Synchronous burst-access memory and word-line driving circuit therefor
Abstract
A synchronous burst-access memory latches a row address strobe signal, a column address strobe signal, and address signals in synchronization with a clock signal. Data are stored in rows and columns in a memory cell array. Data in a selected row are input and output in serial bursts in synchronization with the clock signal, starting from a selected column. The row and initial column address are provided as external inputs; subsequent column addresses are generated by an internal address counting circuit. A word-line driving circuit for a synchronous memory uses transparent latches to latch the row address strobe signal and address signals, enabling row address decoding to be completed prior to synchronization with the clock signal.
Term
Term ended
Projected expiry passed 24 July 2011, 15.2 years ago.
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Every citation, both ways
| Document | Relation | Office | Category | Cited during |
|---|---|---|---|---|
| EP0135940A2 | Cites | European Patent Office (EPO) | A | Search report |
| US4513372A | Cites | United States of America | A | Search report |
13 members in 5 offices
Priority claims6
| Document | Office | Kind | Date |
|---|---|---|---|
| 19687790 | Japan | – | |
| 19687790 | Japan | A | |
| 25969790 | Japan | – | |
| 25969790 | Japan | A | |
| JP19900196877 | – | – | – |
| JP19900259697 | – | – | – |
Members13
| Document | Office | Kind | |
|---|---|---|---|
| EP0468480A2 | European Patent Office (EPO) | A2 | |
| KR920003305A | Republic of Korea | A | |
| JPH0489687A | Japan | A | |
| JPH04137295A | Japan | A | |
| EP0468480A3This record | European Patent Office (EPO) | A3 | |
| US5268865A | United States of America | A | |
| US5327390A | United States of America | A | |
| EP0468480B1 | European Patent Office (EPO) | B1 | |
| DE69123890D1 | Germany | D1 | |
| DE69123890T2 | Germany | T2 | |
| USRE35723E | United States of America | E | |
| JP2878815B2 | Japan | B2 | |
| KR100214435B1 | Republic of Korea | B1 |
28 legal events, as 4 offices reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | Office | |
|---|---|---|---|
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal feeWithdrawnR119 | R119 | DE | |
| Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25 | PG25 | EP | |
| Notification of lapseLapsedST | ST | FR | |
| Gb: european patent ceased through non-payment of renewal feeCeasedGBPC | GBPC | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP | PGFP | EP | |
| Transmission of propertyTP | TP | FR | |
| Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)REGISTERED BETWEEN 20090416 AND 20090422732E | 732E | GB | |
| European patent in force as of 2002-01-01IF02 | IF02 | GB | |
| No opposition filedOpposition26N | 26N | EP | |
| No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE | PLBE | EP | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA | STAA | EP | |
| Fr: translation filedET | ET | EP | |
| Corresponds to:REF | REF | EP | |
| Designated contracting statesAK | AK | EP | |
| (expected) grantORIGINAL CODE: 0009210GRAA | GRAA | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH | GRAH | EP | |
| Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH | GRAH | EP | |
| Despatch of communication of intention to grantORIGINAL CODE: EPIDOS AGRAGRAG | GRAG | EP | |
| First examination report despatched17Q | 17Q | EP | |
| Request for examination filed17P | 17P | EP | |
| Designated contracting statesAK | AK | EP | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | EP | |
| Designated contracting statesAK | AK | EP | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI | EP |
Numbers
- Publication
- 0468480
- Publication, DOCDB
- 0468480
- Publication, EPODOC
- EP0468480
- Application
- 112424
- Application, DOCDB
- 91112424
- Application, EPODOC
- EP19910112424
Titles3
- English
- Synchronous burst-access memory and word-line driving circuit therefor
- German
- Synchronisierter Burstzugriffsspeicher und Wortleitungstreiber dafür
- French
- Mémoire à accès à rafale synchronisée et circuit d'attaque de ligne de mot pour celle-ci
Classification
- CPC, 4
- G11C7/1018
- G11C7/1072
- G11C8/00
- G11C8/18
- IPC, 3
- G11C7 10
- G11C8 00
- G11C8 18
Designated states3
- Contracting states, 3
- Germany
- France
- United Kingdom