发明名称 |
ROTATING 3-WIRE RESISTANCE TEMPERATURE DETECTION EXCITATION CURRENT SOURCES AND METHOD |
摘要 |
In a temperature sensing circuit, a method for measuring a resistance of a RTD device to sense temperature includes (a) connecting a first terminal of the RTD device to a first current source and connecting a second terminal of the RTD device to a second current source; (b) measuring a first voltage across the RTD device; (c) connecting the second terminal of the RTD device to the first current source and connecting the first terminal of the RTD device to the second current source; (d) measuring a second voltage across the RTD device; and (e) deriving the resistance of the RTD device based on the first voltage measurement and the second voltage measurement. The RTD device may be connected in series with a sense resistor to ground. |
申请公布号 |
US2014241400(A1) |
申请公布日期 |
2014.08.28 |
申请号 |
US201414169090 |
申请日期 |
2014.01.30 |
申请人 |
Linear Technology Corporation |
发明人 |
Mayes Michael Keith;Kaplan Todd Stuart;Bliss David Edward |
分类号 |
G01K7/16 |
主分类号 |
G01K7/16 |
代理机构 |
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代理人 |
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主权项 |
1. A temperature sensing circuit for measuring the resistance of a RTD device having a first terminal and a second terminal, comprising:
a first current source; a second current source; and a switch circuit configured, in a first configuration, to connect the first terminal of the RTD device to the first current source and the second terminal of the RTD device to the second current source, and configured, in a second configuration, to connect the second terminal of the RTD device to the first current source and the first terminal of the RTD device to the second current source. |
地址 |
Milpitas CA US |