The result is called a ripple counter, which can count to where " n " is the number of bits ( flip-flop stages ) in the counter.
2.
Other methods of counting in Gray code are discussed in a report by R . W . Doran, including taking the output from the first latches of the master-slave flip flops in a binary ripple counter.
3.
Ripple counters suffer from unstable outputs as the overflows " ripple " from stage to stage, but they do find frequent application as dividers for clock signals, where the instantaneous count is unimportant, but the division ratio overall is ( to clarify this, a 1-bit counter is exactly equivalent to a divide by two circuit; the output frequency is exactly half that of the input when fed with a regular train of clock pulses ).
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