Version 4
SHEET 1 1372 948
WIRE 464 -384 0 -384
WIRE 816 -384 464 -384
WIRE 1088 -384 816 -384
WIRE 816 -352 816 -384
WIRE 1088 -352 1088 -384
WIRE 336 -320 208 -320
WIRE 464 -320 464 -384
WIRE 464 -320 416 -320
WIRE 0 -304 0 -384
WIRE 208 -304 208 -320
WIRE 560 -240 528 -240
WIRE 656 -240 640 -240
WIRE 688 -240 656 -240
WIRE 816 -240 816 -272
WIRE 816 -240 768 -240
WIRE 1088 -224 1088 -272
WIRE 208 -208 208 -240
WIRE 816 -208 816 -240
WIRE 656 -160 656 -240
WIRE 656 -160 608 -160
WIRE 752 -160 656 -160
WIRE -224 -144 -352 -144
WIRE 208 -112 208 -144
WIRE 528 -112 528 -240
WIRE 528 -112 208 -112
WIRE 544 -112 528 -112
WIRE -224 -80 -224 -144
WIRE 0 -64 0 -224
WIRE 144 -64 0 -64
WIRE -352 -16 -352 -144
WIRE 0 -16 0 -64
WIRE 208 16 208 -16
WIRE 208 16 112 16
WIRE -176 48 -288 48
WIRE 112 48 112 16
WIRE 208 48 208 16
WIRE -224 144 -224 0
WIRE -400 160 -448 160
WIRE -288 160 -288 48
WIRE -288 160 -320 160
WIRE -256 160 -288 160
WIRE -112 176 -112 48
WIRE -112 176 -192 176
WIRE 112 176 112 112
WIRE 112 176 -112 176
WIRE 208 176 208 128
WIRE 208 176 112 176
WIRE 384 176 336 176
WIRE 496 176 464 176
WIRE 608 176 608 -64
WIRE 608 176 560 176
WIRE 816 176 816 -112
WIRE 816 176 608 176
WIRE 928 176 816 176
WIRE 1008 176 928 176
WIRE -256 192 -288 192
WIRE 1008 208 1008 176
WIRE 208 224 208 176
WIRE -400 240 -496 240
WIRE -288 240 -288 192
WIRE -288 240 -320 240
WIRE 0 240 0 48
WIRE 0 240 -64 240
WIRE 112 240 112 176
WIRE -224 272 -224 208
WIRE -496 288 -496 240
WIRE -64 304 -64 240
WIRE 0 304 0 240
WIRE 336 304 336 176
WIRE 112 336 112 304
WIRE 208 336 208 304
WIRE 208 336 112 336
WIRE 1008 336 1008 288
WIRE -288 368 -288 240
WIRE 208 368 208 336
WIRE -496 416 -496 368
WIRE 0 416 0 368
WIRE 144 416 0 416
WIRE 608 416 608 176
WIRE -224 448 -224 352
WIRE 528 464 208 464
WIRE 544 464 528 464
WIRE 816 464 816 176
WIRE 208 496 208 464
WIRE 656 512 608 512
WIRE 752 512 656 512
WIRE 0 544 0 416
WIRE 1088 544 1008 544
WIRE 208 592 208 560
WIRE 528 592 528 464
WIRE 560 592 528 592
WIRE 656 592 656 512
WIRE 656 592 640 592
WIRE 688 592 656 592
WIRE 816 592 816 560
WIRE 816 592 768 592
WIRE 1008 608 1008 544
WIRE 816 624 816 592
WIRE 1088 624 1088 544
WIRE 208 688 208 656
WIRE 352 688 208 688
WIRE 464 688 432 688
WIRE 0 752 0 624
WIRE 464 752 464 688
WIRE 464 752 0 752
WIRE 816 752 816 704
WIRE 816 752 464 752
WIRE 1088 752 1088 704
WIRE 1088 752 816 752
WIRE -288 816 -288 448
WIRE 928 816 928 176
WIRE 928 816 -288 816
FLAG -352 -16 0
FLAG -224 448 0
FLAG -64 304 0
FLAG -448 160 0
FLAG -496 416 0
FLAG 1008 608 0
FLAG 1008 336 0
FLAG 1088 -224 0
FLAG 336 304 0
SYMBOL voltage -224 16 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL voltage -224 368 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL res 192 32 R0
SYMATTR InstName R1
SYMATTR Value 2k
SYMBOL res 192 208 R0
SYMATTR InstName R2
SYMATTR Value 2k
SYMBOL zener 16 48 R180
WINDOW 0 24 64 Left 2
WINDOW 3 -79 29 Left 2
SYMATTR InstName D1
SYMATTR Value 1N750
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL zener 16 368 R180
WINDOW 0 24 64 Left 2
WINDOW 3 -76 29 Left 2
SYMATTR InstName D2
SYMATTR Value 1N750
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL npn 144 -112 R0
SYMATTR InstName Q1
SYMATTR Value 2N5550
SYMBOL pnp 144 464 M180
SYMATTR InstName Q2
SYMATTR Value 2N5401
SYMBOL res -304 144 R90
WINDOW 0 -5 76 VBottom 2
WINDOW 3 -31 33 VTop 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res -304 224 R90
WINDOW 0 70 93 VBottom 2
WINDOW 3 44 54 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res -272 464 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R5
SYMATTR Value 100k
SYMBOL res -16 -320 R0
SYMATTR InstName R6
SYMATTR Value 2k7
SYMBOL res -16 528 R0
SYMATTR InstName R7
SYMATTR Value 2k7
SYMBOL voltage 1088 -368 R0
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 -128 12 Left 2
SYMATTR InstName V3
SYMATTR Value 30
SYMATTR SpiceLine Rser=0.01
SYMBOL voltage 1088 608 R0
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 24 -12 Left 2
SYMATTR InstName V4
SYMATTR Value 30
SYMATTR SpiceLine Rser=0.01
SYMBOL pnp 544 -64 M180
SYMATTR InstName Q3
SYMATTR Value 2N5401
SYMBOL npn 544 416 R0
SYMATTR InstName Q5
SYMATTR Value 2N5550
SYMBOL res 800 -368 R0
SYMATTR InstName R8
SYMATTR Value 0.33
SYMBOL res 800 608 R0
SYMATTR InstName R9
SYMATTR Value 0.33
SYMBOL res 784 -256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 180
SYMBOL res 784 576 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R11
SYMATTR Value 180
SYMBOL res 656 -256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R12
SYMATTR Value 750
SYMBOL res 656 576 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R13
SYMATTR Value 750
SYMBOL diode 192 -208 R0
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL diode 192 -304 R0
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL diode 192 496 R0
SYMATTR InstName D5
SYMATTR Value 1N4148
SYMBOL diode 192 592 R0
SYMATTR InstName D6
SYMATTR Value 1N4148
SYMBOL res 432 -336 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R14
SYMATTR Value 470
SYMBOL res 448 672 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R15
SYMATTR Value 470
SYMBOL res 1024 304 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R16
SYMATTR Value 4
SYMBOL cap 96 48 R0
SYMATTR InstName C1
SYMATTR Value 560
SYMBOL cap 96 240 R0
SYMATTR InstName C2
SYMATTR Value 560
SYMBOL cap -112 32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 22p
SYMBOL voltage -496 272 R0
WINDOW 0 24 96 Left 2
WINDOW 3 -60 140 VLeft 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V5
SYMATTR Value SINE(0 1 100)
SYMBOL Opamps\\LT1055 -224 112 R0
SYMATTR InstName U2
SYMBOL npn 752 560 M180
SYMATTR InstName Q6
SYMATTR Value MJE3055
SYMBOL pnp 752 -112 M180
SYMATTR InstName Q4
SYMATTR Value MJE2955
SYMBOL cap 560 160 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 100n
SYMBOL res 480 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R17
SYMATTR Value 1
TEXT -1376 296 Left 2 !.tran 0.2ms startup
TEXT -1376 -80 Left 2 !.MODEL MJE2955 PNP(Is=66.19f Xti=3 Eg=1.11 Vaf=100 Bf=137.6 Ise=862.2f\n+ Ne=1.481 Ikf=1.642 Nk=.5695 Xtb=2 Br=5.88 Isc=273.5f Nc=1.24\n+ Ikr=3.555 Rc=79.39m Cjc=870.4p Mjc=.6481 Vjc=.75 Fc=.5\n+ Cje=390.1p Mje=.4343 Vje=.75 Tr=235.4n Tf=23.21n Itf=71.33\n+ Xtf=5.982 Vtf=10 Rb=.1)
TEXT -1376 112 Left 2 !.MODEL MJE3055 NPN(Is=457.5f Xti=3 Eg=1.11 Vaf=50 Bf=156.7 Ise=1.346p \n+ Ne=1.34 Ikf=3.296 Nk=.5961 Xtb=2.2 Br=7.639 Isc=604.1f Nc=2.168\n+ Ikr=8.131m Rc=91.29m Cjc=278.7p Mjc=.385 Vjc=.75 Fc=.5 Cje=433p\n+ Mje=.5 Vje=.75 Tr=1.412u Tf=37.34n Itf=35.68 Xtf=1.163 Vtf=10\n+ Rb=.1)
TEXT 16 -32 Left 2 ;4V7
TEXT 16 392 Left 2 ;-4V7