发明授权
- 专利标题: SRAM cell with intrinsically high stability and low leakage
- 专利标题(中): 具有本质上高稳定性和低泄漏性的SRAM单元
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申请号: US11758568申请日: 2007-06-05
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公开(公告)号: US07920409B1公开(公告)日: 2011-04-05
- 发明人: Lawrence T. Clark , Sayeed Ahmed Badrudduza
- 申请人: Lawrence T. Clark , Sayeed Ahmed Badrudduza
- 申请人地址: US AZ Scottsdale
- 专利权人: Arizona Board of Regents for and on behalf of Arizona State University
- 当前专利权人: Arizona Board of Regents for and on behalf of Arizona State University
- 当前专利权人地址: US AZ Scottsdale
- 代理机构: Withrow & Terranova, P.L.L.C.
- 主分类号: G11C11/00
- IPC分类号: G11C11/00
摘要:
A Static Random Access Memory (SRAM) cell having high stability and low leakage is provided. The SRAM cell includes a pair of cross-coupled inverters providing differential storage of a data bit. Power to the SRAM cell is provided by a read word line (RWL) signal, which is also referred to herein as a read control signal. During read operations, the RWL signal is pulled to a voltage level that forces the SRAM cell to a full-voltage state. During standby, the RWL signal is pulled to a voltage level that forces the SRAM cell to a voltage collapsed state in order to reduce leakage current, or leakage power, of the SRAM cell. A read-transistor providing access to the bit stored by the SRAM cell is coupled to the SRAM cell via a gate of the read transistor, thereby decoupling the stability of the SRAM cell from the read operation.
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