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hw05_SLN

# hw05_SLN - ECE 211 HW 5 SOLUTIONS p 1 of 6...

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ECE 211 HW 5 SOLUTIONS p 1 of 6 //home/vdimitrov/9334/0de0f51aefb74ddd6382ca6ca9340d7681e2dda0.doc HW Set 5 – SOLUTIONS 1. For the design example done in lecture, obtain another realization with 2 TTL chips. Identify the chips that you use. One Solution: A = S ( D + W1 + W2 ) Other solutions are also possible.

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ECE 211 HW 5 SOLUTIONS p 2 of 6 2. This problem refers to the design example in lecture. The hardware used to activate the system is changed, and now the statement S is active-High. Redesign the circuit using only TTL gates with this new assertion level, assuming all the other assertion levels do not change. Identify the TTL chips you use in your circuit. Solution: Other solutions are possible.
ECE 211 HW 5 SOLUTIONS p 3 of 6 3. (a) Using only TTL gates in your circuit, realize F = AB’ + CD with F, A, D active-High B, C active-Low . (b) Find, if possible, a realization that requires only one TTL chip. Solution:

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ECE 211 HW 5 SOLUTIONS p 4 of 6 4. A circuit with two modes of operation examines a 3-bit binary number N = b2 b1 b0. In mode 0, the circuit looks for N < 4; in mode 1, it looks for N > 4.
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