Patent
1991-07-23
1993-04-20
Shaw, Dale M.
395575, G06F 1516
Patent
active
052049523
ABSTRACT:
The invention provides a duplex processor arrangement wherein the processors are only pseudo-synchronized to each other. Each processor is provided with its own independent clock circuit and the two clock circuits operate at the same nominal frequency. A circuit means is provided for periodically forcing a rendezvous between processors whereat a controller circuit ensures that the processors have processed the same information since the last rendezvous. Each processor comprises a match circuit including memory means connected to store address/data information related to instructions performed by the processors. Each match circuit compares the information from the processors and generates an alarm signal upon a mismatch.
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Ayers David J.
Guttman Jacob
Northern Telecom Limited
Shaw Dale M.
Shin C.
Turpin F. P.
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