Redundancy scheme for multi-stage apparatus

Details Redundancy scheme for multi-stage apparatus Redundancy scheme for multi-stage apparatus

1987-05-19

1989-08-15

Atkinson, Charles E.

Excavating

364737, G06F 1120

Patent

active

048582336

ABSTRACT:
A multi-stage apparatus has an input which is coupled to an output by way of a plurality of first stages. The stages are sequentially coupled together to form a chain. A spare stage, which is substantially identical to at least a selected one of said first stages is also provided. The apparatus also includes programmable logic means arranged to uncouple said selected first stage from said chain and to couple said spare stage into said chain such that the input remains coupled to the output by the same number of stages. In this way a redundancy scheme for the multi-stage apparatus is implemented.

REFERENCES:
patent: 3805039 (1974-04-01), Stiffler
patent: 4245343 (1981-01-01), Frey
patent: 4314349 (1982-02-01), Batcher
patent: 4566102 (1986-01-01), Hefner
patent: 4584682 (1986-04-01), Shah et al.
patent: 4713811 (1987-12-01), Frey
patent: 4720817 (1988-01-01), Childers
patent: 4722084 (1988-01-01), Morton
patent: 4723241 (1988-02-01), Grobel et al.

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