Aufgabe 1
d0 n1 0 diode1
.model diode1 d RS=0.6
ve n1 0 dc
.dc ve 0 0.8 0.005
.control
run
plot -i(ve)

Aufgabe 1b
r0 n1 n2 1k
r1 n2 n3 1k
d0 n3 0 diode1
d1 n4 n2 diode1
r2 n4 0 2k
vin n1 0 dc 0 pwl(0 0 0.25m 10 0.5m 0 0.75m -10 1m 0) 
.model diode1 d RS=0.6
.tran 1u 1m
.control
run
plot v(n1) v(n2) xlabel t ylabel U