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Unformatted text preview: In other words, write an
equation with value 1 when the inputs are any one of the six unused bit combinations in the BCD code, and
value 0 otherwise.
Solution: 1 3. design a circuit with a 4-bit BCD input A, B , C , D that produces an output W , X , Y , Z that is equal to
the input +6 in binary. For example if the input is 9 (1001 in binary), then the output must be 9 + 6 = 15
(1001 + 0110 = 1111 in binary). The output for invalid BCD codes are don’t cares.
Solution: 4. Design a circuit to implement the following pair of Boolean equations:
F = A(C E + D E ) + A D F = B (C E + D E ) + B C To simplify drawing the circuit schematic, ﬁrst deﬁne the circuit component W = X Z + Y Z , and implement
(draw) the component with two AND gates, an OR gate, and an invert...
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This document was uploaded on 03/01/2014 for the course ECE 25 at UCSD.
- Fall '08