* SPICE netlist
V1 +15V 0 15v
V2 0 -15V 15v
XU4 N012 N010 +15V -15V N011 LM741 ;pnba In+)In-)V+)V-)OUT
D5 N010 N011 1N4148
C1 Vcap 0 100n
XU1 N009 out +15V -15V Square LM741 ;pnba In+)In-)V+)V-)OUT
R2 Vcap N010 5k
R3 Square N009 2k
R4 N009 N008 1k
V3 N008 0 7
XU2 Vcap out +15V -15V out LM741 ;pnba In+)In-)V+)V-)OUT
R7 N012 0 10k
R8 Square N012 50k
XU3 N004 N005 +15V -15V N006 LM741 ;pnba In+)In-)V+)V-)OUT
R1 N001 N005 1k
Q1 Vcap N006 N005 0 PNP
XU5 N002 N001 +15V -15V N001 LM741 ;pnba In+)In-)V+)V-)OUT
V4 N002 0 13
D1 N006 N005 1N4148
XU6 N007 N003 +15V -15V N004 LM741 ;pnba In+)In-)V+)V-)OUT
R5 N004 N003 10k
R6 N003 Square 30k
V6 N007 0 9.75
.SUBCKT TL082 1 2 3 4 5
C1 11 12 3.498E-12
C2 6 7 15.00E-12
DC 5 53 DX
DE 54 5 DX
DLP 90 91 DX
DLN 92 90 DX
DP 4 3 DX
EGND 99 0 POLY(2) (3,0) (4,0) 0 .5 .5
FB 7 99 POLY(5) VB VC VE VLP VLN 0 4.715E6 -5E6 5E6 5E6 -5E6
GA 6 0 11 12 282.8E-6
GCM 0 6 10 99 8.942E-9
ISS 3 10 DC 195.0E-6
HLIM 90 0 VLIM 1K
J1 11 2 10 JX
J2 12 1 10 JX
R2 6 9 100.0E3
RD1 4 11 3.536E3
RD2 4 12 3.536E3
RO1 8 5 150
RO2 7 99 150
RP 3 4 2.143E3
RSS 10 99 1.026E6
VB 9 0 DC 0
VC 3 53 DC 2.200
VE 54 4 DC 2.200
VLIM 7 8 DC 0
VLP 91 0 DC 25
VLN 0 92 DC 25
.tran 50m startup
.SUBCKT LM741 1 2 99 50 28
IOS 2 1 20N
R1 1 3 250K
R2 3 2 250K
I1 4 50 100U
R3 5 99 517
R4 6 99 517
Q1 5 2 4 QX
Q2 6 7 4 QX
C4 5 6 60.3614P
I2 99 50 1.6MA
EOS 7 1 POLY(1) 16 49 1E-3 1
R8 99 49 40K
R9 49 50 40K
V2 99 8 1.63
D1 9 8 DX
D2 10 9 DX
V3 10 50 1.63
EH 99 98 99 49 1
G1 98 9 5 6 2.1E-3
R5 98 9 95.493MEG
C3 98 9 333.33P
G3 98 15 9 49 1E-6
R12 98 15 1MEG
C5 98 15 5.3052E-15
G4 98 16 3 49 3.1623E-8
L2 98 17 530.5M
R13 17 16 1K
F6 50 99 POLY(1) V6 450U 1
E1 99 23 99 15 1
R16 24 23 25
D5 26 24 DX
V6 26 22 0.65V
R17 23 25 25
D6 25 27 DX
V7 22 27 0.65V
V5 22 21 0.18V
D4 21 15 DX
V4 20 22 0.18V
D3 15 20 DX
L3 22 28 100P
RL3 22 28 100K

* LTspice schematic (.asc)
Version 4
SHEET 1 2304 1008
WIRE 384 -504 192 -504
WIRE 192 -424 192 -504
WIRE 240 -424 192 -424
WIRE 384 -408 384 -504
WIRE 384 -408 304 -408
WIRE 448 -408 384 -408
WIRE 240 -392 192 -392
WIRE 192 -360 192 -392
WIRE 448 -344 448 -408
WIRE -160 -248 -192 -248
WIRE -32 -248 -80 -248
WIRE 352 -200 128 -200
WIRE 448 -200 448 -264
WIRE 448 -200 352 -200
WIRE 352 -184 352 -200
WIRE 448 -152 448 -200
WIRE 128 -120 128 -200
WIRE 176 -120 128 -120
WIRE -368 -104 -416 -104
WIRE -320 -104 -368 -104
WIRE -192 -104 -192 -248
WIRE -192 -104 -240 -104
WIRE -160 -104 -192 -104
WIRE 352 -104 352 -120
WIRE 352 -104 240 -104
WIRE 384 -104 352 -104
WIRE -32 -88 -32 -248
WIRE -32 -88 -96 -88
WIRE 176 -88 -32 -88
WIRE -160 -72 -208 -72
WIRE 576 -56 448 -56
WIRE 608 -56 576 -56
WIRE 1088 -8 912 -8
WIRE -208 8 -208 -72
WIRE -720 72 -816 72
WIRE 912 72 912 -8
WIRE 960 72 912 72
WIRE 1088 88 1088 -8
WIRE 1088 88 1024 88
WIRE 1120 88 1088 88
WIRE 1152 88 1120 88
WIRE -720 104 -720 72
WIRE -704 104 -720 104
WIRE 800 104 800 88
WIRE 960 104 800 104
WIRE -1088 120 -1088 104
WIRE -1088 120 -1152 120
WIRE -608 120 -640 120
WIRE -1088 136 -1088 120
WIRE -832 136 -880 136
WIRE -720 136 -752 136
WIRE -704 136 -720 136
WIRE -1152 152 -1152 120
WIRE -608 152 -608 120
WIRE -560 152 -608 152
WIRE -512 152 -560 152
WIRE 800 152 800 104
WIRE -880 168 -880 136
WIRE -720 264 -720 136
WIRE -704 264 -720 264
WIRE -608 264 -608 152
WIRE -608 264 -624 264
WIRE 800 264 800 216
WIRE 272 296 0 296
WIRE -144 312 -192 312
WIRE -96 312 -144 312
WIRE 0 376 0 296
WIRE 48 376 0 376
WIRE 160 392 112 392
WIRE 272 392 272 296
WIRE 272 392 224 392
WIRE 304 392 272 392
WIRE 416 392 384 392
WIRE -96 408 -96 392
WIRE 48 408 -96 408
WIRE -96 424 -96 408
FLAG -1152 152 0
FLAG -1088 24 +15V
FLAG -1088 216 -15V
FLAG 80 424 -15V
FLAG 80 360 +15V
FLAG 800 264 0
FLAG 800 88 Vcap
FLAG 416 392 Vcap
FLAG -672 152 -15V
FLAG -672 88 +15V
FLAG -880 248 0
FLAG -560 152 Square
FLAG 992 120 -15V
FLAG 992 56 +15V
FLAG 1120 88 out
FLAG -816 72 out
FLAG -96 504 0
FLAG -144 312 Square
FLAG 208 -72 -15V
FLAG 208 -136 +15V
FLAG 576 -56 Vcap
FLAG 272 -376 -15V
FLAG 272 -440 +15V
FLAG 192 -280 0
FLAG -128 -56 -15V
FLAG -128 -120 +15V
FLAG -208 88 0
FLAG -368 -104 Square
SYMBOL voltage -1088 8 R0
SYMATTR InstName V1
SYMATTR Value 15v
SYMBOL voltage -1088 120 R0
SYMATTR InstName V2
SYMATTR Value 15v
SYMBOL Opamps\\opamp2 80 328 R0
SYMATTR Value LM741
SYMATTR InstName U4
SYMBOL diode 224 376 R90
SYMATTR InstName D5
SYMATTR Value 1N4148
SYMBOL cap 784 152 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL Opamps\\opamp2 -672 56 R0
SYMATTR Value LM741
SYMATTR InstName U1
SYMBOL res 400 376 R90
SYMATTR InstName R2
SYMATTR Value 5k
SYMBOL res -608 248 R90
SYMATTR InstName R3
SYMATTR Value 2k
SYMBOL res -736 120 R90
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL voltage -880 152 R0
SYMATTR InstName V3
SYMATTR Value 7
SYMBOL Opamps\\opamp2 992 24 R0
SYMATTR Value LM741
SYMATTR InstName U2
SYMBOL res -112 408 R0
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL res -112 296 R0
SYMATTR InstName R8
SYMATTR Value 50k
SYMBOL Opamps\\opamp2 208 -168 R0
SYMATTR Value LM741
SYMATTR InstName U3
SYMBOL res 432 -360 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL pnp 384 -56 M180
SYMATTR InstName Q1
SYMBOL Opamps\\opamp2 272 -472 R0
SYMATTR Value LM741
SYMATTR InstName U5
SYMBOL voltage 192 -376 R0
SYMATTR InstName V4
SYMATTR Value 13
SYMBOL diode 368 -120 R180
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL Opamps\\opamp2 -128 -152 R0
SYMATTR Value LM741
SYMATTR InstName U6
SYMBOL res -64 -264 R90
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res -224 -120 R90
SYMATTR InstName R6
SYMATTR Value 30k
SYMBOL voltage -208 -8 R0
SYMATTR InstName V6
SYMATTR Value 9.75