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[미국특허] Charge balanced feedback transmitter 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G01R-027/26
출원번호 US-0205268 (1988-06-10)
발명자 / 주소
  • Schulte John P. (Eden Prairie MN) Orth Kelly M. (Apple Valley MN) Frick Roger L. (Chanhassen MN) Westfield Brian L. (Eden Prairie MN) Paschke Randy K. (Chaska MN)
출원인 / 주소
  • Rosemount Inc. (Eden Prairie MN 02)
인용정보 피인용 횟수 : 45  인용 특허 : 5

초록

A charge balanced feedback type transmitter generates charge packets representative of a sensed parameter. Improved performance is achieved by the additiion of resistance connected between a charge packet generating reactance and an integrator to reduce the effects of noise caused by switching trans

대표청구항

A measurement circuit for providing an output signal as a function of a parameter, the circuit comprising: generating means for providing a generator signal which is formed by a plurality of charge packets and which is a function of the parameter, the generator means including reactance means for fo

이 특허에 인용된 특허 (5) 인용/피인용 타임라인 분석

  1. Briefer Dennis K. (Berlin MA), Capacitance measuring system.
  2. Grzybowski Richard R. (Meriden CT) Marshall Paul N. (Avon CT), Capacitive circuit for measuring a parameter having a linear output voltage.
  3. Tamura Hisashi (Tokyo JPX) Hirata Terutaka (Tokyo JPX) Odohira Tetsu (Tokyo JPX) Ogawa Tadahiro (Tokyo JPX), Capacitive type converter device.
  4. Wolfendale Peter C. F. (Milton Keynes GB2), Digital measurement of impedance ratios.
  5. Sell Robert C. (South Bend IN) Sheler John R. (South Bend IN) Juhasz John M. (Niles MI), Pressure measuring system.

이 특허를 인용한 특허 (45) 인용/피인용 타임라인 분석

  1. Kleven, Lowell A., Capacitance sensing circuit.
  2. Wang,Rongtai, Capacitance-to-digital interface circuit for differential pressure sensor.
  3. Sauer Donald Jon, Charge detector with long integration time.
  4. Gruler Martin (Aixheim DEX), Circuit for a transducer.
  5. Kemp, Christopher J.; Menzel, Christoph P., Converting sensed signals.
  6. Schulte, John P.; Tyson, David G.; Klosinski, Andrew J., Differential pressure sensor with line pressure measurement.
  7. Broden, David A.; Hedtke, Robert C.; Klosinski, Andrew J.; Sittler, Fred C., Differential pressure transmitter with complimentary dual absolute pressure sensors.
  8. Hedtke, Robert C., Differential pressure transmitter with pressure sensor.
  9. Wang, Rongtai, Excitation circuit for compensated capacitor industrial process control transmitters.
  10. Orth, Kelly M.; McGuire, Chad M., Field device incorporating circuit card assembly as environmental and EMI/RFI shield.
  11. Orth,Kelly; McGuire,Chad, Field device incorporating circuit card assembly as environmental and EMI/RFI shield.
  12. Orth, Kelly M., Field device with dynamically adjustable power consumption radio frequency communication.
  13. Vanderaa, Joel D.; Grunig, Christina A.; Hurd, Ronald F.; Westfield, Brian L.; McGuire, Chad M.; Paullus, Steven B., Form factor and electromagnetic interference protection for process device wireless adapters.
  14. Hedtke, Robert C., Industrial process device utilizing piezoelectric transducer.
  15. Hedtke, Robert C., Industrial process device utilizing piezoelectric transducer.
  16. Hedtke, Robert C.; Broden, David A.; Lu, Liang-Ju, Industrial process power scavenging device and method of deriving process device power from an industrial process.
  17. Harasyn,Donald E.; Willcox,Charles R., Line pressure measurement using differential pressure sensor.
  18. Willcox, Charles R., Method and apparatus for pressure measurement using magnetic property.
  19. Hedtke, Robert C.; Lu, Liangju, Method and apparatus for pressure measurement using quartz crystal.
  20. Chakraborty, Swapan; Karschnia, Robert J., Pipeline thermoelectric generator assembly.
  21. Brown, Gregory C.; Klosinski, Andrew J.; Trimble, Steven R.; Fandrey, Mark, Power generation for process devices.
  22. Arunachalam, Jawahar; Kasturi, Udayashankar Bangalore, Power supply for industrial process field device.
  23. Harasyn,Donald E.; Willcox,Charles R.; Klosinski,Andrew J., Pressure sensor fault detection.
  24. Schumacher,Mark; Klosinski,Andrew, Pressure sensor with deflectable diaphragm.
  25. Hedtke,Robert C., Pressure transmitter with acoustic pressure sensor.
  26. Klosinski,Andrew J.; Schulte,John P., Process control transmitter with vibration sensor.
  27. Karschnia,Robert J.; Willcox,Charles R.; Broden,David A.; Westfield,Brian L.; Orth,Kelly M., Process field device with radio frequency communication.
  28. Frick Roger L. ; Rud Jr. Stanley E. ; Broden David A., Process pressure measurement devices with improved error compensation.
  29. Frick, Roger L., Process sensor module having a single ungrounded input/output conductor.
  30. Schnaare,Theodore Henry; McGuire,Chad Michael, Process transmitter with overpressure vent.
  31. Hedtke, Robert C., Process transmitter with wireless communication link.
  32. Sittler, Fred C.; Hedtke, Robert C., Process variable transmitter with acceleration sensor.
  33. Kielb, John A.; Karschnia, Robert J.; Westfield, Brian L.; Orth, Kelly M.; Broden, David A., RF adapter for field device.
  34. Kielb, John A.; Westfield, Brian L., RF adapter for field device with loop current bypass.
  35. Kielb, John A.; Westfield, Brian L.; Orth, Kelly M., RF adapter for field device with low voltage intrinsic safety clamping.
  36. Kielb, John A., RF adapter for field device with variable voltage drop.
  37. Klosinski, Andrew J.; Willcox, Charles R., Resonant frequency based pressure sensor.
  38. Wang, Rongtai, Sigma-delta analog to digital converter for capacitive pressure sensor and process transmitter.
  39. Chakraborty, Swapan, Thermoelectric generator assembly for field process devices.
  40. Vanderaa, Joel David, Wire harness for field devices used in a hazardous locations.
  41. Vanderaa, Joel D.; Grunig, Christina A.; Hurd, Ronald F., Wireless communication adapter for field devices.
  42. Korolev, Eugene, Wireless interface within transmitter.
  43. Brown, Gregory; Hausler, George; Ostby, Philip; Karschnia, Robert; Nelson, Richard; Fandrey, Mark, Wireless power and communication unit for process field devices.
  44. Strei, David Matthew; Vanderaa, Joel David, Wireless process communication adapter with improved encapsulation.
  45. Nelson, Richard L.; Ostby, Philip G.; Brown, Gregory C., Wireless process field device diagnostics.

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