发明名称 |
Multiplexed dual-purpose magnetoresistive sensor and method of measuring current and temperature |
摘要 |
The present invention determines temperature and current from resistance measurements of a single magnetoresistive sensor. A dual-purpose sensor includes the magnetoresistive sensor having a single pair of terminals. The sensor is multiplexed under separate current conditions to produce both a temperature measurement and a current measurement in a vicinity of the sensor. A sensor system includes the dual-purpose sensor, a resistance sensing subsystem and a controller that controls the current conditions. A method of measuring temperature and current includes measuring a first resistance of the dual-purpose sensor while a first current is flowing in a conductor adjacent to the sensor, and measuring a second resistance of the sensor while a second current is flowing in the conductor. The first current has a known value while the second current has an unknown value. The temperature and current are determined respectively from the first and second resistance measurements.
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申请公布号 |
US7239123(B2) |
申请公布日期 |
2007.07.03 |
申请号 |
US20030682344 |
申请日期 |
2003.10.09 |
申请人 |
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. |
发明人 |
RANNOW RANDY K.;WINICK BRADLEY D.;HARRIS SHAUN L. |
分类号 |
G01K7/20;G01R33/09;G01K7/24;G01K7/36;G01R1/44;G01R15/20;G01R19/00;G01R33/00;H01L43/08 |
主分类号 |
G01K7/20 |
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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