* SPICE netlist
R1 N001 Input_step 1k
R2 Out_PreAmp N001 10k
V2 N004 0 5
V3 0 N006 5
XU1 0 N001 N004 N006 Out_PreAmp level1 Avol=1Meg GBW={GBWP} Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
R3 N002 N003 500
R4 Out_FS N002 25k
V4 N005 0 5
V5 0 N007 5
XU2 0 N002 N005 N007 Out_FS level1 Avol=1Meg GBW={GBWP} Vos=0 En=0 Enk=0 In=0 Ink=0 Rin=500Meg ;pnba In+)In-)V+)V-)OUT
V1 Input_Muon 0 PWL file=photon_data_2_photons.txt
R5 0 Out_FS 100k
C1 N003 Input_step 5p
C2 Out_FS N002 100f
V6 Input_step 0 PULSE(0 -10m 20n 0.01n 0.01n 50n 0 1)
R6 Out_PreAmp 0 10k
.step param GBWP 500Meg 501Meg 1Meg
.tran 200n

* LTspice schematic (.asc)
Version 4
SHEET 1 2640 896
WIRE -456 -320 -568 -320
WIRE -248 -320 -376 -320
WIRE 664 -272 552 -272
WIRE 872 -272 744 -272
WIRE -1320 -208 -1320 -288
WIRE -360 -176 -424 -176
WIRE 552 -176 552 -272
WIRE 664 -176 552 -176
WIRE 872 -176 872 -272
WIRE 872 -176 728 -176
WIRE -728 -144 -904 -144
WIRE -616 -144 -648 -144
WIRE -568 -144 -568 -320
WIRE -568 -144 -616 -144
WIRE -424 -144 -424 -176
WIRE -360 -144 -360 -176
WIRE 760 -128 696 -128
WIRE 296 -96 296 -448
WIRE 392 -96 360 -96
WIRE 504 -96 472 -96
WIRE 552 -96 552 -176
WIRE 552 -96 504 -96
WIRE 696 -96 696 -128
WIRE 760 -96 760 -128
WIRE -1320 -64 -1320 -128
WIRE -424 -16 -424 -64
WIRE -616 0 -616 -144
WIRE -456 0 -616 0
WIRE -248 16 -248 -320
WIRE -248 16 -392 16
WIRE -152 16 -248 16
WIRE -56 16 -56 -96
WIRE -56 16 -152 16
WIRE -456 32 -600 32
WIRE 696 32 696 -16
WIRE 504 48 504 -96
WIRE 664 48 504 48
WIRE -152 64 -152 16
WIRE 872 64 872 -176
WIRE 872 64 728 64
WIRE 1016 64 1016 -48
WIRE 1016 64 872 64
WIRE 1112 64 1016 64
WIRE 1320 64 1192 64
WIRE 664 80 520 80
WIRE 1320 96 1320 64
WIRE -600 112 -600 32
WIRE -424 144 -424 48
WIRE 520 160 520 80
WIRE -152 176 -152 144
WIRE 696 192 696 96
WIRE -424 272 -424 224
WIRE -1320 304 -1320 224
WIRE 696 320 696 272
WIRE -1320 448 -1320 384
FLAG -424 272 0
FLAG -360 -144 0
FLAG -1320 448 0
FLAG -600 112 0
FLAG 696 320 0
FLAG 760 -96 0
FLAG 520 160 0
FLAG -56 -96 Out_PreAmp
FLAG 1016 -48 Out_FS
FLAG 1320 96 0
FLAG 296 -448 Input_step
FLAG -1320 224 Input_Muon
FLAG -1320 -64 0
FLAG -1320 -288 Input_step
FLAG -904 -144 Input_step
FLAG -152 176 0
SYMBOL res -632 -160 R90
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res -360 -336 R90
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL voltage -424 -48 R180
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL voltage -424 240 R180
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL OpAmps\\UniversalOpAmp1 -424 16 R0
SYMATTR InstName U1
SYMATTR Value2 Avol=1Meg GBW={GBWP} Vos=0
SYMBOL res 488 -112 R90
SYMATTR InstName R3
SYMATTR Value 500
SYMBOL res 760 -288 R90
SYMATTR InstName R4
SYMATTR Value 25k
SYMBOL voltage 696 0 R180
SYMATTR InstName V4
SYMATTR Value 5
SYMBOL voltage 696 288 R180
SYMATTR InstName V5
SYMATTR Value 5
SYMBOL OpAmps\\UniversalOpAmp1 696 64 R0
SYMATTR InstName U2
SYMATTR Value2 Avol=1Meg GBW={GBWP} Vos=0
SYMBOL voltage -1320 288 R0
SYMATTR InstName V1
SYMATTR Value PWL file=photon_data_2_photons.txt
SYMBOL res 1208 48 R90
SYMATTR InstName R5
SYMATTR Value 100k
SYMBOL cap 360 -112 R90
SYMATTR InstName C1
SYMATTR Value 5p
SYMBOL cap 728 -192 R90
SYMATTR InstName C2
SYMATTR Value 100f
SYMBOL voltage -1320 -224 R0
SYMATTR InstName V6
SYMATTR Value PULSE(0 -10m 20n 0.01n 0.01n 50n 0 1)
SYMBOL res -168 48 R0
SYMATTR InstName R6
SYMATTR Value 10k