Electronic control unit
US9600047B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2013 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Aug 22, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is an electronic control unit capable of identifying an abnormality in a power supply voltage without narrowing the operating voltage range, and having minimal effects on cost and the circuit mounting surface area. The ECU includes a microcomputer containing an input terminal VCCin and an input terminal Vrin, a power supply IC that supplies a power supply voltage VCC to the input terminal VCCin, and as a reference-voltage-generator circuit a voltage-divider resistor and a voltage-divider resistor configuring a voltage-dividing circuit that outputs a sub-divided voltage Vc is sub-divided from the power supply voltage VCC, a capacitor coupled at one end to the input terminal Vrin and coupled on at the other end to ground, and a voltage isolation element coupled between the voltage-dividing circuit and the input terminal Vrin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.