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CSIT123 (DB425) Computing and Cyber Security Fundamentals
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LOGIC CIRCUIT 3
You are given the following logic circuit.
All the gates are NANDgates, that is
( NOT (AND)) gates
Assuming that (TU1) for M1
· Y=1
· D=1
· E=1
Your task is determining how many combinations of A,B,C, values are possible?
(hint: Try to work the solution backward, starting with last NAND gate that outputs Y
Determine all the possible combinations of A,B,C, that satisfy ( Y=1, D=1, E=1). You must select all that apply amongst the following alternatives
| alternative | A | B | C |
| 1 | 1 | 1 | 1 |
| 2 | 1 | 1 | 0 |
| 3 | 1 | 0 | 1 |
| 4 | 1 | 0 | 0 |
| 5 | 0 | 1 | 1 |
| 6 | 0 | 1 | 0 |
| 7 | 0 | 0 | 1 |
| 8 | 0 | 0 | 0 |