Excitability in autonomous Boolean networks
  We demonstrate theoretically and experimentally that excitable systems can be built with autonomous Boolean networks. Their experimental implementation is realized with asynchronous logic gates on a reconfigurabe chip. When these excitable systems are assembled into time-delay networks, their dynamics display nanosecond time-scale spike synchronization patterns that are controllable in period and phase. 
David P. Rosin, Damien Rontani, Daniel J. Gauthier, Eckehard Sch\"oll
nlin.AO