* SPICE netlist
V1 VCC2 0 15
V4 0 VEE2 15
VIN1 N010 0 PULSE(-5 5 0 100n 100n 0.2ms 0.4ms 7)
R9 VCC2 P001 1.7k
J1 N007 N010 N011 NJFEx140
J2 N008 VOUT N012 NJFEx140
I3 N009 VEE2 1mA
R2 VCC2 N001 1.7k
Q4 N004 N006 N007 0 2N3904
Q7 N003 N006 N008 0 2N3904
D3 N009 N006 BZX84
C1 N006 N009 10n
C2 N005 N004 50p
R1 VOUT N005 0.1R
R3 VCC2 N002 250k
Q1 N004 N002 P001 0 2N3906
Q2 N003 N002 N001 0 2N3906
R4 N011 N009 1k
R5 N012 N009 1k
C3 0 N003 1p
XU1 N003 N004 VCC2 VEE2 VOUT ADA4625-1 ;pnba In+)In-)V+)V-)OUT
Q3 N006 N003 N002 0 2N3906
.tran 3ms

* LTspice schematic (.asc)
Version 4
SHEET 1 1264 1152
WIRE -72 -512 -216 -512
WIRE 72 -512 -72 -512
WIRE 184 -512 72 -512
WIRE 280 -512 184 -512
WIRE -552 -480 -632 -480
WIRE -632 -464 -632 -480
WIRE -552 -464 -552 -480
WIRE 152 -432 72 -432
WIRE -56 -384 -152 -384
WIRE 8 -384 -56 -384
WIRE -72 -368 -72 -432
WIRE -56 -368 -56 -384
WIRE -56 -368 -72 -368
WIRE -72 -320 -72 -368
WIRE 72 -272 72 -336
WIRE 72 -272 -8 -272
WIRE -216 -192 -216 -336
WIRE 248 -192 -216 -192
WIRE 312 -192 248 -192
WIRE 488 -176 376 -176
WIRE 584 -176 488 -176
WIRE 632 -176 584 -176
WIRE 72 -160 72 -272
WIRE 312 -160 72 -160
WIRE 72 -96 72 -160
WIRE -216 -48 -216 -192
WIRE 72 -48 72 -96
WIRE 248 -16 248 -192
WIRE 328 -16 248 -16
WIRE 408 -16 392 -16
WIRE 488 -16 488 -176
WIRE -72 0 -72 -224
WIRE -72 0 -152 0
WIRE 8 0 -72 0
WIRE -72 112 -72 0
WIRE -8 112 -72 112
WIRE -216 128 -216 48
WIRE 72 128 72 48
WIRE -8 176 -72 176
WIRE -264 192 -456 192
WIRE 488 192 488 -16
WIRE 488 192 120 192
WIRE -216 256 -216 224
WIRE 72 256 72 224
WIRE -216 400 -216 336
WIRE -72 400 -72 176
WIRE -72 400 -216 400
WIRE 72 400 72 336
WIRE 72 400 -72 400
WIRE -72 496 -72 400
WIRE -72 576 -136 576
WIRE 216 576 -72 576
WIRE 328 576 216 576
FLAG -552 -464 0
FLAG -632 -560 VCC2
FLAG -632 -384 VEE2
FLAG 184 -512 VCC2
FLAG 216 576 VEE2
FLAG -456 272 0
FLAG 584 -176 VOUT
FLAG 344 -208 VCC2
FLAG 344 -144 VEE2
FLAG 136 -96 0
SYMBOL voltage -632 -576 R0
SYMATTR Value 15
SYMATTR InstName V1
SYMBOL voltage -632 -480 R0
SYMATTR InstName V4
SYMATTR Value 15
SYMBOL voltage -456 176 R0
SYMATTR Value PULSE(-5 5 0 100n 100n 0.2ms 0.4ms 7)
SYMATTR InstName VIN1
SYMBOL res -232 -528 R0
SYMATTR InstName R9
SYMATTR Value 1.7k
SYMBOL njf -264 128 R0
SYMATTR InstName J1
SYMATTR Value NJFEx140
SYMBOL njf 120 128 M0
SYMATTR InstName J2
SYMATTR Value NJFEx140
SYMBOL current -72 496 R0
SYMATTR Value 1mA
SYMATTR InstName I3
SYMBOL res 56 -528 R0
SYMATTR InstName R2
SYMATTR Value 1.7k
SYMBOL npn -152 -48 M0
SYMATTR InstName Q4
SYMATTR Value 2N3904
SYMBOL npn 8 -48 R0
SYMATTR InstName Q7
SYMATTR Value 2N3904
SYMBOL diode -56 176 R180
SYMATTR InstName D3
SYMATTR Value BZX84
SYMBOL cap -24 112 R0
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL cap 392 -32 R90
SYMATTR InstName C2
SYMATTR Value 50p
SYMBOL res 504 -32 R90
SYMATTR InstName R1
SYMATTR Value 0.1R
SYMBOL res -88 -528 R0
SYMATTR InstName R3
SYMATTR Value 250k
SYMBOL pnp -152 -336 R180
SYMATTR InstName Q1
SYMATTR Value 2N3906
SYMBOL pnp 8 -336 M180
SYMATTR InstName Q2
SYMATTR Value 2N3906
SYMBOL res -232 240 R0
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL res 56 240 R0
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL cap 136 -112 R90
SYMATTR InstName C3
SYMATTR Value 1p
SYMBOL OpAmps\\ADA4625 344 -240 R0
SYMATTR InstName U1
SYMBOL pnp -8 -224 R180
SYMATTR InstName Q3
SYMATTR Value 2N3906