发明名称 |
Thermistor circuit calibration |
摘要 |
Temperature detection circuitry is selectively coupled to a thermistor and one of two sources representing the impedance at respective ends of the expected range of temperature to which the thermistor is to be exposed. The offset of an amplifier and a scale factor to account for gain set of the amplifier are determined in an automatic calibration process while coupled to the source(s), and thereafter temperature readings are taken from the thermistor. During the calibration process, if the gain or scale factor are outside of expected ranges, a failure is determined and an alarm given and/or a heater is disabled. |
申请公布号 |
US8197123(B2) |
申请公布日期 |
2012.06.12 |
申请号 |
US20070927000 |
申请日期 |
2007.10.29 |
申请人 |
SNYDER ROBERT L.;WHEATLEY MAURICE;SMITHS MEDICAL ASD, INC. |
发明人 |
SNYDER ROBERT L.;WHEATLEY MAURICE |
分类号 |
G01K7/16;G01K7/22;G01K7/25;G01K15/00 |
主分类号 |
G01K7/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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