Mos shift register compensation system for defective tracks of drum storage system
US4016547A · kind A · utility
8Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1976 |
| Grant date | Apr 5, 1977 |
| Priority date | — |
| Expiry date | Jan 22, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1883
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Loss of a magnetic track on a rotating drum memory is compensated for by a erially connected shift register. Since replacement of an entire magnetic drum is a costly venture, it usually is not warranted when only one or two or several tracks have become corroded or otherwise scored. The shift register is provided with an appropriate amount of stages to handle the data otherwise stored on a damaged magnetic drum track. Provision is made in the inventive concept herein disclosed for providing index and clock signals in event of the failure of the index and clocking tracks in the memory drum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.