Abstract: The chaos control schemes for a modified version of Chua’s circuit are studied to control the chaotic trajectory to a periodical motion．Applying the extern feedback control method‚we design two different control laws‚and add the input control signals to the first and the third equations respectively．The result shows that‚with appropriate linear control law and appropriate control strength‚we can successfully control the chaotic motion of the circuit．

Key words:  chaos control, modified Chua’s circuit, extern feedback control method