A simple digital circuit based on the probabilis- tic cellularautomata is proposed whose temporal evolution gen- erates 1/f noiseover many frequency decades. The N cells with internal states form aone-dimensional network and probabilisti- cally interact withnearest-neighbor ones. The internal state of the cell interact withnearest-neighbor ones. The internal state of the simple rules asfollows. When the excitatory signal is applied to the cell in thestable state, the state changes to the unstable state. On the otherhand, when the state is unstable, the state changes to the stablestate, and then the cell generates the excitatory signal.
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