* SPICE netlist
Q1 N008 N006 N002 0 2N3906
Q3 N006 N002 VCC 0 2N3906
R6 VCC N002 1k
V1 VCC 0 6
R8 N006 VEE 20k
Q5 N003 N008 PRIM1 0 2N3904
Q6 N019 N016 PRIM1 0 2N3906
VIN1 N014 0 PULSE(-3.3 3.3 0 100n 100n 0.2ms 0.4ms 14)
R14 N014 N010 10k
D1 N008 N013 D
D2 N013 N016 D
C1 PRIM1 N010 1n
R3 VCC N003 270
R4 N019 VEE 270
Q10 PRIM1 N003 VCC 0 MJE15035
Q11 PRIM1 N019 VEE 0 MJE15034
XU1 N018 N010 VCC VEE N016 LT1006 ;pnba In+)In-)V+)V-)OUT
Q2 N009 N007 N005 0 2N3906
Q4 N007 N005 VCC 0 2N3906
R1 VCC N005 1k
R2 N007 VEE 20k
Q7 N004 N009 PRIM2 0 2N3904
Q8 N020 N017 PRIM2 0 2N3906
R10 PRIM2 N015 5k
D3 N009 P001 D
D4 P001 N017 D
R13 VCC N004 270
R15 N020 VEE 270
Q9 PRIM2 N004 VCC 0 MJE15035
Q12 PRIM2 N020 VEE 0 MJE15034
R16 N001 0 200R
XU2 0 N015 VCC VEE N017 LT1006 ;pnba In+)In-)V+)V-)OUT
R17 N015 PRIM1 5k
L1 PRIM2 PRIM1 1m
L2 0 N001 8m
V2 0 VEE 6
D5 N010 N012 1N4148
R5 0 N012 10k
R7 N012 PRIM1 8k
R9 N011 PRIM1 8k
D6 N011 N010 1N4148
R11 0 N011 10k
D7 NC_01 NC_02 1N750
VIN2 N018 0 0
.tran 6ms
.include standard.bjt
K L1 L2 0.99

* LTspice schematic (.asc)
Version 4
SHEET 1 2672 1024
WIRE -792 -416 -936 -416
WIRE 1320 -336 1096 -336
WIRE -392 -320 -568 -320
WIRE -328 -320 -392 -320
WIRE -200 -320 -328 -320
WIRE -56 -320 -200 -320
WIRE 472 -320 328 -320
WIRE 568 -320 472 -320
WIRE 664 -320 568 -320
WIRE 840 -320 664 -320
WIRE -568 -288 -568 -320
WIRE -56 -288 -56 -320
WIRE 328 -288 328 -320
WIRE 840 -288 840 -320
WIRE 1096 -288 1096 -336
WIRE 1320 -288 1320 -336
WIRE -392 -240 -504 -240
WIRE -120 -240 -200 -240
WIRE 472 -240 392 -240
WIRE 776 -240 664 -240
WIRE -456 -192 -568 -192
WIRE 840 -192 728 -192
WIRE 1096 -144 1096 -208
WIRE 1320 -144 1320 -208
WIRE 1320 -144 1096 -144
WIRE -200 -80 -200 -240
WIRE 472 -80 472 -240
WIRE 1320 -64 1320 -144
WIRE -392 -32 -392 -144
WIRE -264 -32 -392 -32
WIRE 664 -32 664 -144
WIRE 664 -32 536 -32
WIRE -808 -16 -1080 -16
WIRE -712 -16 -744 -16
WIRE -56 16 -56 -192
WIRE -56 16 -200 16
WIRE 328 16 328 -192
WIRE 472 16 328 16
WIRE -1080 32 -1080 -16
WIRE -1016 32 -1080 32
WIRE -920 32 -952 32
WIRE -392 48 -392 32
WIRE -56 96 -56 16
WIRE 56 96 -56 96
WIRE 104 96 56 96
WIRE 264 96 184 96
WIRE 328 96 328 16
WIRE 328 96 264 96
WIRE -1176 160 -1288 160
WIRE -1080 160 -1080 32
WIRE -1080 160 -1096 160
WIRE -1016 160 -1080 160
WIRE -920 160 -920 112
WIRE -920 160 -952 160
WIRE -712 160 -712 64
WIRE -712 160 -920 160
WIRE -648 160 -712 160
WIRE 824 160 808 160
WIRE 952 160 904 160
WIRE 1000 160 952 160
WIRE 1192 160 1080 160
WIRE 1240 160 1192 160
WIRE -56 240 -56 96
WIRE -56 240 -200 240
WIRE 328 240 328 96
WIRE 472 240 328 240
WIRE -1080 272 -1080 160
WIRE -1048 272 -1080 272
WIRE 952 272 952 160
WIRE 952 272 920 272
WIRE -392 288 -392 112
WIRE -392 288 -984 288
WIRE -296 288 -392 288
WIRE -264 288 -296 288
WIRE 568 288 536 288
WIRE 664 288 664 96
WIRE 664 288 568 288
WIRE 856 288 664 288
WIRE -1048 304 -1080 304
WIRE 1032 304 920 304
WIRE -1080 352 -1080 304
WIRE -296 368 -296 288
WIRE 568 368 568 288
WIRE -56 384 -56 240
WIRE 328 384 328 240
WIRE -200 432 -200 336
WIRE -200 432 -296 432
WIRE -120 432 -200 432
WIRE 472 432 472 336
WIRE 472 432 392 432
WIRE 568 432 472 432
WIRE -344 512 -392 512
WIRE -200 512 -344 512
WIRE -56 512 -56 480
WIRE -56 512 -200 512
WIRE 328 512 328 480
WIRE 472 512 328 512
WIRE 600 512 472 512
WIRE 712 512 600 512
FLAG -936 -496 VCC
FLAG 56 96 PRIM1
FLAG -1288 240 0
FLAG -328 -320 VCC
FLAG -648 160 PRIM1
FLAG -792 -416 0
FLAG -1080 432 0
FLAG -1016 256 VCC
FLAG 264 96 PRIM2
FLAG 568 -320 VCC
FLAG 888 256 VCC
FLAG 1192 160 PRIM2
FLAG 1032 304 0
FLAG 1320 -64 0
FLAG -936 -336 VEE
FLAG -344 512 VEE
FLAG 600 512 VEE
FLAG -1016 320 VEE
FLAG 888 320 VEE
FLAG -568 -112 VEE
FLAG 840 -112 VEE
FLAG -712 -96 0
FLAG -920 -48 0
FLAG 808 160 PRIM1
SYMBOL pnp -456 -144 M180
SYMATTR InstName Q1
SYMATTR Value 2N3906
SYMBOL pnp -504 -192 R180
SYMATTR InstName Q3
SYMATTR Value 2N3906
SYMBOL res -376 -336 M0
SYMATTR InstName R6
SYMATTR Value 1k
SYMBOL voltage -936 -512 R0
SYMATTR Value 6
SYMATTR InstName V1
SYMBOL res -552 -208 M0
SYMATTR InstName R8
SYMATTR Value 20k
SYMBOL npn -264 -80 R0
SYMATTR InstName Q5
SYMATTR Value 2N3904
SYMBOL pnp -264 336 M180
SYMATTR InstName Q6
SYMATTR Value 2N3906
SYMBOL voltage -1288 144 R0
SYMATTR Value PULSE(-3.3 3.3 0 100n 100n 0.2ms 0.4ms 14)
SYMATTR InstName VIN1
SYMBOL res -1192 176 R270
SYMATTR InstName R14
SYMATTR Value 10k
SYMBOL diode -408 -32 R0
SYMATTR InstName D1
SYMBOL diode -408 48 R0
SYMATTR InstName D2
SYMBOL cap -952 144 R90
SYMATTR InstName C1
SYMATTR Value 1n
SYMBOL res -216 -336 R0
SYMATTR InstName R3
SYMATTR Value 270
SYMBOL res -216 416 R0
SYMATTR InstName R4
SYMATTR Value 270
SYMBOL pnp -120 -192 M180
SYMATTR InstName Q10
SYMATTR Value MJE15035
SYMBOL npn -120 384 R0
SYMATTR InstName Q11
SYMATTR Value MJE15034
SYMBOL OpAmps\\LT1006 -1016 224 R0
SYMATTR InstName U1
SYMBOL pnp 728 -144 R180
SYMATTR InstName Q2
SYMATTR Value 2N3906
SYMBOL pnp 776 -192 M180
SYMATTR InstName Q4
SYMATTR Value 2N3906
SYMBOL res 648 -336 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 824 -208 R0
SYMATTR InstName R2
SYMATTR Value 20k
SYMBOL npn 536 -80 M0
SYMATTR InstName Q7
SYMATTR Value 2N3904
SYMBOL pnp 536 336 R180
SYMATTR InstName Q8
SYMATTR Value 2N3906
SYMBOL res 1096 176 M270
SYMATTR InstName R10
SYMATTR Value 5k
SYMBOL diode 680 -32 M0
SYMATTR InstName D3
SYMBOL diode 680 32 M0
SYMATTR InstName D4
SYMBOL res 488 -336 M0
SYMATTR InstName R13
SYMATTR Value 270
SYMBOL res 488 416 M0
SYMATTR InstName R15
SYMATTR Value 270
SYMBOL pnp 392 -192 R180
SYMATTR InstName Q9
SYMATTR Value MJE15035
SYMBOL npn 392 384 M0
SYMATTR InstName Q12
SYMATTR Value MJE15034
SYMBOL res 1336 -304 M0
SYMATTR InstName R16
SYMATTR Value 200R
SYMBOL OpAmps\\LT1006 888 224 M0
SYMATTR InstName U2
SYMBOL res 920 176 M270
SYMATTR InstName R17
SYMATTR Value 5k
SYMBOL ind2 200 80 R90
SYMATTR InstName L1
SYMATTR Value 1m
SYMATTR Type ind
SYMBOL ind2 1112 -192 R180
SYMATTR InstName L2
SYMATTR Value 8m
SYMATTR Type ind
SYMBOL voltage -936 -432 R0
SYMATTR Value 6
SYMATTR InstName V2
SYMBOL diode -1016 48 R270
SYMATTR InstName D5
SYMATTR Value 1N4148
SYMBOL res -936 -64 R0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res -936 16 R0
SYMATTR InstName R7
SYMATTR Value 8k
SYMBOL res -728 -32 R0
SYMATTR InstName R9
SYMATTR Value 8k
SYMBOL diode -744 -32 R90
SYMATTR InstName D6
SYMATTR Value 1N4148
SYMBOL res -728 -112 R0
SYMATTR InstName R11
SYMATTR Value 10k
SYMBOL zener -1336 -256 R90
SYMATTR InstName D7
SYMATTR Value 1N750
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL voltage -1080 336 R0
SYMATTR Value 0
SYMATTR InstName VIN2