FIGURE 6-10 BCD Ripple Counter
goes from Ito O. the flip-flop is set if 1 = I. is cleared if K = I . is complemented if
1 = K = I. and is left unchanged if 1 = K = O.
To verify that these conditions resu lt in the sequence requ ired by a BCD ripp le counter , it
is necessary to verify that the flip-flop trans itions indeed follow a sequence of states as specified
by