A Case Study of Self‐Checking Circuits Reliability

Abstract

In this paper, we analyze the reliability of self-checking circuits. A case study is presented in which a fault-tolerant system with duplicated self-checking modules is compared to the TMR version. It is shown that a duplicated self-checking system has a much higher reliability than that of the TMR counterpart. More importantly, the reliability of the self-checking system does not drop as sharply as that of the TMR version. We also demonstrate the trade-offs between hardware complexity and error handling capability of self-checking circuits. Alternative self-checking designs where some hardware redundancies are removed with the lost of fault-secure and/or self-testing properties are also studied.

Single fault masking logic designs with error correcting codes

“…In this case, a multiplexer is needed to switch the known good output to the main output, as shown in Figure 4 [2]. Therefore, the reliability of a duplicated TSC adder is:…”