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Sigma-delta analog to digital converter for capacitive pressure sensor and process transmitter 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G01L-009/12
출원번호 US-0862762 (2001-05-21)
발명자 / 주소
  • Wang, Rongtai
출원인 / 주소
  • Rosemount Inc.
대리인 / 주소
    Westman, Champlin & Kelly, P.A.
인용정보 피인용 횟수 : 27  인용 특허 : 198

초록 ▼

A pressure transmitter includes a pressure sensor comprising a pressure cell having an interior to form a main cell cavity and a deflectable diaphragm which deflects in response to an applied pressure. The pressure sensor includes electrodes to compensate for hysteresis. A charge inverter amplifier

대표청구항 ▼

A pressure transmitter includes a pressure sensor comprising a pressure cell having an interior to form a main cell cavity and a deflectable diaphragm which deflects in response to an applied pressure. The pressure sensor includes electrodes to compensate for hysteresis. A charge inverter amplifier

이 특허에 인용된 특허 (198)

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  133. Bodin Joel John, Pressure transducer with flame arrester.
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  137. Hedtke Robert C. (Hamburg MN), Pressure transmitter housing.
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  139. Lee David W. (Farmington MN), Pressure transmitter housing.
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  144. Tivy Vincent V. (Chagrin Falls OH), Process control system prover.
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  145. Frick Roger L. ; Tewfik Ahmed H. ; Schulte John P., Process control transmitter.
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  148. Sundet Paul C. ; Krueger William B., Process instrument mount.
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  149. Frick Roger L. ; Rud Jr. Stanley E. ; Broden David A., Process pressure measurement devices with improved error compensation.
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  150. Longsdorf Randy J. ; Edwards Grant B. ; Nelson Richard L. ; Pederson David L., Process transmitter communication circuit.
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  151. Bodin Joel J. (New Hope MN) Huisenga Garrie D. (Plymouth MN) Johnson Theodore L. (St. Louis MN) Rauth William C. (Bloomington MN), Process transmitter with inner conductive cover for EMI shielding.
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  152. Bayer Stephen J. (Fitzwatertown PA) Olsen Arthur M. (Pennsburg PA), Process variable transmitter having a non-interacting operating range adjustment.
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  153. Lee Chen Y. (Troy MI), Quad-gate demodulator circuit for capacitive transducers.
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  154. Ruesch, James R.; Frick, Roger L.; Grindheim, Earl A., Reactance measurement circuit.
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  155. Alden Jerome S. (Aurora OH) Budan Victor J. (Eastlake OH) Thompson Harold W. (N. Madison OH), Removable magnetic zero/span actuator for a transmitter.
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  156. Daniels, James W.; Hansen, Karl A., Self cleaning liquid level detector.
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  157. Wagner William B. (P.O. Box 1217 Greenwich CT 06836-1217), Self-contained digital electronic force gage with interchangeable force sensor modules.
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  158. Fossum Steven C. (Hopkins MN) Sedivy J. Gregory (Prior Lake MN) Savick Wayne K. (Eden Prairie MN), Self-zeroing pressure signal generator.
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  159. Kato Yukihiro (Kariya JPX) Kawasaki Eishi (Kariya JPX) Mizukoshi Masahito (Nagoya JPX), Semiconductor pressure sensor.
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  160. Ichikawa Norio (Mito JPX) Takeda Seijiro (Toukai JPX) Tsuruoka Kazuhiro (Katsuta JPX), Semiconductor pressure transducer.
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  161. Sitte Hans J. (Freeport IL), Sensor actuator bus system.
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  162. Boudreau Paul ; Jarva Curt, Sensor assembly.
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  163. Delatorre ; Leroy C., Single channel electrical comparative measuring system.
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  164. Smith George E. (Houston TX), Specific gravity independent gauging of liquid filled tanks.
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  165. Krouth Terrance F. (Eden Prairie MN) Zweber Michael J. (New Praque MN), Spring loaded resin seal.
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  166. Obermeier Horst (Huellhorst CA DEX) Ahmed Saleh U. (Northridge CA), Stable capacitive pressure transducer system.
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  167. Nelson Richard L. ; Kielb John A., Start up circuit for DC powered field instrument.
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  168. Frick Roger L. (Hackensack MN), Suspended diaphragm pressure sensor.
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  169. Senderowicz Daniel (Berkeley CA), Switched capacitor filter utilizing a differential input and output circuit and method.
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  170. Sasaki, Itsuo, Switched capacitor integrator.
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  171. Lee Chen Y. (Fort Wayne IN), Switched capacitor transducer.
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  172. Meisenheimer ; Jr. Daniel T. (Orange CT), Temperature compensatible pressure monitor and sensor construction.
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  173. Price Timothy D. (Chichester GB2), Temperature transmitter.
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  174. Price Timothy D. (Chichester GB2) Freeman Paul A. (Bognor Regis GB2), Temperature transmitter housing.
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  175. Selg Donald W. (Mendota Heights MN), Temperature transmitter housing.
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  176. Schwartz Bradley N. (Lakeville MN) Kugler Stanley (Golden Valley MN) Selg Donald W. (Mendota Heights MN), Temperature transmitter with integral secondary seal.
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  177. Cartwright Richard G. (Hertfordshire GB3), Terminal housing for industrial thermometer.
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  178. Piesche Helfried (Owingen DT), Thermal conductivity detector circuit.
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  179. Anderson Stephen D. (Minneapolis MN) Frick Roger L. (Hackensack MN) Monzo Glen E. (Minneapolis MN) Westfield Brian L. (Eden Prairie MN), Three wire low power transmitter.
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  180. Kienzler Rainer (Reutlingen DEX) Fleischer Ulrich (Pliezhausen DEX) Elbracht Berthold (Reutlingen DEX), Transmitter end stage.
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  181. Louwagie Bennett L. (Plymouth MN) Munson Gregory S. (Apple Valley MN) Wiklund David E. (Eden Prairie MN) Zweber Michael J. (New Prague MN) Broden David A. (Chanhassen MN) Bischoff Brian J. (Chaska MN, Transmitter having input for receiving a process variable from a remote sensor.
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  182. Gaboury Michael ; Harjani Ramesh, Transmitter with improved analog to digital converter.
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  183. Warrior Jogesh (Chanhassen MN) Brigham Scott E. (St. Paul MN) Lenz Gary A. (Eden Prairie MN), Transmitter with improved compensation.
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  184. Orth Kelly M. (Apple Valley MN) Quist Steven M. (Minnetonka MN) Frick Roger L. (Chanhassen MN) Paschke Randy K. (Chaska MN), Transmitter with internal serial bus.
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  185. Johnson John D. (St. Paul MN) Kirkpatrick William R. (Faribault MN), Transmitter with moisture draining housing and improved method of mounting RFI filters.
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  186. Frick Roger L. (Chanhassen MN) Schulte John P. (Eden Prairie MN), Transmitter with vernier measurement.
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  187. Tseng James W. (La Palma CA), Two wire capacitance transmitter.
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  188. Dahlke Charles J. (New Germany MN), Two wire transmitter for converting a varying signal from a remote reactance sensor to a DC current signal.
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  189. Hutton Peter B.,CAX ITX T32C1, Two-piece manifold.
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  190. Stern David M. (Merion Station PA), Two-wire level measuring instrument.
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  191. Mate David J. (San Diego CA), Two-wire transmitter.
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  192. Alcaide H. David (Bedford MA) Ewing James H. (Brockton MA), Vacuum monitoring.
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  193. Chou Alan F., Valve manifold.
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  194. Nishihara Toshihiko (Yokohama JPX), Variable-capacitance type sensor and variable-capacitance type sensor system using the same.
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  195. Frick Roger L. (Chanhassen MN) Schulte John P. (Eden Prairie MN), Vernier voltage-to-digital converter with a storage capacitance selectable in magnitude.
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  196. Karas Edwin L., Vertically mounted differential pressure transmitter having an integrally mounted sensor.
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  197. Gray ; Paul R. ; McCreary ; James L. ; Hodges ; David A., Weighted capacitor analog/digital converting apparatus and method.
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  198. Hodges David A. (Berkeley CA) Gray Paul R. (Orinda CA) McCreary James L. (Santa Clara CA), Weighted capacitor analog/digital converting apparatus and method.
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