US Patent No: 5,343,755
Number of patents in Portfolio can not be more than 2000
Strain gage sensor with integral temperature signal
Stats
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Sep 6, 1994
Issued date -
May 5, 1993
filing date -
08/057,745
serial no -
In Force
status
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Abstract
A strain gage pressure sensor having a resistive bridge circuit from which is measured both the applied pressure and the temperature of the pressure sensor. A constant voltage is provided across the bridge circuit such that any temperature caused changes in the resistance of the bridge circuit are reflected in the flow of a bridge current through the bridge circuit. A sense resistor is electrically coupled to the bridge circuit such that any change in the bridge current causes a change in the voltage drop across the sense resistor. The voltage drop and the pressure output signal are digitized and suitably processed resulting in a highly accurate, corrected pressure output for use with suitable pressure instrumentation.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,233,848 Strain gauge pressure transducer apparatus having an improved impedance bridge | 22 | 1978 | |
| 4,813,272 Semiconductor pressure sensor | 27 | 1987 | |
| 4,911,016 Semiconductor strain gauge bridge circuit | 26 | 1989 | |
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| 4,432,247 Load cell having thin film strain gauges | 34 | 1981 | |
| 4,633,721 Load cell having a thin film strain-inducible element | 12 | 1985 | |
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| 5,146,788 Apparatus and method for a temperature compensation of a catheter tip pressure transducer | 23 | 1990 | |
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| 5,042,307 Amplifying compensation circuit for semiconductor | 22 | 1990 | |
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| 4,299,130 Thin film strain gage apparatus with unstrained temperature compensation resistances | 20 | 1979 | |
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| 4,462,018 Semiconductor strain gauge with integral compensation resistors | 30 | 1982 | |
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| 5,187,985 Amplified pressure transducer | 21 | 1991 | |
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| 4,202,218 Bridge circuit | 26 | 1978 | |
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| 4,576,052 Semiconductor transducer | 35 | 1984 | |
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| 4,715,003 Method for temperature compensation and measuring circuit therefor | 61 | 1985 | |
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| 4,798,093 Apparatus for sensor compensation | 19 | 1986 | |
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| 5,024,101 Power source circuit and bridge type measuring device with output compensating circuit utilizing the same | 22 | 1990 | |
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| 4,414,837 Apparatus and methods for the shunt calibration of semiconductor strain gage bridges | 8 | 1982 | |
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| 4,777,826 Twin film strain gauge system | 47 | 1987 | |
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| 4,667,516 Circuit arrangement for compensating for the temperature dependence of the sensitivity and the null point of a piezoresistive pressure sensor | 22 | 1986 | |
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| 4,800,513 Auto-calibrated sensor system | 28 | 1986 | |
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| 4,276,776 Temperature/pressure transducer | 4 | 1980 | |
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| 4,300,395 Semiconductor pressure detection device | 25 | 1979 | |