Patent · US Expired

Redundancy concept for memory circuits having ROM memory cells

US5986952A · kind A · utility

10Cited by

6References

5Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Roderick McConnell · Munich, DE
Klaus Bernauer · Salzburg, AT
Jochen Breilmann · San Jose, US
Manfred Bromba · Hersbruck, DE
Eckehard Plättner · Hersbruck, DE
Konrad Schönemann · Eppingen, DE

Key dates

Filing date	Dec 3, 1998
Grant date	Nov 16, 1999
Priority date	—
Expiry date	Dec 3, 2018

Classification

Technology area (CPC G)Physics
CPC primaryG11C29/78
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Addressable first units having ROM memory cells, for example word or bit lines, can be replaced by redundant second units having RAM memory cells. This has the advantage that the RAM memory cells can be realized with a smaller area than alternative PROM memory cells. The invention can be applied particularly advantageously to DROM memories.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.