Patent · US Expired

Fuse refresh circuit

US5905687A · kind A · utility

9Cited by

6References

11Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Rudiger Brede · Hohenkirchen, DE
Dominique Savignac · Ismaning, DE
Norbert Wirth · Unterschleißheim, DE

Key dates

Filing date	Aug 1, 1997
Grant date	May 18, 1999
Priority date	—
Expiry date	Aug 1, 2017

Classification

Technology area (CPC G)Physics
CPC primaryG11C29/789
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

The fuse refresh circuit for semiconductor memories has a set circuit for setting a fuse latch circuit. The fuse latch circuit is set by the set circuit in at least one refresh cycle after a voltage supply has been switched on. During the refresh cycle of the fuse latch circuit, the latter is driven with pulses in such a way that the state of the fuse latch circuit is evaluated and only an incorrectly set fuse latch circuit is set to be correct.

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