Research On Method Of Bionic Self-repair In Digital Circuit

As digital integrated products are used more widely, requirement for reliability ofdigital circuits is also increasing.The factors of manufacturing defects,environmentalinterference and the like,often cause the circuit to fail ahead of time in theoperation.Thus in order to enhance the reliability of digital circuit,it is necessary tointroduce self-repair mechanism into circuit to allow it have some self-repaircapabilities.When faults occur,digital circuit is capable of self-detecting and repairing inreal-time,to ensue the circuit operates stable and long.The principle of self-healing of living organism is applied into the self-repair ofdigital circuit.Decomposing the circuit into multiple cells which has universalstructure.When fault occurs in any function cell,the stem cells can be configured to anyneeded function to replace the fault cell，thus circuit achieve the goal of repairing thefault itself online in real-time.Based on the principle of bionic self-repair in digital circuit, the model of bionicself-repair circuit is constructed as the architecture of two-dimensional cell-arraycircuit.Circuit cells,signal switching module and control unit are also designed.Then,theself-repair mechanism is applied into the serial communication circuit as the targetcircuit. When the circuit occurs faults, the circuit can use their stem cells with universalstructure to be configured to repair faults and maintain the right function of the circuit.Experimental results indicate that, the circuit designed with self-repair architecturecan be effectively repaired itself in the event of faults,and transfer data correctly.Theability of fault tolerance is enhanced effectively.