发明授权
- 专利标题: Writeback and refresh circuitry for direct sensed DRAM macro
- 专利标题(中): 用于直接感测DRAM宏的回写和刷新电路
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申请号: US10064306申请日: 2002-07-01
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公开(公告)号: US06711078B2公开(公告)日: 2004-03-23
- 发明人: Ciaran J. Brennan , John A. Fifield , Jeremy K. Stephens , Daniel W. Storaska
- 申请人: Ciaran J. Brennan , John A. Fifield , Jeremy K. Stephens , Daniel W. Storaska
- 主分类号: B11C700
- IPC分类号: B11C700
摘要:
A writeback and refresh circuit for a direct sense architecture memory wherein a plurality of primary sense amps are connected to a global data line and also to bitlines, each of which is coupled to an array of memory storage cells which are selected for write and read operations by a plurality of wordlines. A single secondary sense amp receives analog level data from the primary sense amps over the global data line, and includes a restore/writeback circuit which digitizes the data and then returns the digitized data over the global data line to the primary sense amp and back into the memory. A 2-cycle read/writeback operation is used for each memory read cycle, a first cycle read operation, and a second cycle writeback operation. The 2-cycle destructive read architecture eliminates the need for a cache and complex caching algorithms.
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