Semiconductor memory unit with repair circuit

Details Semiconductor memory unit with repair circuit Semiconductor memory unit with repair circuit

2007-04-10

2007-04-10

Decady, Albert (Department: 2138)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Replacement of memory spare location, portion, or segment

C714S718000

Reexamination Certificate

active

10330165

ABSTRACT:
A semiconductor memory unit with a repair circuit includes a controller, a 2-to-1 selector, an address decoder and an address comparator. The controller supplies the 2-to-1 selector and the address comparator with a setup signal to carry out the following control. When the 2-to-1 selector is controlled to supply the address decoder with a repair address signal, the address comparator is controlled to have a repair signal information holding section, which is installed in the address comparator, hold the repair address decoded by the address decoder. When the 2-to-1 selector is controlled to supply the address decoder with a read/write address signal, the address comparator is controlled to compare the read/write address with the repair address. The semiconductor memory unit can obviate the need for a repair address decoder, thereby reducing the unit area.

REFERENCES:
patent: 4310901 (1982-01-01), Harding et al.
patent: 6178125 (2001-01-01), Niiro
patent: 6603691 (2003-08-01), Yoo et al.
patent: 6754746 (2004-06-01), Leung et al.
patent: 2000215666 (2000-08-01), None

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