Uo=U(RL//Rx)/((RL//Rx)+(Rmax-Rx))
=RL*Rx*U/((RL*Rx)+(Rmax-Rx)*(RL+Rx))
=RL*Rx*U/(Rmax*Rx+Rmax*RL-Rx*Rx)
=(RL*Rx*U/Rmax^2)/(Rx/Rmax+RL/Rmax-Rx^2/Rmax^2)
=RL*(U/Rmax)*(X/L)/(X/L-X^2/L^2+RL/Rmax)
当RL=无穷大时,
Uo=(U/Rmax)*(X/L)
误差E=RL*(U/Rmax)*(X/L)/(X/L-X^2/L^2+RL/Rmax)-(U/Rmax)*(X/L)
=(U/Rmax)*(X/L)(RL/(X/L-X^2/L^2+RL/Rmax))