lab3d - band-gap w / .ic
.options list node post
.op
.ic v(bg)=1.5
vcc vcc 0 10
q1 3 bg 1 labn m=8
q2 5 bg 2 labn
q3 3 4 vcc labp 
q4 4 4 vcc labp
q5 5 3 4 labp
q6 vcc 5 out labn m=10
r1 1 2 100
r2 2 0 560
r3 out bg 3k
r4 bg 0 1k
.model labn npn
.model labp pnp
.end