Semiconductor storage device

Details Semiconductor storage device Semiconductor storage device

2007-12-11

2007-12-11

Phung, Anh (Department: 2824)

Static information storage and retrieval

Read/write circuit

Differential sensing

C365S208000

Reexamination Certificate

active

11376169

ABSTRACT:
A semiconductor storage device for storing data to unit blocks of a memory cell array, comprising: two rows of sense amplifiers arranged on both sides of bit lines and each including sense amplifiers; a switch means for switching a connecting state between one row of sense amplifiers and one side of bit lines and switching a connecting state between the other row of sense amplifiers and the other side of bit lines; a control means which sets at least one row of sense amplifiers as a cache memory, and when performing refresh operation of the unit block where row of sense amplifiers to be used as cache memory holds data, controls switch means so that the row of sense amplifiers used as cache memory is disconnected from bit lines and only the row of sense amplifiers not used as said cache memory is used in refresh operation.

REFERENCES:
patent: 5774408 (1998-06-01), Shirley
patent: 6466502 (2002-10-01), Matsumoto
patent: 7068528 (2006-06-01), Won
patent: 2004-103657 (2004-04-01), None

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