P28_061(1)

P28_061(1) - ( T ) to obtain R s ( T ) = R i i s = (1000...

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61. We denote silicon with subscript s andironw ith i .Le t T 0 =20 .I f R ( T )= R s ( T )+ R i ( T )= R s ( T 0 )[1 + α ( T T 0 )] + R i ( T 0 )[1 + α i ( T T 0 )] =( R s ( T ) 0 α s + R i ( T 0 ) α i ) + (temperature independentterms) is to be temperature-independent, we must require that R s ( T 0 ) α s + R i ( T 0 ) α i =0 . Also note that R s ( T 0 )+ R i ( T 0 )= R = 1000 Ω . We solve for R s ( T 0 )and R
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Unformatted text preview: ( T ) to obtain R s ( T ) = R i i s = (1000 )(6 . 5 10 3 ) 6 . 5 10 3 + 70 10 3 = 85 . 0 , and R i ( T ) = 1000 85 . 0 = 915 ....
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