Creating a 4-Bit Asynchronous Up Counter with Flip Flops

[aruna1]

Homework Statement

guys i have given following question

"Brief out how you realize a 4 bit asynchronous up counter using flip flops."

my english is not good so please explain this question to me (in simple)

Homework Equations

The Attempt at a Solution

 

[wildman]

The third illustration from the top on this web page will do the trick:

http://www.allaboutcircuits.com/vol_4/chpt_11/3.html

 

[aruna1]

The third illustration from the top on this web page will do the trick:

http://www.allaboutcircuits.com/vol_4/chpt_11/3.html

thanks