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Unformatted text preview: situations, the logic symbol u is introduced to indicate an unknown logic value. By associating u with a signal, we mean that the signal is 1 or 0, but we are not sure which one is the actual value. Basic Boolean operations for ternary logic (0, 1, and u ) are straightforward. First, the three symbols are viewed as three sets of symbols: 0 as {0}, 1 as {1}, and u as {0, 1}. Then, the outcome of a ternary logic operation is the union of the results obtained by applying the same operation to the elements of the sets; for example, the result of 0 · u is derived as follows: · u = ² ³ · ² ´ 1 ³ = ² · ´ · 1 ³ = ² ´ ³ = ² ³ =...
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This note was uploaded on 05/16/2011 for the course ENGINEERIN mp108 taught by Professor Elbarki during the Spring '08 term at Alexandria University.
 Spring '08
 elbarki
 Impedance

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