Static information storage and retrieval – Systems using particular element – Amorphous
Reexamination Certificate
2006-12-26
2006-12-26
Tran, Andrew Q. (Department: 2824)
Static information storage and retrieval
Systems using particular element
Amorphous
C365S148000, C365S194000, C365S189070
Reexamination Certificate
active
07154774
ABSTRACT:
A memory includes a storage element (OUM) made of a phase-change material for storing a logic value and an access element (OTS) switching from a higher resistance condition to a lower resistance condition in response to a selection of the memory cell, the access element in the higher resistance condition decoupling the storage element from a read circuit and in the lower resistance condition coupling the storage element to the read circuit. The read circuit includes a sense amplifier to determine the logic value stored in the memory cell according to an electrical quantity associated with the memory cell. The read circuit further includes a detector that detects the switching of the access element by comparison to a delayed waveform or sensing a change in the column rate of change, and a circuit to enable the sense amplifier in response to the detection of the switching of the access element.
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Bedeschi Ferdinando
Gastaldi Roberto
Parkinson Ward D.
Resta Claudio
Ovonyx Inc.
Tran Andrew Q.
Trop, Prunner & Hu, P.C.
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