On-line detection of random voltage perturbations in buses with multiple-threshold receivers

Random voltage changes on bus lines may lead to reading corrupted digital data. A novel methodology for detecting such anomalies is proposed. It uses multiple threshold voltages at the receiver-end. In our earlier work we have shown that multiple voltage thresholds improve the performance along buses, especially when they are coupled as is often the case in deep-submicron. This work shows that multiple thresholds can also be used to identify voltage perturbations on-line. The mechanism is presented assuming that each line can have only one aggressor. The efficiency of the methodology is evaluated for perturbations in single and multiple receiving nodes of a data bus.