Two Approximate Voting Schemes for Reliable Computing - 2017


This paper depends on the principles of inexact computing to alleviate the issues arising in static masking by voting for reliable computing within the nanoscales. Two schemes that utilize in several manners approximate voting, are proposed. The first theme is known as inexact double modular redundancy (IDMR). IDMR will not resort to triplication, so saving overhead because of modular replication. This theme is crudely adaptive in its operation, i.e., it permits a threshold to determine the validity of the module outputs. IDMR operates by initially establishing the distinction between the values of the outputs of the 2 modules; solely if the distinction is below a preset threshold, then the voter calculates the common value of the two module outputs. The second scheme (ITDMR) combines IDMR with TMR (triple modular redundancy) by using novel conditions in the comparison of the outputs of the three modules. Within an inexact framework, the bulk is established using different criteria; in ITDMR, adaptive operation is carried any than IDMR to incorporate approximate voting in a very pairwise fashion. Therefore, the validity of the three inputs is established and when solely two of the 3 inputs satisfy the brink condition, the IDMR operation is used. An extensive analysis that has the voting circuits furthermore a probabilistic framework is included. The proposed IDMR and ITDMR schemes improve the ability dissipation and tolerance to variations compared to a ancient TMR. To further validate the applicability of the proposed schemes, inexact voting has been utilized in two applications (image processing and FIR filtering); the simulation results show that performance is substantially improved over TMR.

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