[특허]Wide-range thermistor meter

Wide-range thermistor meter 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01R-019/22 G01R-001/30
출원번호	US-0188076 (1994-01-27)
발명자 / 주소	Hinrichs Karl (Westminster CA) Mohtashemi Abdollah (Laguna Niguel CA)
출원인 / 주소	Newport Electronics, Inc. (Santa Ana CA 02)
인용정보	피인용 횟수 : 28 인용 특허 : 0

초록 ▼

A meter measures a voltage across a quasi-diode, the voltage caused by a current flowing through a resistance which changes substantially exponentially with changes in a medium being sensed. The meter comprises a logarithmic current measuring circuit coupled to the resistance to provide a measurement output that is a logarithmic function of the current flowing through the sensing resistance. A switchable current source is controlled by a switching circuit to repetitively output first and second current values. A reference logarithmic circuit is connected to the switchable current source and is physically coupled to the logarithmic measuring circuit so as to be maintained at a substantially equal temperature value. The logarithmic reference circuit manifests a first voltage in response to the first current value and a second voltage in response to the second current value, both voltage values dependent upon the temperature of the logarithmic reference circuit. A processor controls the switchable current source to operate at a repetition rate which assures that the first and second current values occur sufficiently rapidly so that the first and second voltages are manifest before the temperature value has had an opportunity to substantially vary. The processor derives from the first voltage, second voltage, and the measuring circuit output, a corrected output that eliminates meter temperature affects.

대표청구항 ▼

A meter for measuring a voltage at a resistance that responds to changes in a medium being sensed by exhibiting substantially exponential resistance changes, said meter comprising: measuring logarithmic means coupled to said resistance for providing a measurement output that is a substantially logarithmic function of said voltage at said resistance, accuracy of said measurement output dependent upon a temperature value of said measuring logarithmic means; a switchable current source; switch means for causing said switchable current source to repetitively output first and second current values; reference logarithmic means connected to said switchable current source and physically coupled to said measuring logarithmic means so as to be maintained at a substantially same temperature value as said measuring logarithmic means, said reference logarithmic means manifesting a first voltage in response to said first current value and a second voltage in response to said second current value, said first and second voltages dependent upon said same temperature value; processor means for controlling said switch means to operate at a repetition rate which assures that a said first voltage and a said second voltage are manifest before said same temperature value has an opportunity to substantially vary, said processor means deriving from said first voltage, said second voltage and said measurement output a corrected measurement output, that takes into account said same temperature value.

이 특허를 인용한 특허 (28)

Akins, Mark; Avdic, Elma; Bower, Matt; Morehead, Bruce, Apparatus, system, and method for accurately reading high and low temperatures.
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Goh, JiunHeng; Bucur, Constantin, Auto-ranging thermistor-based temperature detection system.
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Hong, Merit; Harnishfeger, David; Kaufman, Kris, Calibrated temperature measurement system.
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Shidemantle, Jack P.; Kill, Robert A., Digitally modified resistive output for a temperature sensor.
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Shidemantle,Jack P.; Kill,Robert A., Digitally modified resistive output for a temperature sensor.
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Cambridge Vivien J. ; Koger Thomas L. ; Nail William L. ; Diaz Patrick, Electronic clinical predictive thermometer using logarithm for temperature prediction.
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Pippin,Jack D., Fail-safe thermal sensor apparatus and method.
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Thomson, David; Blake, John; Manus, Lorcan Mac, Four current transistor temperature sensor and method.
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Subramaniyam,Ganesh; Hammond,Gary, Method and apparatus for lowering the die temperature of a microprocessor and maintaining the temperature below the die burn out.
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Borys S. Senyk, Method and apparatus for monitoring the temperature of a processor.
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Pippin Jack D., Method and apparatus for programmable thermal sensor for an integrated circuit.
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Pippin,Jack D., Method and apparatus for programmable thermal sensor for an integrated circuit.
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Van Phan,Nghia; Rosno,Patrick Lee; Strom,James David, Method and reference circuit for bias current switching for implementing an integrated temperature sensor.
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Forsyth, Richard, Method for obtaining a temperature--independent voltage reference as well as a circuit arrangement for obtaining such a voltage reference.
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Gunther, Stephen H.; Binns, Frank; Pippin, Jack D.; Rankin, Linda J.; Burton, Edward A.; Carmean, Douglas M.; Bauer, John M., Methods and apparatus for thermal management of an integrated circuit die.
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Gunther,Stephen H.; Binns,Frank; Pippin,Jack D.; Rankin,Linda J.; Burton,Edward A.; Carmean,Douglas M.; Bauer,John M., Methods and apparatus for thermal management of an integrated circuit die.
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Franch, Robert L.; Jenkins, Keith A., On chip temperature measuring and monitoring circuit and method.
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Felder,Matthew D., On-chip digital thermometer to sense and measure device temperatures.
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Linda J. Rankin ; Edward A. Burton ; Stephen H. Gunther ; Jack D. Pippin, Programmable thermal management of an integrated circuit die.
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Breinlinger, Richard H., Solid state temperature measuring device and method.
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Breinlinger,Richard H., Solid state temperature measuring device and method.
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Pippin, Jack D., Temperature averaging thermal sensor apparatus and method.
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Lepidis, Polichronis; Schiller, Uwe, Temperature detection device having a diode and an analog-digital converter.
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Beatty Timothy S. ; McAllister Christopher P. ; Fletcher Thomas D., Temperature measurement and compensation scheme.
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Pippin, Jack D., Temperature-based clock frequency controller apparatus and method.
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Pippin, Jack D., Temperature-based cooling device controller apparatus and method.
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Pippin, Jack D., Temperature-based cooling device controller apparatus and method.
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Aslan, Mehmet; Henderson, Richard Dean; Wong, Michael; Ren, Qing Feng; Ng, Chungwai Benedict; Oshima, Hideya, Time-interleaved sampling of voltages for improving accuracy of temperature remote sensors.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Wide-range thermistor meter 원문보기

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Wide-range thermistor meter 원문보기

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이 특허를 인용한 특허 (28)

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