发明名称 |
Current detecting circuit |
摘要 |
<p>In a current detecting circuit, a virtual earth generating circuit 7 generates a low voltage VSS lower by a predetermined potential difference than a battery voltage VBT outputted from an on-vehicle batteryl. A CPU 5 operates while the low voltage VSS is used as an earth potential and the voltage VBT higher by the predetermined voltage value than the low voltage VSS is used as a power-supply voltage. A/D conversion input terminals 53 and 54 of the CPU 5 are connected to the battery 1 side of a current detecting resistor 3 and the load 4 side of the resistor 3. The voltages on the battery 1 side and the load 4 side of the resistor 3 to be inputted to the terminals 53 and 54 are detected by an A/D converter 60. A load current ILD is calculated based on the detected results and the resistor 3 resistance. <IMAGE></p> |
申请公布号 |
EP1182761(A2) |
申请公布日期 |
2002.02.27 |
申请号 |
EP20010120189 |
申请日期 |
2001.08.22 |
申请人 |
AUTONETWORKS TECHNOLOGIES, LTD.;SUMITOMO WIRING SYSTEMS, LTD.;SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
MIZUNO, FUMIAKI;ISSHIKI, ISAO |
分类号 |
H02H1/00;H02H3/087;H03K17/08;(IPC1-7):H02H3/087 |
主分类号 |
H02H1/00 |
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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