期刊名称：International Journal of Soft Computing & Engineering
电子版ISSN：2231-2307
出版年度：2013
卷号：3
期号：5
页码：129-132
出版社：International Journal of Soft Computing & Engineering
摘要：SRAM based FPGAs are attractive to use in space applications because of more flexibility and reprogram ability. As technology size decreases below nanometer SRAM based FPGAs are more susceptible to radiation. These effects can cause transient or permanent bit flipping on SRAM cells and respectively change the function of logic elements within FPGAs. Fault-masking methodologies are essential, because it is vital for the system to work always properly irrespective of various faults that occurs in Complex digital circuitry. Due to this fact, redundancy techniques, which target fault masking and fault tolerance are in our scope. In this project we are proposing Quadruple Force Decide Redundancy (QFDR) a new approach in fault tolerance for mitigation problems in digital circuits, as simply replicating complete systems in Triple Modular Redundancy (TMR) technique may not be sufficient anymore when especially applies to the space applications, failure rate increases because of second instance occurs before the first one recovers. It QFDR makes SRAM-based FPGAs effectively immune from SEU (Single Event Up-set) mitigation challenges. The proposed QFDR is operated at an abstraction level of CLBs of FPGA. The Quadruple Force Decide Redundancy (QFDR) is a redundant logical structure which quadruplicates logical functions and defines two different Force and Decide rules for different quadruple logic functions based on their level in design and then connects them together using special connection patterns. The complete logic of QFDR is implemented in VHDL. Modelsim Xilinx edition (MXE) will be used for simulation and functional verification. Xilinx ISE will be used for synthesis. Xilinx FPGA board will be used for testing and demonstration of the implemented system
