A 4 bit twisted ring counter is a sequential circuit which produces the following sequence of



output values: 0000, 1000, 1100, 1110, 1111, 0111, 0011, 0001 and then repeats. Design a



circuit for a 4 bit twisted ring counter that uses four D flip flops. Draw a state transition



diagram, a state table and a schematic for your circuit. Design an alternate implementation



using just three flip flops and draw a state transition diagram, state table and a schematic



for your circuit. If your designs are extended to implement an n bit twisted ring counter,



how many flip flops are required using each of the two approaches. In what situations



would you prefer the first method? In what situations would you prefer the second?