Logic circuit having error detection function, redundant resourc

Details Logic circuit having error detection function, redundant resourc Logic circuit having error detection function, redundant resourc

1994-10-14

1998-09-01

Decady, Albert

Excavating

371 671, G06F 702, H04L 100

Patent

active

058022660

ABSTRACT:
A self-checking circuit, which is useful for a highly reliable system configuration, includes a logic circuit having an error detection function. For function blocks for feeding out a plurality of signals that are at least duplexed, the logic circuit compares the output signals of the function blocks, and detects an error on the basis of results of the comparison. The logic circuit comprises synthesizing circuitry provided to superimpose inherent waveforms assigned in advance to the respective output signals of the function blocks onto the output signals of one of the function blocks. The inherent waveforms are orthogonal waveforms generated by an orthogonal waveform generator circuit. The logic circuit also compares the output signals having the superimposed inherent waveforms with the signal output of the other function block to detect an error. The whole circuit including the function blocks are judged normal only if the waveforms inherent to both output signals exist.

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Jean-Charles Fabre "Saturation: Reduced Idleness for Improved Fault Tolerant" 1988 IEEE, pp. 200-205.

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