The high-end current monitor circuit formed by OP184

Published:2011/6/8 21:12:00 Author:leo | Keyword: The high-end current monitor circuit formed by OP184, 2SA970, OP184, MOSFET | From:SeekIC

The picture shows a high-end current monitor circuit formed by OP184. In this circuit, A1 adopts OP184 operating amplifier. VT1 adopts 2SA970 transistor. When Is comes close to OA, the collector cutoff current of VT1 is the main factor that causes differences. When VT1 selects P channel JFET, it can improve detection precision. Now JFET with high pressure resistance is rare. So P channel MOSFET can be used instead of it. Using high degree accuracy resistance will also improve the detecting accuracy.



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