Low-overhead transient fault automatic correction circuit for high speed adder

Abstract

Transient faults in a combinational logic become a major challenge for the VLSI (very large scale integrated circuit) design. As a typical component in the combinational logic, an adder is widely applied to an arithmetic unit. The invention discloses a low-overhead transient fault automatic correction circuit for a high speed adder. According to the structure, through developing the abundant inherent hardware redundancy and time redundancy existing in the adder circuit, automatic correction on the transient faults in the high speed adder can be realized with lower overhead, thus the fault-tolerant area and performance overheads can be obviously reduced; and through combining a fault correction technology based on a C unit and the inherent hardware redundancy and time redundancy, the transient fault correction capacity of the adder can be further enhanced. The adder provided by the invention has preferably compromised area-delay overhead compared with other structures.

Description

technical field [0001] The invention belongs to the field of integrated circuit design, mainly relates to the field of transient fault prevention and recovery of integrated circuit chips, in particular refers to the use of circuit design reinforcement technology to realize automatic correction of transient faults of high-speed adders with low overhead, thereby improving circuit reliability structure and technology. Background technique [0002] Transient faults in integrated circuits are mainly caused by various high-energy particles. When high-energy particles are injected into the integrated circuit, instantaneous charge and discharge will occur, and the charged and discharged charge will be absorbed by the sensitive area, which will cause the logic state of the integrated circuit to change, cause operation errors or output errors, and seriously affect the reliability of the integrated circuit. The high-energy particles that cause transient faults mainly come from the cos...

AI Technical Summary

Problems solved by technology

[0006] Although copy error correction and time-shift error correction technologies reduce the overhead of triple-mode redundancy and solve the problem that dual-mode redundancy can only detect errors but not correct them, they still have large area overhead or delay overhead. Limits the application of both techniques

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