Logic circuit having error detection function, redundant...

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

G - Physics

06

F

G06F 11/20 (2006.01) G05B 13/02 (2006.01) H03K 19/007 (2006.01)

Patent

CA 2117936

A self-checking circuit and a method of its configuration are useful for achieving highly reliable system configuration. A logic circuit having an error detection function has function blocks for feeding out a plurality of signals at least duplexed. The system compares the output signals of the function blocks and detects an error on the basis of the results of the comparison. A synthesizing system superimposes 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 signal output of the synthesizing system with the signal output of the other function block to detect the error. The whole circuit including the function blocks are judged normal only if waveforms inherent to both the output signals exist.

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