An example file is given below.

Example input file:

VCCS, VCVS, non-linear dependency   
.param Vi=1 
.param Offs='0.01*Vi'
* VCCS depending on V(3) 
B21 int1 0 V = V(3)*V(3) 
G1 21 22 int1 0 1 
* measure current through VCCS 
vm 22 0 dc 0 
R21 21 0 1
* new VCCS depending on V(3) 
G51 55 225 cur = 'V(3)*V(3)-Offs' 
* measure current through VCCS 
vm5 225 0 dc 0 
R51 55 0 1
* VCVS depending on V(3) 
B31 int2 0 V = V(3)*V(3) 
E1 1 0 int2 0 1 
R1 1 0 1
* new VCVS depending on V(3) 
E41 4 0 vol = 'V(3)*V(3)-Offs' 
R4 4 0 1
* control voltage 
V1 3 0 PWL(0 0 100u {Vi})   
.control 
unset askquit 
tran 10n 100u uic 
plot i(E1) i(E41) 
plot i(vm) i(vm5) 
.endc   
.end