AC sensing for a resistive memory
US7263017B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 7, 2006 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Jul 7, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2213/79
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Alternating current is used to sense a logic state of a memory cell that has a resistive memory element. The memory element can be in an array and a memory device can include the array and peripheral circuitry for reading or sensing each memory cell in the array. The peripheral circuitry can include a clock/control circuit providing a control signal, which controls when a row of memory cells are sensed, a switching circuit for receiving a cellplate count signal and a bit count signal provided by the clock/control circuit, a cellplate line signal and a bit line signal from the memory cell, the switching circuit producing a first output signal and a second output signal, wherein one of the first output signal and the second output signal is at a supply voltage and the other of the first output signal and the second output signal alternates polarity with each sensing operation and a comparison circuit receiving the first output signal and the second output signal and outputting a signal corresponding to the logic sate of the memory cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.