Three module memory system constructed with symbol-wide memory c

Details Three module memory system constructed with symbol-wide memory c Three module memory system constructed with symbol-wide memory c

Filed on

1986-02-25

Date issued

1987-12-15

Examiner

Fleming, Michael R.

Patent Class

Excavating

Other Related Categories

371 21, G06F 1110

Type

Patent

Status

active

Patent number

047138165

Description

ABSTRACT:
A three module memory system is disclosed wherein a data word of 2.sup.i+1 bits is stored. Half of the data word is stored in each of two memory modules. A third memory module is provided, wherein each of the modules allows for storing symbols of 2.sup.i +1 bits. An error protection code is disclosed which for symbols of five bits has a minimum distance profile of (4, 2, 0) and for symbols of nine or seventeen bits has a minimum distance profile of (6, 2, 0). Thus a single bit error is correctable, a single symbol error is detectable, and up to four arbitrary bit errors are detectable. Also a simple and systematic decoder is disclosed.

REFERENCES:
patent: 4547882 (1985-10-01), Tanner
patent: 4561095 (1985-12-01), Khan
patent: 4562576 (1985-12-01), Ratcliffe
patent: 4569052 (1986-02-01), Cohn
patent: 4604749 (1986-08-01), Shinoda
patent: 4617664 (1986-10-01), Aichelmann et al.

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