Spare decoder circuit

Details Spare decoder circuit Spare decoder circuit

1997-04-14

1998-11-17

Nguyen, Viet Q.

Static information storage and retrieval

Read/write circuit

Bad bit

365 96, 365226, G11C 700

Patent

active

058386211

ABSTRACT:
A spare decoder circuit generates a redundancy signal which accesses a redundancy cell on behalf of a failed cell when an input address for repairing the failed cell accesses the failed cell in a memory device having a redundancy cell. The spare decoder circuit includes: a first programming part which includes a first signal line for generating a redundancy signal; first enabling means for providing a constant electric potential to the first signal line; and first programming cells which are connected to an address line and control an electric potential of the first signal line; and a second programming part which includes: a second signal line for generating a redundancy signal; second enabling means for providing a constant electric potential to the second signal line; and second programming cells which are connected to an address line, and controls an electric potential of the second signal line.

REFERENCES:
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patent: 4734889 (1988-03-01), Mashiko et al.
patent: 5282165 (1994-01-01), Miyake et al.
patent: 5471427 (1995-11-01), Murakami et al.
patent: 5479371 (1995-12-01), Ootani
patent: 5574729 (1996-11-01), Kinoshita et al.
patent: 5652725 (1997-07-01), Suma et al.

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