Bipolar-transistor type semiconductor memory device having redun

Details Bipolar-transistor type semiconductor memory device having redun Bipolar-transistor type semiconductor memory device having redun

1985-10-17

1989-01-03

Popek, Joseph A.

Static information storage and retrieval

Read/write circuit

Bad bit

371 10, G11C 700

Patent

active

047962330

ABSTRACT:
A bipolar-transistor type semiconductor memory device including a normal memory cell array, redundancy memory cell array, a redundancy driving circuit, and a redundancy address decision circuit. When the redundancy address decision circuit determines that the input address coincides with the address of a defective circuit portion, the redundancy driving circuit is driven to enable the redundancy memory cell array instead of the normal memory cell array.

REFERENCES:
patent: 4365319 (1982-12-01), Takemae
patent: 4399372 (1983-08-01), Tanimoto et al.
patent: 4428068 (1984-01-01), Baba
patent: 4592024 (1986-05-01), Sakai et al.

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