发明名称 |
Magnetic bubble memory chip with dedicated redundancy data section provided thereon |
摘要 |
A magnetic bubble memory chip structure on which a plurality of magnetic bubble storage loops are provided for containing information data as represented by bubbles and voids and including a dedicated area on the chip for containing redundancy data as represented by a chain of bubbles and voids arranged in a predetermined manner to identify good and defective information data storage loops. The redundancy data-containing dedicated area of the chip comprises a plurality of redundancy data-containing storage loops of equal number to the information data-containing storage loops so as to correspond thereto in a one-on-one relationship, with the number of individual bit positions included in each information data-containing storage loop being significantly greater than the number of bit positions included in each individual redundancy data-containing storage loop. At least one bubble detector is included on the chip, being associated with the information data-containing bubble storage loops and the redundancy data-containing storage loops for receiving readout of information data and redundancy data in an alternating coordinated sequence with each bit of information data from a respective information data-containing storage loop being preceded by a bit of redundancy data from the corresponding redundancy data-containing storage loop which identifies whether the following bit of information data is from a good or a defective information data-containing storage loop. The output from the detector is operably controlled by appropriate logic circuitry for restricting the usable readout from the information data-containing bubble storage loops to data which is delivered from good storage loops as determined by the redundancy data imparted by respective redundancy data-containing storage loops.
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申请公布号 |
US4321693(A) |
申请公布日期 |
1982.03.23 |
申请号 |
US19800174310 |
申请日期 |
1980.07.31 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
NADEN, REX A. |
分类号 |
G11C19/08;G11C29/00;(IPC1-7):G11C19/08 |
主分类号 |
G11C19/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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