Amendable static random access memory

Details Amendable static random access memory Amendable static random access memory

1995-12-15

1998-01-06

Beausoliel, Jr., Robert W.

Static information storage and retrieval

Magnetic bubbles

Guide structure

39518203, 39518205, 39518206, 365200, 371102, 371103, G11C 1700, G06F 1120

Patent

active

057060320

ABSTRACT:
The present invention discloses an amendable static RAM, which can be modified from a high-priced corrupt 32K.times.36 one to a correctly functioning 32K.times.32 one. In each memory block, at least a common sense amplifier is employed as an amendable local sense amplifier. Each amendable local sense amplifier is coupled to a corresponding amendable common sense amplifier and by a switching circuit following the amendable common sense amplifier to all I/O buffers in the same memory block. When the static RAM works well and does not require amendment, the switching circuit is set to a normal condition that the amendable common sense amplifier is coupled to a corresponding amendable I/O buffers. When the static RAM is corrupt and requires modification, the switching circuit is set to an amendable condition wherein the amendable common sense amplifier is coupled to a normal I/O buffer corresponding to the corrupt memory column.

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patent: 5253354 (1993-10-01), MacDonald et al.
patent: 5526317 (1996-06-01), McClure

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