Fault tolerant computer memory systems and components employing

Details Fault tolerant computer memory systems and components employing Fault tolerant computer memory systems and components employing

1989-03-10

1991-10-15

Smith, Jerry

Excavating

H03M 1300

Patent

active

050581155

ABSTRACT:
In a memory system comprising a plurality of memory units each of which possesses unit-level error correction capabilities and each of which are tied to a system level error correction function, memory reliability is enhanced by providing means for fixing the output of one of the memory units at a fixed value in response to the occurrence of an uncorrectable error in one of the memory units. This counter-intuitive approach to the generation of forced hard errors nonetheless enhances overall memory system reliability since it enables the employment of the complement/recomplement algorithm which depends upon the presence of reproducible errors for proper operation. Thus, clip level error correction systems, which are increasingly desirable at high packaging densities, are employed in a way which does not interfere with system level error correction methods.

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