Apparatus for management, comparison, and correction of redundant digital data
US4995040A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Feb 3, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B9/03
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A fault tolerant, fail-active computer system comprises a Redundancy Management Unit (RMU) and a plurality of Dual-Port Message Buffers (DPBs) connecting each of a corresponding plurality of communication channels to the RMU. Each DPB includes a message channel interface, a dual-port RAM, a word counter, a page FIFO, a message header FIFO, and a message buffer control circuit. The RMU includes word comparators, 3-state gates, a message comparison control circuit, and a voted message FIFO. Under software control, the RMU and DPBs perform the functions of management of asynchronous redundant digital messages, sorting of redundant messages received in arbitrary order, synchronization of distributed computing elements, comparison of data words of arbitrary bit length, and configuration control of active channels and communication path redundancy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.