mt(2)

mt(2) - Name Real Time Computing Systems EE 4770 Midterm...

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Name Real Time Computing Systems EE 4770 Midterm Examination 12 March 1997, 8:40-9:30 CST Alias Problem 1 (33 pts) Problem 2 (34 pts) Problem 3 (33 pts) Exam Total (100 pts) Good Luck!

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Problem 1: A circuit is to be designed to convert temperature x [280 K , 300 K] to voltage H ( x )=( x - 280 K) V 4K using a thermistor having model function H t2 ( x )= R 0 e β/x with β = 3000 K and R 0 =0 . 059 Ω. ( a ) Find a linear thermistor model appropriate to this problem using the method described in class. (In which the change in resistance with temperature (slope of model) matches H t2 at a particular point.) (8 pts) ( b ) Find a linear thermistor model which matches H t2 at 280 K and 300 K. (7 pts) ( c ) Draw the schematic of a circuit that could be used to generate the voltage. Show the sign (but not the value of) of voltage sources used. Show, but do not solve, an equation or equations that can be used to ﬁnd the component values. The equation should be in terms of the ﬁrst linear model function requested above, and should not contain symbols
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mt(2) - Name Real Time Computing Systems EE 4770 Midterm...

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