注：由此得R1、R2、R3、R6在电路中起到调节采集电压范围至-1.65V~+1.65V;(1)计算U+电压：U+=V+*[R3/(R2+R3)]+1.65*[R3/(R2+R3)];(6)将所有算式带入式5：Vadc=[R3*(V+-V-)]/R1+1.65V;(3)计算Ir1(设参考电流方向向右)：Ir1=[(U-)-(V-)]/R1;(5)Vadc-(V-)=Ir1*(R1+R6)（R7较小