Recirculating memory with plural input-output taps
US4128879A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1977 |
| Grant date | Dec 5, 1978 |
| Priority date | — |
| Expiry date | Dec 20, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C19/285
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A CCD (charge coupled device) RAM (random access memory) includes a plurality of "rings" of serially connected CCDs in which digital information recirculates. A combinational decoder selects one of the plurality of rings by decoding a first group of binary address inputs. Each ring includes a plurality of input/output circuits coupled to associated "taps", each tap being coupled between an input and an output of a CCD regeneration cell. An address addition circuit includes a counter which counts at the same rate that data shifts through each of the rings and has a plurality of taps spaced at the same intervals (numbers of intervening CCD cells) as the taps in each of the rings. The counter outputs are decoded to provide a first internal address corresponding to the location of a fictitious tag bit in a ring with reference to an initial reference bit in a ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.