How Johnson Counter Works? Animation

Johnson Counter with Timing diagram

A Johnson counter is a modified ring counter, where the output from the last stage is inverted and fedback as input to the first stage. A pattern of bits equal in length to twice the length of the shift registerthus circulates indefinitely. These counters find specialist applications, including those similar to the decade counter, digital to analog conversion, etc. it can be established by D flip flop and JK flip flop.