Version 4
SHEET 1 1932 680
WIRE 448 -288 320 -288
WIRE 560 -288 528 -288
WIRE 816 -288 560 -288
WIRE 320 -272 320 -288
WIRE 560 -272 560 -288
WIRE 816 -272 816 -288
WIRE 560 -192 560 -208
WIRE 704 -192 688 -192
WIRE 944 -192 928 -192
WIRE 320 -176 320 -192
WIRE 704 -112 592 -112
WIRE 944 -112 928 -112
WIRE 592 -96 592 -112
WIRE 240 -48 240 -64
WIRE 704 -32 672 -32
WIRE 944 -32 928 -32
WIRE 592 0 592 -16
WIRE 672 0 672 -32
WIRE 672 0 592 0
WIRE 240 48 240 32
WIRE 592 112 592 0
WIRE 816 112 816 96
WIRE 592 208 592 192
FLAG 592 208 0
FLAG 240 48 0
FLAG 240 -64 tempC
FLAG 320 -176 0
FLAG 816 112 0
FLAG 560 -192 0
FLAG 688 -192 0
SYMBOL res 576 96 R0
SYMATTR InstName R1
SYMATTR Value R=10K*exp(3490/(V(tempC)+273) - 3490/298)
SYMBOL voltage 240 -64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PWL(0 0 300 80)
SYMBOL voltage 320 -288 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value PWL(0 0 1 10)
SYMBOL res 544 -304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 1K
SYMBOL res 576 -112 R0
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL cap 544 -272 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMBOL PowerProducts\\LTC4070 816 -64 R0
SYMATTR InstName U1
TEXT 1168 224 Left 2 !.tran 300