Column redundancy circuit

Details Column redundancy circuit Column redundancy circuit

2007-12-27

2009-08-04

Yoha, Connie C (Department: 2827)

Static information storage and retrieval

Read/write circuit

Data refresh

C365S200000, C365S194000

Reexamination Certificate

active

07570536

ABSTRACT:
A column redundancy circuit is disclosed. The column redundancy circuit includes a first control signal generator configured to receive a refresh flag signal having an enable width larger than that of a refresh signal and a control signal and generate a pull-up control signal, a second control signal generator configured to receive the refresh flag signal and an address signal and generate a pull-down control signal, and a column repair fuse circuit configured to receive the pull-up control signal and the pull-down control signal and generate a redundant cell access signal.

REFERENCES:
patent: 5870341 (1999-02-01), Lin et al.
patent: 6327210 (2001-12-01), Kuroda et al.
patent: 7486577 (2009-02-01), Kim et al.
patent: 2007/0033450 (2007-02-01), Dray

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