In the circuit of Figure 5-96, inputs A, B, and C are all initially LOW. Output Y

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In the circuit of Figure 5-96, inputs A, B, and C are all initially LOW. Output Y is supposed to go HIGH only when A, B, and C go HIGH in a certain sequence.

(a) Determine the sequence that will make Y go HIGH.

(b) Explain why the START pulse is needed.

(c) Modify this circuit to use D FFs.


Figure 5-96

A B C J K CLK CLR X J CLK K CLR Y T Start

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Digital Systems Principles And Application

ISBN: 9780134220130

12th Edition

Authors: Ronald Tocci, Neal Widmer, Gregory Moss

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