中文摘要：

为了实现量化电流检测及提高检测精度,提出了一种负载电流检测电路.通过采用具有完全对称结构的共模负反馈以及差模正反馈检测架构,实现了对由制造工艺所引起失调的良好抑制,同时在电源轨范围内可对微小误差信号具有极其稳定且任意可调的放大倍数.该电路采用30V双极-CMOS-DMOS工艺实现,仿真及实测结果证明在各工艺角下,-40°-125°温度范围内检测误差均小于±3%.

英文摘要：

To quantify and improve the accuracy of load current detection,a load current sensing cir-cuit was proposed.By adopting a completely symmetrical common-mode negative feedback （CMNF） as well as the differential-mode positive feedback （DMPF）technique,the offset induced by process was greatly restrained.What′s more,the tiny sensing signal was able to be reliably amplified by an arbitrary time within the power rail.This proposed technique has been realized and verified in a 30 V bipolar-CMOS-DMOS （BCD）process,simulation as well as practical results show that the detection error can be less than ±3% with the temperature ranges from -40°to 125°.