Ring counter - Wikipedia
A ring counter is a type of counter composed of flip-flops connected into a shift register, with the output of the last flip-flop fed to the input of the first, making a "circular" or "ring" structure. . There are two types of ring counters: A straight ring counter, also known as a one-hot counter, connects the output of the last shift register to the first shift register input and circulates a . . .