Apparatus and method for controlling refresh with current dispersion effect in semiconductor device
US7881140B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 2008 |
| Grant date | Feb 1, 2011 |
| Priority date | — |
| Expiry date | Dec 17, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/40618
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A refresh control apparatus is provided which is capable of dispersing a peak current at an all-bank refresh mode and reducing the characteristic difference between the banks. The refresh control apparatus includes an internal refresh counter for outputting row address signals to select word lines when a refresh command is inputted from an external circuit, a row decoder for outputting row decoding signals to select all banks in response bank active signals and the row address signals, an enable signal control unit for sequentially outputting at a time interval sense amplifier enable signals in response to the bank active signals and the refresh command, and a sense amplifier for sequentially refreshing all of the banks at a time interval in response to the sense amplifier enable signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.