Semiconductor memory device and a method of operating the same
US9543952B2 · kind B2 · utility
8Cited by
15References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 15, 2014 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Dec 20, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2207/105
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A semiconductor memory device includes a ZQ calibration unit configured to generate an output high level voltage (VOH) code according to a VOH control code obtained from a result of comparing a reference voltage with a first VOH; and an output driver configured to generate a data signal having a second VOH determined by the VOH code. The VOH control code includes a pull-up VOH control code and a pull-down VOH control code and the VOH code includes a pull-up VOH code and a pull-down VOH code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.