发明名称 |
Gas flow rate measuring device |
摘要 |
A flow rate signal analog-digital conversion circuit 30, an adjustment processing circuit 40 and a chip temperature- sensor circuit 60 are disposed a single semiconductor chip 100 to form an integrated circuit, and a chip temperature signal in a form of digital signal outputted from the chip temperature sensor circuit 60 is inputted into the adjustment processing circuit 40 in which correction reducing temperature dependent error in a series of signal processing circuits is performed. Thereby, a board temperature dependent error in a gas flow rate measuring device can be reduced in which adjustment is performed for digital signals. <IMAGE>
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申请公布号 |
EP1321748(A2) |
申请公布日期 |
2003.06.25 |
申请号 |
EP20020008191 |
申请日期 |
2002.04.16 |
申请人 |
HITACHI, LTD.;HITACHI CAR ENGINEERING CO., LTD. |
发明人 |
MATSUMARA, TAKAFUMI;KATAGISHI, KENICHI;MATSUMOTO, MASAHIRO;HANZAWA, KEIJI |
分类号 |
G01F1/68;F02D41/18;F02D45/00;G01F1/00;G01F1/684;G01F1/696;(IPC1-7):G01F1/696 |
主分类号 |
G01F1/68 |
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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