astable multivibrator netlist
.title Inverting OpAmp amplifier
*file OpAmp.cir
.include Lm358.mod
XU1 4 3 1 2 6 Lm358/NS
R1 Lm358 4 30k
R2 4 5 100k
C1 3 5 10u
R3 3 Lm358 20k
Vp 1 0 5
Vn 2 0 -5
Vgnd 5 0 0

.control
tran 10u 600m 590m
plot v(Lm358)
.endc
.end