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# hw19_SLN - ECE 211 HW 19 SOLUTIONS p 1/10...

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ECE 211 HW 19 SOLUTIONS p 1/10 //home/vdimitrov/8653/00b02b9981a6b1c2882f4c4436a3da1594015450.doc HW 19 SOLUTIONS 1. A Moore circuit has two inputs A, B and two outputs Y, Z. The circuit waits for a complete pulse on input A and then outputs one pulse; if B = 0, the pulse appears on the Y output, if B = 1 the pulse appears on Z. (a) Design a State Transition Diagram for this Moore circuit. (b) How many flip-flops do you need to realize your diagram? Solution: (a) (b) Four states, need 2 flip-flops.

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ECE 211 HW 19 SOLUTIONS p 2/10 2. A Moore circuit has two inputs A, B and one output Z. The circuit waits until a complete pulse arrives on A and then outputs pulses until B = 1. A timing diagram example is: Note that in this example, B becomes 1 when Z = 1. But your solution must also work if B becomes 1 when Z = 0. (a) Design a State Transition Diagram for this Moore circuit. (b) How many flip-flops do you need to realize your diagram? Solution: (a) (b) Four states, need 2 flip-flops.
ECE 211 HW 19 SOLUTIONS p 3/10 3. A Moore circuit has one input A and one output Z. The circuit waits until A = 1 and then outputs pulses until A = 0. A timing diagram example is: Note that in this example, A becomes 0 while Z = 1. But your solution must also work if A becomes 0 when Z = 0. (a) Design a State Transition Diagram for this Moore circuit. (b) How many flip-flops do you need to realize your diagram?

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