Version 4
SHEET 1 928 680
WIRE -512 -16 -576 -16
WIRE -464 -16 -512 -16
WIRE -352 -16 -384 -16
WIRE -320 -16 -352 -16
WIRE -224 -16 -256 -16
WIRE -32 -16 -144 -16
WIRE 80 -16 -32 -16
WIRE -32 0 -32 -16
WIRE 512 16 160 16
WIRE -512 32 -512 -16
WIRE -224 32 -224 -16
WIRE -64 32 -224 32
WIRE 160 64 160 16
WIRE -320 80 -432 80
WIRE -32 80 -32 64
WIRE -32 80 -256 80
WIRE -144 112 -144 -16
WIRE 256 112 208 112
WIRE 400 112 336 112
WIRE 416 112 400 112
WIRE -352 128 -352 -16
WIRE 112 128 64 128
WIRE 336 128 336 112
WIRE 512 128 512 16
WIRE 64 144 64 128
WIRE 256 144 256 112
WIRE 400 144 400 112
WIRE -512 160 -512 112
WIRE -432 160 -432 80
WIRE -432 160 -512 160
WIRE -240 176 -304 176
WIRE -64 192 -64 32
WIRE -16 192 -64 192
WIRE 336 208 336 192
WIRE -512 224 -512 160
WIRE 704 224 704 208
WIRE 704 224 672 224
WIRE 784 224 704 224
WIRE -240 240 -240 176
WIRE -224 240 -240 240
WIRE -144 240 -144 192
WIRE -144 240 -160 240
WIRE -128 240 -144 240
WIRE -32 240 -32 80
WIRE -32 240 -48 240
WIRE 64 240 64 224
WIRE 64 240 -32 240
WIRE -320 256 -320 224
WIRE -320 256 -384 256
WIRE -768 272 -816 272
WIRE -688 272 -704 272
WIRE -560 272 -688 272
WIRE -320 272 -320 256
WIRE -240 272 -240 240
WIRE 128 272 128 176
WIRE 176 272 128 272
WIRE 256 272 256 224
WIRE 288 272 256 272
WIRE 400 272 400 224
WIRE 400 272 368 272
WIRE 512 272 512 208
WIRE 512 272 448 272
WIRE -384 288 -384 256
WIRE 176 288 176 272
WIRE -688 304 -688 272
WIRE 256 304 256 272
WIRE 688 304 672 304
WIRE 784 304 688 304
WIRE 400 320 400 272
WIRE 400 320 352 320
WIRE 688 320 688 304
WIRE 352 336 352 320
WIRE 448 336 448 272
WIRE 512 336 512 272
WIRE -816 352 -816 272
WIRE -544 352 -544 320
WIRE -480 352 -544 352
WIRE 128 352 128 272
WIRE 784 352 624 352
WIRE -480 368 -480 352
WIRE -384 368 -384 352
WIRE -320 368 -320 352
WIRE -320 368 -384 368
WIRE -240 368 -240 352
WIRE -240 368 -320 368
WIRE 624 368 624 352
WIRE 784 368 784 352
WIRE -544 384 -544 352
WIRE -320 384 -320 368
WIRE -144 400 -144 240
WIRE -128 400 -144 400
WIRE -16 400 -16 192
WIRE -16 400 -48 400
WIRE 0 400 -16 400
WIRE 112 400 80 400
WIRE 848 400 848 384
WIRE 848 400 816 400
WIRE 864 400 848 400
WIRE 256 416 256 384
WIRE 256 416 208 416
WIRE 352 432 352 416
WIRE 400 432 352 432
WIRE 448 432 448 416
WIRE 448 432 400 432
WIRE 400 448 400 432
WIRE 624 464 624 448
WIRE 672 464 624 464
WIRE 784 464 784 432
WIRE 784 464 752 464
WIRE -816 480 -816 432
WIRE -688 480 -688 384
WIRE -688 480 -816 480
WIRE -656 480 -688 480
WIRE -544 480 -544 448
WIRE -544 480 -576 480
WIRE -480 480 -480 448
WIRE -480 480 -544 480
WIRE -400 480 -480 480
WIRE -176 480 -320 480
WIRE 624 496 624 464
WIRE 864 496 864 464
WIRE -688 512 -688 480
WIRE 160 512 160 464
WIRE 512 512 512 416
WIRE 512 512 160 512
FLAG 176 288 0
FLAG 400 448 0
FLAG -688 512 0
FLAG 336 208 0
FLAG 416 112 +Va
IOPIN 416 112 Out
FLAG -176 480 Nfb
IOPIN -176 480 In
FLAG 624 496 0
FLAG 864 496 0
FLAG 848 384 Bias
IOPIN 848 384 Out
FLAG 80 -16 Bias
IOPIN 80 -16 In
FLAG -320 384 0
FLAG -576 -16 +Va
IOPIN -576 -16 In
FLAG 688 320 0
FLAG 704 208 Nfb
IOPIN 704 208 Out
SYMBOL ind2 496 224 M180
SYMATTR InstName Lp1
SYMATTR Value 100
SYMATTR Type ind
SYMATTR SpiceLine Ipk=1 Rser=200 Rpar=100k Cpar=1n
SYMBOL ind2 496 432 M180
SYMATTR InstName Lp2
SYMATTR Value 100
SYMATTR Type ind
SYMATTR SpiceLine Ipk=1 Rser=200 Rpar=100k Cpar=1n
SYMBOL ind2 688 320 R180
SYMATTR InstName Ls
SYMATTR Value .3
SYMATTR SpiceLine Ipk=10 Rser=.3
SYMATTR Type ind
SYMBOL res 240 288 R0
WINDOW 0 -24 24 Left 0
WINDOW 3 -34 65 Left 0
SYMATTR InstName R1
SYMATTR Value 100
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 240 128 R0
WINDOW 0 -23 27 Left 0
WINDOW 3 -36 63 Left 0
SYMATTR InstName R2
SYMATTR Value 100
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL voltage 352 320 M0
WINDOW 0 -42 14 Left 0
WINDOW 3 -19 57 Left 0
WINDOW 123 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 480
SYMATTR SpiceLine Rser=10 Cpar=50u
SYMBOL voltage 448 320 M0
WINDOW 0 10 13 Left 0
WINDOW 3 -19 57 Left 0
WINDOW 123 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 900
SYMATTR SpiceLine Rser=10 Cpar=50u
SYMBOL res 384 256 R90
WINDOW 0 16 107 VBottom 0
WINDOW 3 -12 10 VTop 0
SYMATTR InstName R3
SYMATTR Value 470
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 96 384 R90
WINDOW 0 -11 46 VRight 0
WINDOW 3 48 55 VRight 0
SYMATTR InstName R4
SYMATTR Value 1K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -704 288 R0
SYMATTR InstName R6
SYMATTR Value 470K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL polcap -560 384 R0
WINDOW 3 29 65 Left 0
SYMATTR Value 47µ
SYMATTR InstName C1
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=35 Irms=270m Rser=0.34 MTBF=2000 Lser=0 ppPkg=1
SYMBOL res -496 352 R0
WINDOW 0 39 14 Left 0
WINDOW 3 27 49 Left 0
SYMATTR InstName R7
SYMATTR Value 3K9
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -560 464 R90
WINDOW 0 18 100 VBottom 0
WINDOW 3 -11 14 VTop 0
SYMATTR InstName R8
SYMATTR Value 470
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res 384 128 R0
SYMATTR InstName R9
SYMATTR Value 5k
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL polcap 320 128 R0
WINDOW 3 29 65 Left 0
SYMATTR Value 47µ
SYMATTR InstName C2
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=35 Irms=270m Rser=0.34 MTBF=2000 Lser=0 mfg="Nichicon" pn="UPL1V470MPH" type="Al electrolytic" ppPkg=1
SYMBOL res -528 16 R0
WINDOW 0 -38 28 Left 0
WINDOW 3 -44 64 Left 0
SYMATTR InstName R10
SYMATTR Value 470K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -304 464 R90
WINDOW 0 17 108 VBottom 0
WINDOW 3 -11 14 VTop 0
SYMATTR InstName R11
SYMATTR Value 10K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -32 224 R90
WINDOW 0 -3 62 VBottom 0
WINDOW 3 32 65 VTop 0
SYMATTR InstName R12
SYMATTR Value 220K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -32 384 R90
WINDOW 0 -2 60 VBottom 0
WINDOW 3 34 63 VTop 0
SYMATTR InstName R13
SYMATTR Value 220K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL voltage 624 464 M180
WINDOW 0 -47 13 Left 0
WINDOW 3 -16 59 Left 0
WINDOW 123 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 50
SYMATTR SpiceLine Rser=1 Cpar=10u
SYMBOL Robertugo\\Pote 800 336 M0
WINDOW 0 34 35 Left 0
WINDOW 123 84 86 Center 0
WINDOW 3 81 61 Center 0
SYMATTR InstName BiasAdj
SYMATTR Value Rt=10k
SYMBOL res 768 448 R90
WINDOW 0 11 108 VBottom 0
WINDOW 3 -11 14 VTop 0
SYMATTR InstName R14
SYMATTR Value 100K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL polcap 880 464 R180
WINDOW 0 38 31 Left 0
WINDOW 3 25 3 Left 0
SYMATTR InstName C3
SYMATTR Value 47µ
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=35 Irms=270m Rser=0.34 MTBF=2000 Lser=0 mfg="Nichicon" pn="UPL1V470MPH" type="Al electrolytic" ppPkg=1
SYMBOL res -160 96 R0
SYMATTR InstName R15
SYMATTR Value 470K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -256 256 R0
SYMATTR InstName R16
SYMATTR Value 470K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -336 256 R0
WINDOW 0 28 19 Left 0
WINDOW 3 27 49 Left 0
SYMATTR InstName R17
SYMATTR Value 2K2
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL polcap -400 288 R0
WINDOW 3 29 65 Left 0
SYMATTR Value 47µ
SYMATTR InstName C4
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=35 Irms=270m Rser=0.34 MTBF=2000 Lser=0 mfg="Nichicon" pn="UPL1V470MPH" type="Al electrolytic" ppPkg=1
SYMBOL cap -160 224 R90
WINDOW 0 9 54 VBottom 0
WINDOW 3 -16 3 VTop 0
SYMATTR InstName C5
SYMATTR Value 47n
SYMBOL res -368 -32 R90
WINDOW 0 17 108 VBottom 0
WINDOW 3 -11 14 VTop 0
SYMATTR InstName R18
SYMATTR Value 470K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL cap -256 64 R90
WINDOW 0 9 54 VBottom 0
WINDOW 3 -16 3 VTop 0
SYMATTR InstName C6
SYMATTR Value 47n
SYMBOL cap -256 -32 R90
WINDOW 0 9 54 VBottom 0
WINDOW 3 -16 3 VTop 0
SYMATTR InstName C7
SYMATTR Value 47n
SYMBOL cap -48 0 R0
SYMATTR InstName C8
SYMATTR Value 1n
SYMBOL res 768 208 R0
WINDOW 0 -29 29 Left 0
WINDOW 3 -36 63 Left 0
SYMATTR InstName RL
SYMATTR Value 8
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL voltage -816 336 R0
WINDOW 123 0 0 Left 0
WINDOW 39 87 28 VRight 0
WINDOW 0 -15 55 Left 0
WINDOW 3 55 -39 VRight 0
SYMATTR SpiceLine Rser=1k
SYMATTR InstName V4
SYMATTR Value SINE(0 2.8 1k)
SYMBOL cap -704 256 R90
WINDOW 0 9 54 VBottom 0
WINDOW 3 -16 3 VTop 0
SYMATTR InstName C9
SYMATTR Value 10n
SYMBOL res 48 128 R0
WINDOW 0 28 19 Left 0
WINDOW 3 27 49 Left 0
SYMATTR InstName R5
SYMATTR Value 1K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL Valve\\triode -512 272 R0
SYMATTR InstName U1a
SYMATTR SpiceModel 12AT7
SYMBOL Valve\\triode -352 176 M0
SYMATTR InstName U1b
SYMATTR SpiceModel 12AT7
SYMBOL Valve\\Tetrode 160 112 R0
WINDOW 0 -51 -64 Left 0
SYMATTR InstName U2
SYMATTR SpiceModel EL34
SYMBOL Valve\\Tetrode 160 416 M180
WINDOW 0 -47 -59 Left 0
SYMATTR InstName U3
SYMATTR SpiceModel EL34
TEXT 592 152 VRight 0 !K Lp1 Lp2 Ls .9995
TEXT 0 496 Left 0 !.tran 10m
TEXT 248 -32 Left 0 !.fourier 1k V(Nfb)
TEXT -840 272 VRight 0 ;3v max