Word line driver circuit for selecting and deselecting word lines
US8976600B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2013 |
| Grant date | Mar 10, 2015 |
| Priority date | — |
| Expiry date | Oct 4, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A memory circuit includes word lines coupled to a memory array, including a first set of one or more word lines deselected in an erase operation, and a second set of one or more word lines selected in the erase operation. Control circuitry couples the first set of one or more word lines deselected in the erase operation to a reference voltage, responsive to receiving an erase command for the erase operation. Some examples further include a first transistor that switchably couples a word line to a global word line, and a second transistor that switchably couples the word line to a ground voltage. The control circuitry is coupled to the first transistor and the second transistor, wherein the control circuitry has a plurality of modes including at least an erase operation. In a first mode, the first transistor couples the word line to the global word line, and the second transistor decouples the word line from the ground voltage. In a second mode, the first transistor decouples the word line from the global word line, and the second transistor couples the word line to the ground voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.