Version 4
SHEET 1 900 680
WIRE -160 -64 -304 -64
WIRE -160 -32 -160 -64
WIRE -304 48 -304 -64
WIRE -160 80 -160 48
WIRE -16 80 -160 80
WIRE 32 80 -16 80
WIRE -160 112 -160 80
WIRE -16 112 -16 80
WIRE -304 224 -304 128
WIRE -160 224 -160 192
WIRE -160 224 -304 224
WIRE -16 224 -16 192
WIRE -16 224 -160 224
WIRE -304 240 -304 224
FLAG -304 240 0
FLAG 32 80 RT
SYMBOL res -32 96 R0
SYMATTR InstName RNTC
SYMATTR Value R=R25*exp(B*(1/(TEMPC+KELVIN)-1/(25+KELVIN)))
SYMBOL res -176 -48 R0
SYMATTR InstName R2
SYMATTR Value 2.2k
SYMBOL voltage -304 32 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL res -176 96 R0
SYMATTR InstName R3
SYMATTR Value 1g
TEXT -304 296 Left 2 !.param B=3950 R25=4.7k
TEXT -304 336 Left 2 !.step param TEMPC -5 125 1
TEXT -304 376 Left 2 !.op
TEXT 16 208 Left 2 ;T=B/(log(R/R25)+B/(25+Kelvin))-Kelvin
TEXT -288 -136 Left 2 ;V1: 5V-Reference
LINE Normal -112 112 -208 192
LINE Normal -128 192 -208 112