FEHLERERFASSUNGSSCHALTUNG ZUR ERFASSUNG DES LECKSTROMS ZWISCHEN STROMVERSORGUNG UND FAHRZEUGRAHMEN
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
DE69503784(D1)
申请公布日期
1998.09.03
申请号
DE1995603784
申请日期
1995.06.01
申请人
NORTHROP GRUMMAN CORP., LOS ANGELES, CALIF., US
发明人
SCHANTZ, DAVID, LLOYD, JR., ELLICOTT CITY, MD 21043, US;MUNRO, JAMES, LOUIS, DUNKIRK, MARYLAND 20754, US