Memory controllers comparing a difference between measured voltages with a reference voltage difference
US9934854B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2014 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Nov 14, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2213/77
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A memory controller includes a voltage driver and a voltage comparator. The voltage driver applies a variable voltage to a selected line of a crossbar array to determine a first measured voltage that drives a first read current through a selected memory cell of the crossbar array. The voltage driver applies the variable voltage to the selected line to determine a second measured voltage that drives a second read current through the selected memory cell. The voltage comparator then determines a voltage difference between the first measured voltage and the second measured voltage and to compare the voltage difference with a reference voltage difference to determine a state of the selected memory cell. The crossbar array comprises a plurality of row lines, a plurality of column lines, and a plurality of memory cells. Each memory cell is coupled between a unique combination of one row line and one column line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.