Self-checking digital fault detector for modular redundant real

Details Self-checking digital fault detector for modular redundant real Self-checking digital fault detector for modular redundant real

1985-09-03

1987-07-28

Atkinson, Charles E.

Excavating

371 61, G06F 1118

Patent

active

046835709

ABSTRACT:
A self-checking detector for detecting faults in a multiple redundant clock system includes a majority voter circuit for receiving the clock signals from the redundant clock circuits and for providing a voted output, a comparison circuit for comparing each of the clock signals with the voted output, and failure signal producing circuits responsive to the outputs from the comparison circuit for producing a first failure signal upon a clock failure being detected and for producing a second failure signal upon a failure of the majority voter being detected. The detector further includes power-up reset circuitry for inhibiting its operation during a power-up interval, and a reset circuit enabling either automatic or manual reset of the detector for verification of the detected fault.

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