Solved: (a) Derive the state graph and table for a Mealy

Chapter 14, Problem 14.43

(choose chapter or problem)

(a) Derive the state graph and table for a Mealy sequential circuit that converts a serial stream of bits from Manchester code to NRZ code. Assume that a double frequency clock (Clock2) is available.

(b) Repeat (a) for a Moore sequential circuit.

(c) Draw a timing diagram similar to Figure 14-21(b) for your answer to (a), using the Manchester waveform in Figure 14-21(b) as the input waveform to your circuit. If the input changes occur slightly after the clock edge, indicate places in the output waveform where glitches (false outputs) can occur. If possible, assign the don’t-cares in the output part of your state table to eliminate some of the glitches.

(d) Draw the timing diagram for your answer to (b), using the same input waveform as in (c).