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Unformatted text preview: regions of Vin
from 0 to Vref.
b. What is the function of the circuit?
c. What is the resolution of the circuit?
d. What is the worst case accuracy of the ranges of Vin (from part a.) when the
resistors are rated to 10%. 2. Using the following circuit of a LVDT, where the shaded area represents a ferromagnetic
rod that can be displaced in the +x or –x directions. Assume all three coils are of equal
inductance. d d R1 +x
+
d R1
 Vin
 Vo
+
R2 x
R2
d d a. Find an expression for Vo as a function of Vin for −d ≤ x ≤ d . Hint: Assume ideal
LVDT and opamp and use KCL. Also assume that the values for resistances R1
and R2 are very large.
V
b. Sketch the ratio o as a function of x...
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 Winter '08
 PeterChen

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