Current detector,申请号EP20000123137-传众专利搜索

Current detector

申请公布号：EP1096262(A3)

申请号：EP20000123137

申请日期：2000.10.25

申请公布日期：2004.01.02

申请人：

AUTONETWORKS TECHNOLOGIES, LTD.;SUMITOMO WIRING SYSTEMS, LTD.;SUMITOMO ELECTRIC INDUSTRIES, LTD.

发明人：TAKAGI, KOUICHI;ENDOH, TAKEHI

分类号：G01R19/00;G01R19/165;G05F1/10;G05F3/26

主分类号：G01R19/00

摘要：When a circuit is activated, bases of transistors Q1 and Q2 making up a first current mirror circuit 7 are grounded through switch means 10, whereby a current is forcibly made to flow into the bases of the transistors Q1 and Q2. Thus, the circuit operation can be made reliable at the activation time. A part of load current is shunted with good accuracy via a resistor R1 having a first resistance value of a predetermined magnification of a resistance value of a shunt resistor Rs, the first current mirror circuit 7, and a second current mirror circuit 8, and the output end of the shunted current is grounded via a resistor R2 having a second resistance value, so that an output voltage VOUT proportional to a load current IL can be obtained with good accuracy from the resistor R2 and the load current IL can be found with good accuracy from the output voltage VOUT. <IMAGE>