Question: Q 3 . ( a ) Use a 3 - bit binary Johnson counter and external gates to design a modulo - 6 BCD -

Q3.(a) Use a 3-bit binary Johnson counter and external gates to design a modulo-6 BCD-code binary counter counting 0 to 5. Show the design procedure and give the circuit diagram. 60%
If you could also explain Johnson and Ring counters that would be great.
(b) Draw the logic diagram of a three-bit binary ripple countdown counter using D flip flops.

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