Version 4
SHEET 1 1680 1008
WIRE 672 -240 560 -240
WIRE 800 -240 672 -240
WIRE 880 -240 800 -240
WIRE 880 -224 880 -240
WIRE 672 -144 672 -160
WIRE -144 -96 -240 -96
WIRE -48 -96 -64 -96
WIRE 608 -96 560 -96
WIRE 800 -96 800 -240
WIRE 560 -80 560 -96
WIRE 736 -48 672 -48
WIRE 496 -32 416 -32
WIRE 672 -16 672 -48
WIRE -240 0 -240 -16
WIRE -144 0 -240 0
WIRE -64 0 -64 -96
WIRE -240 16 -240 0
WIRE -64 16 -64 0
WIRE -48 16 -64 16
WIRE 800 16 800 0
WIRE 32 32 32 -96
WIRE 32 32 16 32
WIRE 48 32 32 32
WIRE 144 32 128 32
WIRE 240 32 224 32
WIRE 304 32 240 32
WIRE -48 48 -64 48
WIRE 416 48 368 48
WIRE 304 64 272 64
WIRE 32 80 32 32
WIRE 48 80 32 80
WIRE 128 80 128 32
WIRE 128 80 112 80
WIRE 672 80 672 48
WIRE 272 96 272 64
WIRE 560 112 560 96
WIRE 608 112 560 112
WIRE 800 112 800 96
WIRE 992 112 800 112
WIRE 1024 112 992 112
WIRE 800 128 800 112
WIRE 1024 128 1024 112
WIRE -64 144 -64 48
WIRE 560 144 560 112
WIRE 608 144 608 112
WIRE 240 176 240 32
WIRE 304 176 240 176
WIRE 416 176 416 48
WIRE 416 176 368 176
WIRE 672 176 672 144
WIRE 416 192 416 176
WIRE 800 224 800 208
WIRE 1024 240 1024 208
WIRE 496 272 416 272
WIRE 672 272 672 240
WIRE 736 272 672 272
WIRE 608 320 560 320
WIRE 560 336 560 320
WIRE 800 352 800 320
WIRE 896 352 800 352
WIRE 240 368 240 176
WIRE 240 368 176 368
WIRE 896 368 896 352
WIRE 240 384 240 368
WIRE 176 400 176 368
WIRE 672 400 672 368
WIRE 672 480 560 480
WIRE 800 480 800 352
WIRE 800 480 672 480
WIRE 176 496 176 464
WIRE 240 496 240 464
WIRE 240 496 176 496
WIRE 992 496 992 112
WIRE 992 496 240 496
FLAG 608 144 0
FLAG 1024 304 0
FLAG 880 -144 0
FLAG -64 224 0
FLAG 896 448 0
FLAG -256 144 VCC
FLAG 336 16 VCC
FLAG -16 0 VCC
FLAG -160 144 -VCC
FLAG -16 64 -VCC
FLAG 336 80 -VCC
FLAG -240 16 0
FLAG 272 96 0
FLAG -256 224 0
FLAG -160 224 0
FLAG 416 352 -VCC
FLAG 416 -112 VCC
SYMBOL res 576 112 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL res 576 -144 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R5
SYMATTR Value 330
SYMBOL res 688 -144 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R3
SYMATTR Value 33
SYMBOL res 576 496 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R6
SYMATTR Value 330
SYMBOL res 656 384 R0
SYMATTR InstName R4
SYMATTR Value 33
SYMBOL res 784 0 R0
SYMATTR InstName R1
SYMATTR Value 33
SYMBOL res 784 112 R0
SYMATTR InstName R2
SYMATTR Value 33
SYMBOL diode 656 -16 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 656 80 R0
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL diode 544 336 R0
SYMATTR InstName D5
SYMATTR Value 1N4148
SYMBOL diode 544 -160 R0
WINDOW 3 24 64 Invisible 2
SYMATTR Value 1N4148
SYMATTR InstName D4
SYMBOL cap 192 464 R180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C2
SYMATTR Value 1p
SYMBOL cap 1008 240 R0
SYMATTR InstName CL
SYMATTR Value 60n
SYMBOL voltage -64 128 R0
WINDOW 3 24 96 Invisible 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value SINE(1.65 1.65 1000 0 0 0)
SYMATTR InstName V1
SYMBOL voltage 880 -240 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 150
SYMBOL voltage 896 352 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value -150
SYMBOL res 224 368 R0
SYMATTR InstName R13
SYMATTR Value 120k
SYMBOL res 240 16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R14
SYMATTR Value 10k
SYMBOL res 144 16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R15
SYMATTR Value 110k
SYMBOL res -48 -112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R17
SYMATTR Value 10k
SYMBOL res 48 -112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R16
SYMATTR Value 30k
SYMBOL Misc\\jumper 80 144 R180
SYMATTR InstName X1
SYMBOL voltage -256 128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V5
SYMATTR Value 15
SYMBOL voltage -160 128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V6
SYMATTR Value -15
SYMBOL res 1008 112 R0
SYMATTR InstName RL
SYMATTR Value 400
SYMBOL voltage -240 -112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value 3.3
SYMBOL diode 656 176 R0
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL res 576 240 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R8
SYMATTR Value 10k
SYMBOL res 400 -48 R0
SYMATTR InstName R11
SYMATTR Value 3k3
SYMBOL res 400 176 R0
SYMATTR InstName R12
SYMATTR Value 3k3
SYMBOL res 400 -128 R0
SYMATTR InstName R9
SYMATTR Value 3k3
SYMBOL res 400 256 R0
SYMATTR InstName R10
SYMATTR Value 3k3
SYMBOL res -48 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R18
SYMATTR Value 15k
SYMBOL pnp 608 -48 M180
SYMATTR InstName Q3
SYMATTR Value 2N5401
SYMBOL pnp 496 320 M180
SYMATTR InstName Q6
SYMATTR Value 2N5401
SYMBOL npn 608 272 R0
SYMATTR InstName Q4
SYMATTR Value 2N5550
SYMBOL npn 496 -80 R0
SYMATTR InstName Q5
SYMATTR Value 2N5550
SYMBOL npn 736 -96 R0
SYMATTR InstName Q1
SYMATTR Value Qmjd50t4
SYMBOL pnp 736 320 M180
SYMATTR InstName Q2
SYMATTR Value Qmjd5731t4
SYMBOL Opamps\\LT1457 336 48 R0
WINDOW 3 -51 -108 Left 2
SYMATTR InstName U1
SYMBOL Opamps\\LT1457 -16 32 R0
WINDOW 3 74 -81 Left 2
SYMATTR InstName U2
SYMBOL cap 368 160 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1p
TEXT -256 488 Left 2 !.tran 10m
TEXT -16 184 Left 2 ;DAC
TEXT -312 536 Left 2 !.MODEL Qmjd5731t4 pnp\n+IS=1e-09 BF=56.4578 NF=0.85 VAF=10\n+IKF=0.215619 ISE=1e-08 NE=1.35463 BR=0.1\n+NR=0.92774 VAR=21.1019 IKR=2.15619 ISC=1e-08\n+NC=2.80489 RB=11.967 IRB=100 RBM=0.1\n+RE=0.0001 RC=0.168681 XTB=9.56169 XTI=1\n+EG=1.05 CJE=3.13664e-09 VJE=0.647225 MJE=0.35397\n+TF=7.30209e-09 XTF=1.5 VTF=1.00003 ITF=0.999992\n+CJC=3.00305e-10 VJC=0.600058 MJC=0.409743 XCJC=0.8\n+FC=0.534197 CJS=0 VJS=0.75 MJS=0.5\n+TR=1e-07 PTF=0 KF=0 AF=1
TEXT 360 536 Left 2 !.MODEL Qmjd50t4 npn\n+IS=7.25559e-11 BF=26.7185 NF=1.5 VAF=25.4206\n+IKF=6.11331 ISE=4.74986e-12 NE=3.46876 BR=2.67185\n+NR=1.44677 VAR=3.40787 IKR=3.07918 ISC=4.75e-13\n+NC=3.96875 RB=0.911238 IRB=0.1 RBM=0.1\n+RE=0.000647444 RC=0.138596 XTB=0.130702 XTI=1\n+EG=1.13492 CJE=3.02579e-09 VJE=0.649273 MJE=0.351387\n+TF=6.6943e-09 XTF=1.5 VTF=1 ITF=0.999999\n+CJC=3.0004e-10 VJC=0.600008 MJC=0.409967 XCJC=0.8\n+FC=0.534143 CJS=0 VJS=0.75 MJS=0.5\n+TR=1e-07 PTF=0 KF=0 AF=1
TEXT -88 -160 Left 2 ;0..3V3 -> -10..10V
TEXT 304 -160 Left 2 ;X1..12