Write driver circuit for controlling a write current applied...

Details Write driver circuit for controlling a write current applied... Write driver circuit for controlling a write current applied...

2005-03-15

2008-11-04

Tran, Andrew Q (Department: 2824)

Static information storage and retrieval

Read/write circuit

Differential sensing

C365S211000, C365S163000, C365S225700, C365S148000, C365S230060

Reexamination Certificate

active

07447092

ABSTRACT:
A programming method which controls the amount of a write current applied TO Phase-change Random Access Memory (PRAM), and a write driver circuit realizing the programming method. The programming method includes maintaining a ratio of a resistance of the PCM in the higher resistance state to a resistance of the phase change material (PCM) in the lower resistance state constant or substantially constant independent of an ambient temperature. The ratio may be maintained by increasing, decreasing or keeping the same a reset current and/or a set current.

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patent: 2006/0028886 (2006-02-01), Choi et al.
patent: 2006/0109707 (2006-05-01), Happ et al.

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