Stt-mram sensing technique
AssigneeInternational Business Machines Corporation
InventorJohn DeBrosse
Life of this patent
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Abstract
Embodiments are directed to a system for sensing a data state of a selected memory cell. The system includes a first reference cell, a sample-and-hold sense amplifier and a switching system. During a first sensing phase the switching system is configured to open a first series communication path that places the selected memory cell in series with the first reference cell, thereby creating a first series voltage divider. During the first sensing phase, the switching system is further configured to open a first branch communication path that taps an input of the sample-and-hold sense amplifier into a first divided voltage between the selected memory cell and the first reference cell.
Claims20
A system for sensing a data state of a selected memory cell, the system comprising:
- a first reference cell;
- a sample-and-hold sense amplifier;
- and
- a switching system;
- wherein during a first sensing phase said switching system is configured to:
- open a first series communication path that places the selected memory cell in series with said first reference cell, thereby creating a first series voltage divider;
- and
- open a first branch communication path that taps an input of said sample-and-hold sense amplifier into a first divided voltage between the selected memory cell and said first reference cell.
A method for sensing a data state of a selected memory cell, the method comprising:
- during a first sensing phase, opening a first series communication path that places the selected memory cell in series with a first reference cell, thereby creating a first series voltage divider;
- and
- during said first sensing phase, opening a first branch communication path that taps an input of a sample-and-hold sense amplifier into a first divided voltage between the selected memory cell and said first reference cell.
Dependencies are inferred from the claim text.