Comparator

Components nominal values
Operational amplifier:1(Opamp2)	OA2_1
Resistors :3	Rm=20.0KW, Rin=10KW, Rf=20.0KW

Comparator frequency response with nominal component values.

Component variation table	Nominal value	Variation at 1s
Rin	10.0KW	500 W
Rm	20.0KW	1.0KW
Rf	20.0KW	1.0KW

Comparator frequency response with component variation.

Hard fault table	Faults	No. of faults
OA2_1	Opamp faults	20
Rm, Rin, Rf	Stuck-open/stuck-short	2x3=6
Total no. of faults		26

Soft fault table	Nominal value	-6s	+6s
Rin	10.0KW	7.0KW	13.0KW
Rm	20.0KW	14.0KW	26.0KW
Rf	20.0KW	14.0KW	26.0KW

*comparator circuit -AC analysis
*- + out vdd vss
.Subckt opamp 4 5 8 1 11
.MODEL mosn NMOS
+ vto=1 kp=17u gamma=1.3 lambda=0.01 phi=0.7
+pb=0.8 mj=0.5 mjsw=.3 cgso=350p cgdo=350p cgbo=200p
+cj=300u cjsw=500p ld=0.8u tox=80n
.MODEL mosp PMOS
+ vto=-1 kp=8u gamma=.6 lambda=0.02 phi=0.6
+pb=0.5 mj=0.5 mjsw=.25 cgso=350p cgdo=350p cgbo=200p
+cj=150u cjsw=400p ld=0.8u tox=80n
R1a 6 66 1U
R1b 66 3 100g
m1 66 4 3 3 mosp w=20u l=10u
R2a 7 77 1U
R2b 77 3 100g
m2 77 5 3 3 mosp w=20u l=10u
R3a 6 67 1U
R3b 67 11 100g
m3 67 6 11 11 mosn w=36u l=10u
R4a 7 78 1U
R4b 78 11 100g
m4 78 6 11 11 mosn w=36u l=10u
R5a 3 33 1U
R5b 33 1 100g
m5 33 2a 1 1 mosp w=30u l=10u
R6a 8 88 1U
R6b 88 11 100g
m6 88 7 11 11 mosn w=100u l=10u
R7a 8 89 1U
R7b 89 1 100g
m7 89 2 1 1 mosp w=42u l=10u
R8a 2 22 1U
R8b 22 11 100g
m8 22 6 11 11 mosn w=60u l=10u
R9a 2 23 1U
R9b 23 1 100g
m9 23 2 1 1 mosp w=30u l=10u
Rc 7 76 1U
cc 76 8 6p
Rs 76 8 100g
vbias 2a 0 .1
.ends

*MAIN CIRCUIT
VCC 7 0 15.0
VEE 4 0 -15.0
VIN 12 0 ac 1
Rin 12 2 10.0K
Rm 3 0 20.0K
Rf 3 6 20.0K
X1 2 3 6 7 4 opamp
.ac dec 20 10 1g
.plot vdb(6)
.options list node post=2
.END