Patent · US Expired

Synchronism error detecting and correcting system for a circulating memory

US3989894A · kind A · utility

8Cited by

6References

3Claims

0Family size

Assignee

International Standard Electric Corporation · US

Inventors

Pierre Charransol · Paris, FR
Jacques E. Salle · Colombes, FR
Jacques Becker · Paris, FR

Key dates

Filing date	Dec 13, 1973
Grant date	Nov 2, 1976
Priority date	—
Expiry date	Dec 13, 1993

Classification

Technology area (CPC H)Electricity
CPC primaryH04Q11/06
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A system is disclosed for checking and correcting the synchronism of bits stored in a circulating memory which is part of a PCM switching system. Periodically, bits previously written in an addressable memory are read-out and compared to corresponding bits supplied by the circulating memory. In accordance with results of the comparison, a synchronism signal or a fast or slow correction signal is supplied.

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