Semiconductor memory with built-in cache

Details Semiconductor memory with built-in cache Semiconductor memory with built-in cache

1994-12-29

1997-01-21

Zarabian, A.

Static information storage and retrieval

Associative memories

Ferroelectric cell

365149, G11C 1500

Patent

active

055965210

ABSTRACT:
A semiconductor memory device has memory cells for storing data, sense amplifiers for amplifying the stored data, and cache cells in which the amplified data can be placed for quick recall. The cache cells can continue to hold data during memory-cell refresh cycles, permitting the cached data to be accessed quickly afterward. The cache cells may be coupled to column data lines that can be disconnected from the sense amplifiers, enabling memory cells to be refreshed while cache access is in progress. Write buffers may be provided so that when cache data are replaced, the old cache data can be copied back to the memory cells while the new cache data are being accessed.

REFERENCES:
patent: 4943944 (1990-07-01), Sakui et al.
patent: 4945512 (1990-07-01), DeKarske
patent: 5184320 (1993-02-01), Dye
patent: 5226009 (1993-07-01), Arimoto
patent: 5226147 (1993-07-01), Fujishima
patent: 5249282 (1993-09-01), Segers
IEEE International Solid State Circuits Conference, vol. 35, Feb. 1, 1992, pp. 148-149, 269.

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