JPH09503294A - 補償手段付き容量センサ - Google Patents
補償手段付き容量センサInfo
- Publication number
- JPH09503294A JPH09503294A JP7509756A JP50975695A JPH09503294A JP H09503294 A JPH09503294 A JP H09503294A JP 7509756 A JP7509756 A JP 7509756A JP 50975695 A JP50975695 A JP 50975695A JP H09503294 A JPH09503294 A JP H09503294A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- capacitor
- circuit
- capacitance
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 239000004065 semiconductor Substances 0.000 claims description 9
- 238000009530 blood pressure measurement Methods 0.000 claims description 6
- 230000006870 function Effects 0.000 claims description 5
- 230000035807 sensation Effects 0.000 claims 1
- 239000000758 substrate Substances 0.000 description 18
- 230000000712 assembly Effects 0.000 description 6
- 238000000429 assembly Methods 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
- G01D5/241—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes
- G01D5/2417—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes by varying separation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/12—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in capacitance, i.e. electric circuits therefor
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.第1および第2のコンデンサ電極を有し、両電極間の容量が被感知パラメ ータの関数として変化し、かつ各コンデンサ電極が前記第1および第2のコンデ ンサ電極の回りに配置されたガード電極に関して浮遊容量を持つような感知用可 変コンデンサと、 基準電圧原と、 基準電圧に対して交互に変化する駆動電圧を、第1のコンデンサ電極に洪給す る駆動回路と、 基準電位に接続されて基準電圧に実質的に等しい仮想の基準電圧を発生する感 知回路と、 第2のコンデンサ電極に接続されて第2のコンデンサ電極を基準電位および仮 想基準電位に交互に接続し、第2コンデンサ電極とガード電極との間に実質的な 電位差が存在しないようにする切り替え回路とを具備した感知回路。 2.ガードが半導体材料で構成された請求項1記載の感知回路。 3.仮想基準電位は、積分コンデンサを介する負帰還回路を有する演算増幅器 である請求項1記載の感知回路。 4.感知されるパラメータは圧力である請求項1記載の感 知回路。 5.駆動電極および感知電極を有し、両電極間の容量が圧力の関数として変化 する感知用コンデンサと、 感知電極および浮游容量電極間の浮遊容量と、 浮遊容量電極に接続された基準電位と、 基準電位に接続されて基準電位に実質上等しい仮想基準電位出力を有し、その 出力が感知コンデンサの容量に関係する仮想基準回路と、 感知電極に接続されて感知電極上に保持された電荷を感知し、感知電極を浮遊 容量電極と実質上等しい電位に保持する電荷感知回路と、 感知された電荷に基づいて測定された圧力出力を与える出力回路とを具備し、 前記浮遊容量が感知されたコンデンサの測定から実質上除去されるようにした 、圧力の関数としての測定出力を発生する圧力測定回路。 6.浮遊容量電極が半導体材料で作られた請求項5記載の圧力測定回路。 7.仮想基準電位は、積分コンデンサを介する負帰還回路を具備した演算増幅 器である請求項5記載の圧力測定回路。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/126,364 US5424650A (en) | 1993-09-24 | 1993-09-24 | Capacitive pressure sensor having circuitry for eliminating stray capacitance |
US08/126,364 | 1993-09-24 | ||
PCT/US1994/009295 WO1995008752A2 (en) | 1993-09-24 | 1994-08-15 | Screened capacitive sensor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09503294A true JPH09503294A (ja) | 1997-03-31 |
JP3448060B2 JP3448060B2 (ja) | 2003-09-16 |
Family
ID=22424428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50975695A Expired - Fee Related JP3448060B2 (ja) | 1993-09-24 | 1994-08-15 | 補償手段付き容量センサ |
Country Status (9)
Country | Link |
---|---|
US (1) | US5424650A (ja) |
EP (1) | EP0740777B1 (ja) |
JP (1) | JP3448060B2 (ja) |
CN (1) | CN1131983A (ja) |
CA (1) | CA2169823A1 (ja) |
DE (1) | DE69423004T2 (ja) |
RU (1) | RU2144680C1 (ja) |
SG (1) | SG67884A1 (ja) |
WO (1) | WO1995008752A2 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001033330A (ja) * | 1999-07-26 | 2001-02-09 | Yamatake Corp | センサ信号処理回路 |
JP2003004564A (ja) * | 2001-06-27 | 2003-01-08 | Kyocera Corp | 圧力検出装置用パッケージ |
JP2018509620A (ja) * | 2015-03-13 | 2018-04-05 | ローズマウント インコーポレイテッド | 静電容量式センサの電極変位計測のための高分解能デルタシグマ変調器 |
Families Citing this family (62)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4205989C2 (de) * | 1992-02-27 | 1994-12-22 | Mannesmann Kienzle Gmbh | Schaltungsanordnung für einen Geber |
SG41962A1 (en) * | 1993-09-24 | 1997-08-15 | Rosemount Inc | Pressure transmitter isolation diaphragm |
US6026677A (en) * | 1993-10-01 | 2000-02-22 | Hysitron, Incorporated | Apparatus for microindentation hardness testing and surface imaging incorporating a multi-plate capacitor system |
US5661235A (en) * | 1993-10-01 | 1997-08-26 | Hysitron Incorporated | Multi-dimensional capacitive transducer |
DE4425164C2 (de) * | 1994-07-18 | 2002-05-16 | Ifm Electronic Gmbh | Kapazitiver Sensor |
US6484585B1 (en) | 1995-02-28 | 2002-11-26 | Rosemount Inc. | Pressure sensor for a pressure transmitter |
US5637802A (en) * | 1995-02-28 | 1997-06-10 | Rosemount Inc. | Capacitive pressure sensor for a pressure transmitted where electric field emanates substantially from back sides of plates |
US5731522A (en) * | 1997-03-14 | 1998-03-24 | Rosemount Inc. | Transmitter with isolation assembly for pressure sensor |
US5661240A (en) * | 1995-09-25 | 1997-08-26 | Ford Motor Company | Sampled-data interface circuit for capacitive sensors |
US5764891A (en) * | 1996-02-15 | 1998-06-09 | Rosemount Inc. | Process I/O to fieldbus interface circuit |
US5665899A (en) * | 1996-02-23 | 1997-09-09 | Rosemount Inc. | Pressure sensor diagnostics in a process transmitter |
DE19650681C2 (de) * | 1996-12-06 | 2001-08-16 | Zentr Mikroelekt Dresden Gmbh | Kapazitive Sensoranordnung |
JP3262013B2 (ja) * | 1997-02-24 | 2002-03-04 | 三菱電機株式会社 | 容量型センサインターフェース回路 |
DE19803643A1 (de) * | 1998-02-02 | 1999-08-05 | Reinhard Wiesemann | Kapazitiver Sensor |
US6156585A (en) * | 1998-02-02 | 2000-12-05 | Motorola, Inc. | Semiconductor component and method of manufacture |
JP3339563B2 (ja) * | 1998-06-09 | 2002-10-28 | 株式会社山武 | 静電容量式センサ |
US6825765B2 (en) * | 1998-12-30 | 2004-11-30 | Automotive Systems Laboratory, Inc. | Occupant detection system |
EP1059832A1 (en) * | 1999-06-09 | 2000-12-13 | Sony International (Europe) GmbH | Pressure transducing assembly |
DE19943618C1 (de) * | 1999-09-11 | 2001-05-31 | Bayerische Motoren Werke Ag | Kapazitiver Intrusionssensor und Sensorsystem mit einem solchen Sensor |
US6803755B2 (en) | 1999-09-21 | 2004-10-12 | Rockwell Automation Technologies, Inc. | Microelectromechanical system (MEMS) with improved beam suspension |
US6798312B1 (en) | 1999-09-21 | 2004-09-28 | Rockwell Automation Technologies, Inc. | Microelectromechanical system (MEMS) analog electrical isolator |
US6249075B1 (en) | 1999-11-18 | 2001-06-19 | Lucent Technologies Inc. | Surface micro-machined acoustic transducers |
US6366099B1 (en) * | 1999-12-21 | 2002-04-02 | Conrad Technologies, Inc. | Differential capacitance sampler |
US6520020B1 (en) | 2000-01-06 | 2003-02-18 | Rosemount Inc. | Method and apparatus for a direct bonded isolated pressure sensor |
US6508129B1 (en) | 2000-01-06 | 2003-01-21 | Rosemount Inc. | Pressure sensor capsule with improved isolation |
US6561038B2 (en) | 2000-01-06 | 2003-05-13 | Rosemount Inc. | Sensor with fluid isolation barrier |
US6505516B1 (en) | 2000-01-06 | 2003-01-14 | Rosemount Inc. | Capacitive pressure sensing with moving dielectric |
DE60108217T2 (de) | 2000-01-06 | 2005-12-29 | Rosemount Inc., Eden Prairie | Kornwachstumsverfahren zur herstellung einer elektrischen verbindung für mikroelektromechanische systeme (mems) |
US6486680B1 (en) * | 2000-06-13 | 2002-11-26 | The North American Manufacturing Company | Edge detector |
US6501282B1 (en) * | 2000-09-29 | 2002-12-31 | Rockwell Automation Technologies, Inc. | Highly sensitive capacitance comparison circuit |
US6756095B2 (en) | 2001-01-10 | 2004-06-29 | Avery Dennison Corporation | Heat-sealable laminate |
US6758000B2 (en) | 2001-01-10 | 2004-07-06 | Avery Dennison Corporation | Livestock security tag assembly |
EP1386173B1 (en) * | 2001-03-16 | 2004-10-27 | EILERSEN, Nils Aage Juul | Capacitance measuring circuit |
US6761829B2 (en) * | 2001-04-26 | 2004-07-13 | Rockwell Automation Technologies, Inc. | Method for fabricating an isolated microelectromechanical system (MEMS) device using an internal void |
US6756310B2 (en) | 2001-09-26 | 2004-06-29 | Rockwell Automation Technologies, Inc. | Method for constructing an isolate microelectromechanical system (MEMS) device using surface fabrication techniques |
US6768628B2 (en) | 2001-04-26 | 2004-07-27 | Rockwell Automation Technologies, Inc. | Method for fabricating an isolated microelectromechanical system (MEMS) device incorporating a wafer level cap |
US6794271B2 (en) * | 2001-09-28 | 2004-09-21 | Rockwell Automation Technologies, Inc. | Method for fabricating a microelectromechanical system (MEMS) device using a pre-patterned bridge |
US6815243B2 (en) | 2001-04-26 | 2004-11-09 | Rockwell Automation Technologies, Inc. | Method of fabricating a microelectromechanical system (MEMS) device using a pre-patterned substrate |
US6516672B2 (en) | 2001-05-21 | 2003-02-11 | Rosemount Inc. | Sigma-delta analog to digital converter for capacitive pressure sensor and process transmitter |
US6664786B2 (en) | 2001-07-30 | 2003-12-16 | Rockwell Automation Technologies, Inc. | Magnetic field sensor using microelectromechanical system |
DE10143034B4 (de) * | 2001-09-01 | 2004-11-11 | Infineon Technologies Ag | Vorrichtung zum Messen von Störkapazitäten auf einer integrierten Schaltung |
US6773653B2 (en) * | 2001-10-05 | 2004-08-10 | Avery Dennison Corporation | In-mold labeling method |
US6690178B2 (en) | 2001-10-26 | 2004-02-10 | Rockwell Automation Technologies, Inc. | On-board microelectromechanical system (MEMS) sensing device for power semiconductors |
US6848316B2 (en) * | 2002-05-08 | 2005-02-01 | Rosemount Inc. | Pressure sensor assembly |
US6716501B2 (en) | 2002-07-18 | 2004-04-06 | Avery Dennison Corporation | Multilayered film |
JP4109257B2 (ja) * | 2003-02-06 | 2008-07-02 | サウスウエスト・リサーチ・インスティチュート | 圧力感知マットを利用した仮想現実装置の移動インターフェース |
US6975193B2 (en) * | 2003-03-25 | 2005-12-13 | Rockwell Automation Technologies, Inc. | Microelectromechanical isolating circuit |
US6904476B2 (en) | 2003-04-04 | 2005-06-07 | Rosemount Inc. | Transmitter with dual protocol interface |
KR20060010734A (ko) * | 2003-05-01 | 2006-02-02 | 애버리 데니슨 코포레이션 | 다층 필름 |
JP4356003B2 (ja) * | 2003-09-30 | 2009-11-04 | アイシン精機株式会社 | 静電容量検出装置 |
JP2005140657A (ja) * | 2003-11-07 | 2005-06-02 | Denso Corp | 静電容量型センサの容量変化検出回路 |
JP3930862B2 (ja) * | 2004-02-13 | 2007-06-13 | 東京エレクトロン株式会社 | 容量型センサ |
CA2680043A1 (en) * | 2007-03-05 | 2008-09-12 | Arokia Nathan | Sensor pixels, arrays and array systems and methods therefor |
JP5496446B2 (ja) * | 2007-07-12 | 2014-05-21 | 東海ゴム工業株式会社 | 静電容量型センサ |
WO2012040211A2 (en) * | 2010-09-20 | 2012-03-29 | Fairchild Semiconductor Corporation | Microelectromechanical pressure sensor including reference capacitor |
DE102011078557A1 (de) * | 2011-07-01 | 2013-01-03 | Endress + Hauser Gmbh + Co. Kg | Verfahren zum Betreiben eines Absolut- oder Relativdrucksensors mit einem kapazitiven Wandler |
US8943895B2 (en) | 2012-09-07 | 2015-02-03 | Dynisco Instruments Llc | Capacitive pressure sensor |
US9103738B2 (en) | 2012-09-07 | 2015-08-11 | Dynisco Instruments Llc | Capacitive pressure sensor with intrinsic temperature compensation |
US8984952B2 (en) | 2012-09-07 | 2015-03-24 | Dynisco Instruments Llc | Capacitive pressure sensor |
US10107773B2 (en) * | 2012-10-29 | 2018-10-23 | MEMS-Vision International Inc. | Methods and systems for humidity and pressure sensor overlay integration with electronics |
CN104614583A (zh) * | 2015-02-11 | 2015-05-13 | 中国科学院空间科学与应用研究中心 | 一种悬浮电位监测系统 |
CN104828263B (zh) * | 2015-04-07 | 2018-02-13 | 中国科学院空间科学与应用研究中心 | 一种用于航天器表面带电效应的监测装置 |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3975719A (en) * | 1975-01-20 | 1976-08-17 | Rosemount Inc. | Transducer for converting a varying reactance signal to a DC current signal |
JPS5817421B2 (ja) * | 1979-02-02 | 1983-04-07 | 日産自動車株式会社 | 半導体圧力センサ |
CH652823A5 (de) * | 1980-03-26 | 1985-11-29 | Bosch Gmbh Robert | Weg-frequenz-messgroessenwandler. |
US4339750A (en) * | 1980-08-20 | 1982-07-13 | Rosemount Inc. | Low power transmitter |
DE3310643C2 (de) * | 1983-03-24 | 1986-04-10 | Karlheinz Dr. 7801 Schallstadt Ziegler | Drucksensor |
US4517622A (en) * | 1983-08-29 | 1985-05-14 | United Technologies Corporation | Capacitive pressure transducer signal conditioning circuit |
JPS6165114A (ja) * | 1984-09-06 | 1986-04-03 | Yokogawa Hokushin Electric Corp | 容量式変換装置 |
US4603371A (en) * | 1984-10-12 | 1986-07-29 | Rosemount Inc. | Capacitive sensing cell made of brittle material |
US4586108A (en) * | 1984-10-12 | 1986-04-29 | Rosemount Inc. | Circuit for capacitive sensor made of brittle material |
US5083091A (en) * | 1986-04-23 | 1992-01-21 | Rosemount, Inc. | Charged balanced feedback measurement circuit |
US4800758A (en) * | 1986-06-23 | 1989-01-31 | Rosemount Inc. | Pressure transducer with stress isolation for hard mounting |
US4833922A (en) * | 1987-06-01 | 1989-05-30 | Rosemount Inc. | Modular transmitter |
US4806783A (en) * | 1988-02-25 | 1989-02-21 | Transducer Technologies Inc. | Transducer circuit |
US5081867A (en) * | 1988-09-30 | 1992-01-21 | Nec Corporation | Semiconductor sensor |
US5022270A (en) * | 1989-06-15 | 1991-06-11 | Rosemount Inc. | Extended measurement capability transmitter having shared overpressure protection means |
DE4039006C1 (ja) * | 1990-12-06 | 1992-03-12 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De | |
US5094109A (en) * | 1990-12-06 | 1992-03-10 | Rosemount Inc. | Pressure transmitter with stress isolation depression |
US5178015A (en) * | 1991-07-22 | 1993-01-12 | Monolithic Sensors Inc. | Silicon-on-silicon differential input sensors |
US5329818A (en) * | 1992-05-28 | 1994-07-19 | Rosemount Inc. | Correction of a pressure indication in a pressure transducer due to variations of an environmental condition |
US5347867A (en) * | 1993-02-03 | 1994-09-20 | Minnetonka Warehouse Supply, Inc | Accelerometer incorporating a driven shield |
-
1993
- 1993-09-24 US US08/126,364 patent/US5424650A/en not_active Expired - Lifetime
-
1994
- 1994-08-15 EP EP94927178A patent/EP0740777B1/en not_active Expired - Lifetime
- 1994-08-15 DE DE69423004T patent/DE69423004T2/de not_active Expired - Lifetime
- 1994-08-15 JP JP50975695A patent/JP3448060B2/ja not_active Expired - Fee Related
- 1994-08-15 SG SG1996001663A patent/SG67884A1/en unknown
- 1994-08-15 RU RU96107790A patent/RU2144680C1/ru active
- 1994-08-15 CN CN94193515.9A patent/CN1131983A/zh active Pending
- 1994-08-15 CA CA002169823A patent/CA2169823A1/en not_active Abandoned
- 1994-08-15 WO PCT/US1994/009295 patent/WO1995008752A2/en active IP Right Grant
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001033330A (ja) * | 1999-07-26 | 2001-02-09 | Yamatake Corp | センサ信号処理回路 |
JP2003004564A (ja) * | 2001-06-27 | 2003-01-08 | Kyocera Corp | 圧力検出装置用パッケージ |
JP2018509620A (ja) * | 2015-03-13 | 2018-04-05 | ローズマウント インコーポレイテッド | 静電容量式センサの電極変位計測のための高分解能デルタシグマ変調器 |
Also Published As
Publication number | Publication date |
---|---|
CA2169823A1 (en) | 1995-03-30 |
JP3448060B2 (ja) | 2003-09-16 |
EP0740777A1 (en) | 1996-11-06 |
EP0740777B1 (en) | 2000-02-09 |
SG67884A1 (en) | 1999-10-19 |
CN1131983A (zh) | 1996-09-25 |
RU2144680C1 (ru) | 2000-01-20 |
US5424650A (en) | 1995-06-13 |
WO1995008752A2 (en) | 1995-03-30 |
DE69423004T2 (de) | 2000-09-14 |
DE69423004D1 (de) | 2000-03-16 |
WO1995008752A3 (en) | 1995-06-01 |
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