First and second microcomputers are connected to a ground. A first reference voltage generation circuit is connected between a first power supply and the first microcomputer, and supplies a first reference voltage to the first microcomputer when voltage of the first power supply is higher than the first reference voltage. A first monitoring circuit is connected between a second power supply and the first microcomputer, and supplies the first microcomputer with a first monitoring voltage for monitoring the second power supply. The first microcomputer includes a part configured to perform an operation based on the supplied first reference voltage and the supplied first monitoring voltage, wherein the operation includes detecting abnormality in the voltages of the first and second power supplies, and determining which one of the voltage of the first power supply and the voltage of the second power supply is abnormal.
Power supply voltage monitoring circuit, sensor circuit for vehicle, and power steering apparatus
2015-11-10
Patent
Elektronische Ressource
Englisch
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B62D MOTOR VEHICLES , Motorfahrzeuge |
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