Static information storage and retrieval – Read/write circuit – Bad bit
Patent
1996-04-18
1998-01-13
Zarabian, A.
Static information storage and retrieval
Read/write circuit
Bad bit
36523003, G11C 700
Patent
active
057086125
ABSTRACT:
When a test mode signal is at an inactive level, a redundant cell column control circuit selects redundant cell column select signals. When the test mode signal is at an active level, the circuit selects a predetermined bit from the column select signal to output redundant cell column selection control signals, which are supplied to redundant cell column switch circuits. In a test mode, all blocks are set to an active state to select a predetermined memory cell column, and the redundant cell columns are concurrently selected. An accelerated biassing test can be conducted for all redundant cell columns within a competent test time.
REFERENCES:
patent: 5459690 (1995-10-01), Rieger
NEC Corporation
Zarabian A.
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