Version 4
SHEET 1 1028 680
WIRE 16 0 -48 0
WIRE 160 0 96 0
WIRE 208 0 160 0
WIRE 352 0 288 0
WIRE 224 144 224 128
WIRE 160 160 160 0
WIRE 192 160 160 160
WIRE 352 176 352 0
WIRE 352 176 256 176
WIRE 32 192 -112 192
WIRE 192 192 112 192
WIRE -112 208 -112 192
WIRE 224 224 224 208
WIRE -112 320 -112 288
WIRE 128 368 128 352
WIRE 224 368 224 352
WIRE 128 480 128 448
WIRE 224 480 224 448
FLAG -48 0 0
FLAG -112 320 0
FLAG 224 128 +V
FLAG 224 224 -V
FLAG 128 480 0
FLAG 224 480 0
FLAG 128 352 +V
FLAG 224 352 -V
SYMBOL Opamps\\UniversalOpamp2 224 176 R0
SYMATTR InstName U1
SYMBOL voltage -112 192 R0
SYMATTR InstName V1
SYMATTR Value 0.1
SYMBOL bv 128 192 R90
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName B1
SYMATTR Value V=(TEMP-25)*TK1
SYMBOL res 192 16 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
WINDOW 123 -50 53 VTop 2
SYMATTR InstName R1
SYMATTR Value RMOD2 90k
SYMBOL res 0 16 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 -31 56 VBottom 2
WINDOW 123 -30 55 VTop 2
SYMATTR InstName R2
SYMATTR Value RMOD1
SYMATTR Value2 10k
SYMBOL voltage 128 352 R0
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL voltage 224 352 R0
SYMATTR InstName V3
SYMATTR Value -15
TEXT -56 -304 Left 2 !.param TK1=10u
TEXT -56 -264 Left 2 !.STEP TEMP 0 50 1
TEXT -56 -232 Left 2 !.op
TEXT -16 -64 Left 2 ;+100ppm/°C
TEXT 192 -64 Left 2 ;-100ppm/°C
TEXT 160 -304 Left 2 ;10uV/°C
TEXT -48 -176 Left 2 !.model RMOD1 R(Tnom=25 TC1=-100u)
TEXT -48 -144 Left 2 !.model RMOD2 R(Tnom=25 TC1=+100u)