Fast self-recovering controllers

A fast fault-tolerant controller structure is presented which is capable of recovering from transient faults by performing a rollback operation in hardware. The proposed fault-tolerant controller structure utilizes the rollback hardware also for system mode and this way achieves performance improvements of more than 50% compared to controller structures made fault tolerant by conventional techniques, while the hardware overhead is often negligible. The proposed approach is compatible with state-of-the-art methods for FSM decomposition, state encoding and logic synthesis