4.13 A combinational logic circuit has four inputs (A, B, C, and D) and one output Z. The output is 1 iff the input has three consecutive O's or three consecutive 1's. For example, if A = 1, B = 0, C = 0, and D = 0, then Z = 1, but if A = 0, B = 1, C = 0, and D = 0, then Z = 0. Design the circuit using one four-input OR gate and four three-input AND gates.

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4.13 A combinational logic circuit has four inputs (A, B, C, and D) and one output Z.
The output is 1 iff the input has three consecutive O's or three consecutive 1's. For
example, if A = 1, B = 0, C = 0, and D = 0, then Z = 1, but if A = 0, B = 1, C = 0,
and D = 0, then Z = 0. Design the circuit using one four-input OR gate and four
three-input AND gates.
4.14 Design a combinational logic circuit which has one output Z and a 4-bit input
ABCD representing a binary number. Z should be 1 iff the input is at least 5, but is
no greater than 11. Use one OR gate (three inputs) and three AND gates (with no
more than three inputs each).
Transcribed Image Text:4.13 A combinational logic circuit has four inputs (A, B, C, and D) and one output Z. The output is 1 iff the input has three consecutive O's or three consecutive 1's. For example, if A = 1, B = 0, C = 0, and D = 0, then Z = 1, but if A = 0, B = 1, C = 0, and D = 0, then Z = 0. Design the circuit using one four-input OR gate and four three-input AND gates. 4.14 Design a combinational logic circuit which has one output Z and a 4-bit input ABCD representing a binary number. Z should be 1 iff the input is at least 5, but is no greater than 11. Use one OR gate (three inputs) and three AND gates (with no more than three inputs each).
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