PHYS345 Electricity and Electronics

Construct a 2-bit counter with a sequence of states 00, 01, 11, and 10 using D flip-flops and NAND gates. Include an enable function. The truth table is:

Q2 Q1 E   D2 D1
0 0 0   0 0
0 1 0   0 1
1 1 0   1 1
1 0 0   1 0
 
0 0 1   0 1
0 1 1   1 1
1 1 1   1 0
1 0 1   0 0


"http://www.physics.udel.edu/~watson/phys345/class/19-counter-truthtable.html"
Last updated Nov. 10, 1998.
Copyright George Watson, Univ. of Delaware, 1998.