*Subcircuit of control circuit (right side of Figure 5.6)
*Includes 4 copies of contPreI.spc
.include ./contPreI.spc
.subckt contPre enp onp op ep en on o e pe po Vdd 0
xcontP1 enp en pe Vdd 0 contPreI
xcontP2 onp on po Vdd 0 contPreI
xcontP3 op o po Vdd 0 contPreI
xcontP4 ep e pe Vdd 0 contPreI
.ends