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Reading system for read only memory device

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专利汇可以提供Reading system for read only memory device专利检索,专利查询,专利分析的服务。并且PURPOSE: To improve yield of an ROM by determining an output value of ≥3 ORMs of the same kind basing on judging criteria and making them usable as a complete ROM.
CONSTITUTION: ROMs 5W7 store data of the same contents and the contents of address are also the same. When characterwise addresses A
11 WAN are given to ROMs 5W7 and addresses of dots in characters A
1 WA
10 are given, 0 or 1 of the same contents is outputted. Decision by majority is made by a majority circuit 8, and outputted as output of one ROM. When there are defects, whichever greater in number out of 0 or 1 is selected by the circuit 8, and therefore, defects are compensated. As it rarely occurs that two ROMs have defective cell at the same position, three defective ROMs can be used as one prefect ROM. Thus, yield can be improved.
COPYRIGHT: (C)1983,JPO&Japio,下面是Reading system for read only memory device专利的具体信息内容。

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