Low-pass filter
|
Components with nominal values |
|
|
Operational amplifier:1(Opamp1) |
OA1 |
|
Resistors:3 |
R1=1KW , R2=1.5KW , R3=15KW |
|
Capacitor:1 |
C1=0.01mF |
Low-pass filter frequency response with
nominal component values
|
Component variation table |
Nominal value |
Variation at 1s |
|
R1 |
1.0 KW |
70 W |
|
R2 |
1.5 KW |
105 W |
|
R3 |
15.0 KW |
2.25 KW |
|
C1 |
0.01 mF |
0.7 nF |
Low-pass filter frequency response with
nominal component values
|
Hard fault table |
Faults |
No. of faults |
|
OA1 |
Opamp faults |
1x22=22 |
|
R1-R3 |
Stuck-open/stuck-short |
2x3=6 |
|
C1 |
Stuck-open/stuck-short |
1x2=2 |
|
Total no. of faults |
|
30 |
|
Soft fault table |
Nominal value |
-6s |
+6s |
|
R1 |
1.0 KW |
580 W |
1420 W |
|
R2 |
1.5 KW |
870 W |
2.130KW |
|
R3 |
15.0 KW |
1.5KW |
28.5KW |
|
C1 |
0.01 mF |
5.8 nF |
0.0142 mF |
*Lowpass
Rc filter 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 6 0 -15.0
VIN 2 0 ac 1
Rin 2 3 1.0K
Rcse 3 33 1
Rcpl 33 0 100meg
c1 33 0 0.01uf
R3 5 0 15.0K
R2 5 4 1.5K
X1 5 3 4 7 6 opamp
.ac dec 20 10
1g
.plot vdb(4)
.options list node post=2
.END