Single-Stage Amplifier

Component with nominal values
BJTs:1	BJT (beta=80)
Resistors	R1=17.6KW, R2=61.0KW, R3=1.2KW, R4=300.0 W, Rb=100 W

Single-stage amplifier frequency response with nominal component values.

Component variation table	Nominal Value	Variation at 1 Sigma
b	80	12
R1	17.6KW	0.9KW
R2	61.0KW	3.1KW
R3	1.2KW	60 W
R4	300.0 W	15 W
Rb	100 W	5 W

Single-stage amplifier frequency response with component variation.

Hard fault table	Fault	No. of faults
BJT1	Stuck-open/stuck-short	1x6=6(refer fault models)
BJT1	Low beta/high beta	1x2=2
R1,R2,R3,R4,Rb	Stuck-open/stuck-short	2x5=10
Total no. of faults:		18

Soft fault table	Nominal Value	- 6 Sigma	+6 Sigma
b	80	6	152
R1	17.6KW	12.2KW	23.0KW
R2	61.0KW	42.4KW	79.6KW
R3	1.2KW	0.84KW	1.5.6KW
R4	300.0 W	210.0 W	390.0 W
Rb	100 W	70 W	130 W

* single stage amplifier
vin 1 0 ac 1
VCC 8 0 5.0
R3 8 3 1.2k
RC 3 6 1.0
Rb 1 5 100.0
R2 8 1 61.0K
R1 1 0 17.6k
RE 4 7 1.0
R4 7 0 300.0
Rbc 5 6 1.0E8
Rbe 5 4 1.0E8
Rce 6 4 1.0E8
Q1 6 5 4 QNL
.model QNL NPN(beta=80 cap_csb=2PF Cap_be=3PF
+Cap_ibc=2PF )

.ac dec 20 10 1e+8
.plot vdb(6)
.options list node post=2
.END