It has been known that noise can enhance the temporal regularity of dynamical systems that exhibit a bursting behavior—the phenomenon of coherence resonance. But can the phenomenon be expected for nonbursting chaotic systems? We present a theoretical argument based on the idea of time-scale matching and provide experimental evidence with a chaotic electronic circuit for coherence resonance in nonbursting chaotic systems.

• Received 26 March 2002

DOI:https://doi.org/10.1103/PhysRevE.66.015204