S3.2.1IR调理一电位计 电位计原理图 R K L丿m=0 1+(1-R/R)R/R om 99 §3.2.1 IR调理——电位计 电位计原理图 R Rx E R0m A l R =  A K  = ( ) ( ) ( ) L m x x o m L m V R R R R V + − = =  1 1 1 0 0