PS
# `VariableMan.m4'
cct_init

define(`elen_',dimen_); up_
[ { variable(`resistor(up_  dimen_)',A) };
   {"A" at last line.start below}; move right
 { variable(`resistor',N) }; {"N" at last line.start below}; move right
 { variable(`resistor',uN) }; {"uN" at last line.start below}; move right
 { variable(`resistor',NN) }; {"NN" at last line.start below}; move right
 { variable(`resistor',uNN) }; {"uNN" at last line.start below}; #; move right
 ]
[
 skp = 0.4
 hskip = linewid*0.5
 cskip = hskip
 { move right cskip+elen_+hskip
   line invis right_ elen_ "\tt C"; move right_ hskip
   line invis right_ elen_ "\tt S" }
 Loopover_(`char',
  `move down skp ifelse(char,A,*0.5)
   { line invis right_ cskip "\tt char"
     variable(`capacitor(,C)',char); move right_ hskip
     variable(`capacitor(,C)',char`'C); move right_ hskip
     variable(`capacitor(,C)',char`'S) }',
  A,P,L,N)
 ] with .w at last [].e+(0.4,0)

PE