* comparator Simulation
* this file edited to remove everything not in tt lib
.lib "./sky130_fd_pr/models/sky130.lib.spice" tt
.include comparator-preamp.spice
.include comparator-decision.spice
.include comparator-diffamp.spice

* instantiate the comparator
Xpre VP VN VPAMP VNAMP VI BIASN VGND VPWR comparator-preamp
Xdec VPAMP VNAMP VOP VON VGND VPWR comparator-decision
Xdif VOP VON VOUT VGND VDD comparator-diffamp

* set gnd and power
Vgnd VGND 0 0
Vdd3v3 VPWR VGND 3
Vdd1v8 VDD  VGND 1.8

* set bias voltage
Vbias BIASN VGND 0.3

VNin VN VGND 1.5


* create VP-in
*VPin VP VGND pulse(0 3 1p 1n 1n 1n 2n)
VPin VP VGND SINE(1.5 0.1 10Meg)
*VPin VP VGND 1.5

.tran 10e-12 200e-09 0e-00
*.dc VPin 0 3 0.002 VNin 0 3 0.2

.control
run
set color0 = white
set color1 = black
plot VOUT
plot VP VN VOUT VPWR
*plot VPAMP VNAMP VI
*plot VOP VON
*plot i(Vdd3v3)
*plot i(Vdd1v8)
.endc

.end