求教此電路（跨导放大器）的工作原理

INP INN为输入同相端与反向端

TIPS: INP INN为 输入的同相端与反向端；最右边的INP和左边的INP是连在一起的.

检测流过电阻

怎么工作的呢?

this should be one current sense circuit, it can sense Power MOS current. IB*RS+IS*RS=IB*RS+IP*RP+IB*RP=》IS*RS=IP*RP(RB is series with INP and INN,RP is
Power MOS resistor)
to equal INP=INN, you can get the answer.

thx for your help！
what iare RS/ IS /RP refer to ?
and can you explain the circuit in more detail? 5# rfzheng

学习了！