Roll call tester

Details Roll call tester Roll call tester

1999-06-03

2000-07-25

Mai, Son

Static information storage and retrieval

Read/write circuit

Testing

365200, G11C 700

Patent

active

060943874

ABSTRACT:
In a roll call tester, a redundancy circuit is provided which, upon predetermined normal cell addressing, activates the normal cell while rendering the redundancy cell nonactive, and, upon predetermined redundancy cell addressing, renders the normal cell nonactive while, when the roll call test signal in the test signal activation circuit is nonactive, activating the redundancy cell. This construction can realize a roll call test while eliminating the need to use a redundancy detection circuit and a signal involved in the detection thereof, and can reduce chip area.

REFERENCES:
patent: 5517458 (1996-05-01), Koshikawa
patent: 5892718 (1999-04-01), Yamada

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