Mask ROM having redundancy function

Details Mask ROM having redundancy function Mask ROM having redundancy function

1997-04-22

1999-03-02

Canney, Vincent P.

Excavating

G06F 1100

Patent

active

058780483

ABSTRACT:
A mask ROM having a redundancy function according to the present invention comprises a plurality of redundancy memory cells subjected to data write processing using a laser trimmer, a bit line connected to each of the plurality of redundancy memory cells, a sense amplifier connected to the redundancy bit line, a redundancy bit setting section for holding a setting result, and a switch section for selectively outputting an output from the sense amplifier as it is and an inverted output thereof in accordance with the setting result.

REFERENCES:
patent: 5179536 (1993-01-01), Kasa et al.
patent: 5388076 (1995-02-01), Ihara

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