发明名称 |
FAULT DETECTION CIRCUIT FOR SENSING LEAKAGE CURRENTS BETWEEN POWER SOURCE AND CHASSIS |
摘要 |
A fault detection circuit for detecting leakage currents between a DC power source and chassis of an automobile, includes a voltage sensor coupled to the DC power source, the voltage sensor including an analog reference and a chassis ground. A differential amplifier is coupled to the voltage sensor and detects variations in the analog reference and the chassis ground. A voltage comparator unit determines whether the variations detected in the differential amplifier is above a predetermined threshold value. A built-in test circuit tests whether the fault detection circuit is operating correctly. |
申请公布号 |
EP0764275(A1) |
申请公布日期 |
1997.03.26 |
申请号 |
EP19950920693 |
申请日期 |
1995.06.01 |
申请人 |
NORTHROP GRUMMAN CORPORATION |
发明人 |
SCHANTZ, DAVID, LLOYD, JR.;MUNRO, JAMES, LOUIS |
分类号 |
G01R31/00;G01R31/02;(IPC1-7):G01R31/00 |
主分类号 |
G01R31/00 |
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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