A pattern recognizer with a 1-bit output Y accepts a 1-bit input X. Y becomes 1 only if the 1-0-1 pattern is seen at X. The circuit treats the incoming bit stream as overlapping sequences, i.e. the last bit of a previous sequence becomes the first bit of the next sequence. In effect, the circuit looks at the most recent three bits to check against the pattern, like below: X 0010101110100101011 Y 0000101000100001010

Computer Networking: A Top-Down Approach (7th Edition)
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Design a Moore-type circuit for the pattern recognizer described below using D-flipflop.

Show the state diagram and excitation table.

A pattern recognizer with a 1-bit output Y accepts a 1-bit input X. Y becomes 1 only if the 1-0-1
pattern is seen at X. The circuit treats the incoming bit stream as overlapping sequences, i.e.
the last bit of a previous sequence becomes the first bit of the next sequence. In effect, the
circuit looks at the most recent three bits to check against the pattern, like below:
X
0010101110100101011
0000101000100001010
Y
Transcribed Image Text:A pattern recognizer with a 1-bit output Y accepts a 1-bit input X. Y becomes 1 only if the 1-0-1 pattern is seen at X. The circuit treats the incoming bit stream as overlapping sequences, i.e. the last bit of a previous sequence becomes the first bit of the next sequence. In effect, the circuit looks at the most recent three bits to check against the pattern, like below: X 0010101110100101011 0000101000100001010 Y
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