Version 4
SHEET 1 896 980
WIRE -1056 -352 -1056 -368
WIRE -864 -352 -1056 -352
WIRE -128 -352 -864 -352
WIRE 16 -352 -128 -352
WIRE 16 -304 16 -352
WIRE -864 -288 -864 -352
WIRE -128 -256 -128 -352
WIRE 16 -144 16 -224
WIRE -864 -128 -864 -208
WIRE -128 -96 -128 -176
WIRE -48 -96 -128 -96
WIRE -1168 -48 -1168 -368
WIRE -1056 -48 -1056 -352
WIRE 224 -32 224 -368
WIRE -416 -16 -416 -64
WIRE -864 0 -864 -48
WIRE -864 0 -880 0
WIRE -800 0 -864 0
WIRE -640 0 -720 0
WIRE -608 0 -640 0
WIRE -448 0 -528 0
WIRE -304 16 -384 16
WIRE -272 16 -272 -16
WIRE -272 16 -304 16
WIRE -224 16 -272 16
WIRE 16 16 16 -48
WIRE 16 16 -160 16
WIRE 48 16 16 16
WIRE 160 16 128 16
WIRE -448 32 -496 32
WIRE -864 48 -864 0
WIRE -128 80 -128 -96
WIRE -496 96 -496 32
WIRE -384 96 -496 96
WIRE -304 96 -304 16
WIRE -304 96 -320 96
WIRE -496 112 -496 96
WIRE 224 112 224 64
WIRE -416 144 -416 48
WIRE -1168 224 -1168 32
WIRE -1056 224 -1056 32
WIRE -1056 224 -1168 224
WIRE -864 224 -864 128
WIRE -864 224 -1056 224
WIRE -496 224 -496 192
WIRE -496 224 -864 224
WIRE -128 224 -128 160
WIRE -128 224 -496 224
WIRE 224 224 224 192
WIRE 224 224 -128 224
WIRE -1056 240 -1056 224
WIRE -848 272 -896 272
WIRE -640 272 -640 0
WIRE -1024 288 -1136 288
WIRE 224 288 224 224
WIRE -896 304 -896 272
WIRE -1136 320 -1136 288
WIRE -1136 432 -1136 400
WIRE -896 448 -896 384
WIRE -896 448 -912 448
WIRE -640 448 -640 352
WIRE -640 448 -896 448
WIRE 224 448 224 368
WIRE 224 448 -640 448
FLAG -1056 240 0
FLAG -1136 432 0
FLAG -1024 288 Vctrl
FLAG -1056 -368 Vaux+
FLAG -880 0 Vpot
FLAG -1168 -368 Vaux-
FLAG -848 272 +30V
FLAG -912 448 GNDout
FLAG 224 -368 +30V
FLAG -416 -64 Vaux-
FLAG -416 144 Vaux+
FLAG -272 -16 OPVout
SYMBOL res -880 32 R0
SYMATTR InstName Rpot2
SYMATTR Value R=1k*V(Vctrl)
SYMBOL voltage -1136 304 R0
WINDOW 3 -17 193 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 -14 162 Left 0
SYMATTR Value PULSE(0.001 0.999 10ms 20ms 20ms 10ms 60ms)
SYMATTR SpiceLine Rser=0
SYMATTR InstName V1
SYMBOL voltage -1056 -64 R0
WINDOW 123 0 0 Left 0
WINDOW 39 24 132 Left 0
SYMATTR InstName VAux+
SYMATTR Value 5VDC
SYMBOL res -880 -144 R0
SYMATTR InstName Ppot1
SYMATTR Value R=1k*(1-V(Vctrl))
SYMBOL res -704 -16 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res -512 -16 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 47k
SYMBOL res -656 256 R0
SYMATTR InstName R3
SYMATTR Value 68k
SYMBOL Opamps\\LT1037 -416 80 M180
SYMATTR InstName U1
SYMBOL voltage -1168 48 R180
WINDOW 0 -75 122 Left 0
WINDOW 3 -66 9 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 -72 -20 Left 0
SYMATTR InstName VAux1
SYMATTR Value 5VDC
SYMATTR SpiceLine Rser=1m
SYMBOL voltage -896 288 R0
WINDOW 0 49 54 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 24 132 Left 0
SYMATTR InstName VZK
SYMATTR SpiceLine Rser=1m
SYMATTR Value 32
SYMBOL res -512 96 R0
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res 208 272 R0
SYMATTR InstName RLOAD
SYMATTR Value 8
SYMBOL npn 160 -32 R0
SYMATTR InstName Q1
SYMATTR Value FZT849
SYMBOL res 208 96 R0
SYMATTR InstName Rsense
SYMATTR Value 0.1
SYMBOL res 32 32 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName Rb
SYMATTR Value 100
SYMBOL cap -320 80 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C5
SYMATTR Value 270p
SYMBOL pnp -48 -48 M180
SYMATTR InstName Q2
SYMATTR Value BC557C
SYMBOL res 0 -320 R0
SYMATTR InstName R6
SYMATTR Value 80
SYMBOL res -144 64 R0
SYMATTR InstName R7
SYMATTR Value 1k
SYMBOL res -144 -272 R0
SYMATTR InstName R8
SYMATTR Value 1k
SYMBOL diode -160 0 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMBOL res -880 -304 R0
SYMATTR InstName R5
SYMATTR Value 100
TEXT -552 496 Left 0 !.tran 0 70ms 0