ、ソルガム及びサトウキビからのプロトポルフィリノーゲンオキシダーゼ（プロトックス）酵素についてコードする新規のＤＮＡ配列を提供する。さらに、本発明は、除草剤寛容性をもつ修飾された形態のプロトックス酵素を教示している。本書で教示されている除草剤寛容性あるプロトックス酵素を発現する植物も同様に提供されている。これらの植物は、耐性形態への未変性プロトックス遺伝子の突然変異を介してプロトックス阻害物質に対する耐性を得るように工学処理することもできるし、或いは又、除草剤寛容性形態の植物プロトックス酵素をコードする遺伝子を用いて形質転換させることもできる。
Patent JP-2003507913-A (JP)
Title: Ｍビットｐｃｍサンプルを有するディジタル情報信号の伝送
IPC: H04J3/00
Filed: 2000-07-24
Abstract: (57)【要約】
伝送媒体を介してＭビットＰＣＭサンプルを有するディジタル情報信号を伝送するための送信器が開示されている。このＭビットＰＣＭ信号は、ＰビットＰＣＭ信号と差信号に分割（８）される（Ｐ＞Ｍ）。ＰビットＰＣＭ信号は、ＭビットＰＣＭディジタル情報信号の低品質再生信号であり、差信号は、ＭビットＰＣＭ信号からＰビットＰＣＭ信号を減じることにより得られる。差信号は、データ圧縮（１６）され、データ圧縮差信号が得られる。ＰビットＰＣＭ信号とデータ圧縮差信号は合成（２４）されて伝送信号が得られる。この伝送信号は伝送媒体（ＴＲＭ）を介して伝送される。
Patent JP-2003507607-A (JP)
Title: とくに車両用の外側ドアハンドル
IPC: E05B85/18
Filed: 2000-08-09
Abstract: (57)【要約】
ドアハンドルにおいて、ドアの表側に配置されたハンドル及びそのために使われかつドアの裏側に取付けられた支持体（１０）が存在する。ハンドルは、その両方のハンドル端部にある接続部によってドアにおける切り欠きを通って延びており、その際、一方のハンドル端部は、揺動可能な支持体（１０）に支持されたレバー（１３’）に接続されている。ハンドルに並べて支持体（１０）内にハウジングが差込まれ、このハウジングは、閉鎖シリンダを有することができる。ハンドルの取付けの際の取扱いを容易にするために、支持体（１０）とレバー（１３’）との間に保持要素（２５）を配置することが提案され、この保持要素は、レバーを定義された外側揺動位置に固定保持するために、通常その有効な保持位置にある。この外側揺動位置において、快適にレバーにハンドルを接続することが可能である。しかし支持体内にハウジングを差込むことによって、この保持要素（２５）は、その無効な位置に移され、ここにおいてレバー（１３’）を再び釈放する。
Patent JP-2003508063-A (JP)
Title: オリゴヌクレオチド三リン酸構築ブロックを用いた鋳型依存核酸重合化
IPC: C12Q1/68
Filed: 2000-08-29
Abstract: (57)【要約】
鋳型依存ポリメラーゼの新規使用。本新規使用は、鋳型依存的様式にて、未完成オリゴヌクレオチド−３’−ＯＨ上に少なくとも１つのオリゴヌクレオチド三リン酸を組み込むために、鋳型依存ポリメラーゼを使用することで実施される。
Patent JP-2003509698-A (JP)
IPC: G04B33/00
Filed: 2000-03-09
Abstract: Watch movement with hand display, comprising mobile elements ( 44, 42 ), designed to receive the hour ( 16 ) and minute ( 20 ) hands indicating current time, mounted pivoting to pivot about a first axis (A-A) arranged substantially at the center of the movement and four mobile elements ( 58 b , 60 b , 64 b , 62 b) designed to receive hands displaying complementary functions. According to the invention, the four mobile elements ( 58 b , 60 b , 64 b , 62 b) are mounted pivoting on the movement about second (B-B), third (C-C), fourth (ND) and fifth (E-E) axes arranged on a straight line (X-X) perpendicular to them.
Patent JP-2003516315-A (JP)
Title: 筋肉の痙攣及び筋肉痛を予防するためのリボースの利用
IPC: A23L2/52
Filed: 2000-09-22
Abstract: (57)【要約】
運動前のリボースの投与は運動誘導筋肉痙攣及び痛みを抑制又は予防する。運動の前及び直後の双方で摂取するリボースは運動誘導筋肉痙攣及び痛みを更に抑制又は予防する。
Patent JP-2003510322-A (JP)
Title: 再取り込みインヒビターとしてのピペリジン誘導体
IPC: A61P15/10
Filed: 2000-09-14
Abstract: (57)【要約】
本発明は、式（Ｉ）：
【化１０４】
 の化合物、およびセロトニンの再取り込みを阻害してセロトニン受容体に拮抗する方法を提供するものであって、該方法はそれらの処置が必要な被験者に有効な量の式（Ｉ）の化合物を投与することを含む。
Patent JP-2003511338-A (JP)
IPC: C01B33/027
Filed: 2000-09-28
Abstract: The invention relates to a method for producing highly pure, granular silicone by decomposing a gas containing silicone, especially a silane, in a pressure range of 100 to 900 mbar. Up to 50 vol. % of a silicone-free gas can be added, in relation to the quantity of gas supplied overall.
Patent JP-2003514475-A (JP)
Title: 論理特徴付けビヒクルを使用した製品歩留り予測のためのシステムおよび方法
IPC: H03K19/00
Filed: 2000-11-17
Abstract: (57)【要約】
少なくとも１つの組合せ論理回路エレメントと、組合せ論理回路エレメントを制御する制御回路とを備えた特徴付けビヒクルである。制御回路は、試験パターンの信号を組合せ論理回路エレメントに入力するための入力機構を備えている。出力機構は、試験パターンに基づいて組合せ論理回路エレメントによって出力される出力パターンを記憶している。リング・バスは、出力手段を入力手段に接続し、発振させている。カウンタが発振周波数をカウントし、それにより組合せ論理回路エレメントの性能が測定される。
Patent JP-2003514505-A (JP)
IPC: H02K29/00
Filed: 2000-11-16
Abstract: A variable motor (1) having reduced audible noise. This advantage is achieved by reducing or eliminating ripple torque by making the individual phase torques follow a certain profile, so that when the torques are summed, they are substantially constant. Therefore, the motor (1) back EMF is used as a reference waveform to control the winding currents to achieve reduced ripple torque. The back EMF reference is amplified and provided to the motor windings, and may be derived in a number of ways including use of sense windings, electronic derivation, and approximation by sensing the voltage applied to the windings.
Patent JP-2003524950-A (JP)
IPC: H03H7/21
Filed: 2000-11-29
Abstract: An image reject circuit comprises a local oscillator 26 for producing a local oscillator signal. A tunable phase shifting network 29 has inputs 1, 3 for receiving the local oscillator signal and producing an output in-phase (I) signal 13, 25 and an output quadrature (Q) signal 15, 27. A first amplitude detector 33 determines the amplitude of the output I signal, while a second amplitude detector 35 determines the amplitude of the output Q signal. A comparator 37 determines the difference between the amplitudes of the output I and Q signals, to produce a tuning signal for tuning the phase shifting network 29 to bring the difference between the amplitudes of the output I and Q signals towards a desired level. Preferably, the tunable phase shifting network 29 (shown in FIG. 4) comprises a combination of tunable capacitive, resistive and inductive elements.