* SPICE netlist
XU1 in N001 VDDH 0 N002 OPA462 ;pnba In+)In-)V+)V-)OUT
V1 VDDH 0 180
R1 N002 N001 100k
R2 N001 VDDC 4k
RLOAD out 0 2k
Rb1 out N002 {Rb}
V2 in VDDC SINE(0 2.85 26k)
XU2 N005 N003 VDDH 0 N003 OPA462 ;pnba In+)In-)V+)V-)OUT
Rb2 N004 N003 {Rb}
XU3 N005 N007 VDDH 0 N007 OPA462 ;pnba In+)In-)V+)V-)OUT
Rb3 N004 N007 {Rb}
XU4 N005 N008 VDDH 0 N008 OPA462 ;pnba In+)In-)V+)V-)OUT
Rb4 N004 N008 {Rb}
XU5 N006 VDDC VDDH 0 VDDC OPA462 ;pnba In+)In-)V+)V-)OUT
R3 VDDH N006 10k
R4 N006 0 7.143k
.tran 0 100u 0
.include OPA462.LIB
;step param Vp 2.8 2.5 0.25
.param Vp=1k
.param Rb=3

* LTspice schematic (.asc)
Version 4
SHEET 1 2192 816
WIRE 328 -392 168 -392
WIRE 520 -392 408 -392
WIRE 56 -248 -56 -248
WIRE 168 -248 168 -392
WIRE 168 -248 136 -248
WIRE 264 -248 168 -248
WIRE 520 -232 520 -392
WIRE 520 -232 328 -232
WIRE 696 -232 520 -232
WIRE 984 -232 776 -232
WIRE 1096 -232 984 -232
WIRE 216 -216 24 -216
WIRE 264 -216 216 -216
WIRE 24 -120 24 -216
WIRE 616 -120 456 -120
WIRE -1064 -104 -1096 -104
WIRE -568 -104 -696 -104
WIRE -504 -104 -568 -104
WIRE -1096 -40 -1096 -104
WIRE 456 -24 456 -120
WIRE 504 -24 456 -24
WIRE 24 -8 24 -40
WIRE 616 -8 616 -120
WIRE 616 -8 568 -8
WIRE 696 -8 616 -8
WIRE 808 -8 776 -8
WIRE 504 8 424 8
WIRE -696 24 -696 -104
WIRE -664 24 -696 24
WIRE -568 40 -568 -104
WIRE -568 40 -600 40
WIRE -776 56 -776 8
WIRE -664 56 -776 56
WIRE 616 72 456 72
WIRE -776 104 -776 56
WIRE 456 168 456 72
WIRE 504 168 456 168
WIRE 616 184 616 72
WIRE 616 184 568 184
WIRE 696 184 616 184
WIRE 808 184 808 -8
WIRE 808 184 776 184
WIRE 424 200 424 8
WIRE 504 200 424 200
WIRE 616 264 456 264
WIRE 456 360 456 264
WIRE 504 360 456 360
WIRE 616 376 616 264
WIRE 616 376 568 376
WIRE 696 376 616 376
WIRE 808 376 808 184
WIRE 808 376 776 376
WIRE 424 392 424 200
WIRE 504 392 424 392
FLAG -1096 40 0
FLAG 1096 -152 0
FLAG 216 -216 in
FLAG 296 -200 0
FLAG 296 -264 VDDH
FLAG 24 -8 VDDC
FLAG -56 -248 VDDC
FLAG 536 -40 VDDH
FLAG 536 24 0
FLAG 536 152 VDDH
FLAG 536 216 0
FLAG 536 344 VDDH
FLAG 536 408 0
FLAG 984 -232 out
FLAG -1064 -104 VDDH
FLAG -632 8 VDDH
FLAG -632 72 0
FLAG -504 -104 VDDC
FLAG -776 -72 VDDH
FLAG -776 184 0
SYMBOL OpAmps\\opamp2 296 -296 R0
SYMATTR InstName U1
SYMATTR Value OPA462
SYMBOL voltage -1096 -56 R0
SYMATTR InstName V1
SYMATTR Value 180
SYMBOL res 424 -408 R90
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL res 152 -264 R90
SYMATTR InstName R2
SYMATTR Value 4k
SYMBOL res 1080 -248 R0
SYMATTR InstName LOAD
SYMATTR Value 2k
SYMBOL res 792 -248 R90
SYMATTR InstName Rb1
SYMATTR Value {Rb}
SYMBOL voltage 24 -136 R0
SYMATTR InstName V2
SYMATTR Value SINE(0 2.85 26k)
SYMBOL OpAmps\\opamp2 536 -72 R0
SYMATTR InstName U2
SYMATTR Value OPA462
SYMBOL res 792 -24 R90
SYMATTR InstName Rb2
SYMATTR Value {Rb}
SYMBOL OpAmps\\opamp2 536 120 R0
SYMATTR InstName U3
SYMATTR Value OPA462
SYMBOL res 792 168 R90
SYMATTR InstName Rb3
SYMATTR Value {Rb}
SYMBOL OpAmps\\opamp2 536 312 R0
SYMATTR InstName U4
SYMATTR Value OPA462
SYMBOL res 792 360 R90
SYMATTR InstName Rb4
SYMATTR Value {Rb}
SYMBOL OpAmps\\opamp2 -632 -24 R0
SYMATTR InstName U5
SYMATTR Value OPA462
SYMBOL res -792 -88 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res -792 88 R0
SYMATTR InstName R4
SYMATTR Value 7.143k