发明授权
US06771553B2 Low power auto-refresh circuit and method for dynamic random access memories
失效
低功耗自动刷新电路和动态随机存取存储器的方法
- 专利标题: Low power auto-refresh circuit and method for dynamic random access memories
- 专利标题(中): 低功耗自动刷新电路和动态随机存取存储器的方法
-
申请号: US10056935申请日: 2001-10-18
-
公开(公告)号: US06771553B2公开(公告)日: 2004-08-03
- 发明人: Timothy B. Cowles , Brian M. Shirley , Greg A. Blodgett
- 申请人: Timothy B. Cowles , Brian M. Shirley , Greg A. Blodgett
- 主分类号: G11C700
- IPC分类号: G11C700
摘要:
A power saving circuit disables input buffers for command and address signals during an auto-refresh of a DRAM. The input buffers are re-enabled at the end of the auto-refresh in a manner that does not cause spurious commands to be generated. The power saving circuit prevents spurious commands by biasing internal command signals to a “no operation” command whenever the input buffers for the command signals are disabled. The DRAM may also be placed in a mode in which it automatically transitions to a low power precharge mode at the end of the auto-refresh to further reduce power consumed by the DRAM.