发明授权
US5963470A Static semiconductor memory cell with improved data retention stability
失效
具有改进的数据保持稳定性的静态半导体存储单元
- 专利标题: Static semiconductor memory cell with improved data retention stability
- 专利标题(中): 具有改进的数据保持稳定性的静态半导体存储单元
-
申请号: US019560申请日: 1998-02-06
-
公开(公告)号: US5963470A公开(公告)日: 1999-10-05
- 发明人: Hirotoshi Sato
- 申请人: Hirotoshi Sato
- 申请人地址: JPX Tokyo
- 专利权人: Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人: Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX9-191430 19970716
- 主分类号: G11C11/412
- IPC分类号: G11C11/412 ; G11C11/00
摘要:
In a SRAM cell including a bipolar transistor and a cut transistor, the threshold Vtheff (Driver) of driver transistor and the threshold Vtheff (Cut) of cut transistor are set such that they satisfy the expressions,Vtheff(Driver).gtoreq.�{log(1 .mu.A)}-{log(Vcc/10R)}!.times.S(1)�{log(1 .mu.A)}-{log((Ie.times.(1/(hFE+1)))/10)}!.times.S.ltoreq.Vtheff(Cut).ltoreq.�{log(1 .mu.A)}-{log(Vcc/R)}!.times.S(2)Vtheff(Cut)-S.ltoreq.Vtheff(Ac) (3)
公开/授权文献
- USD366752S Sandal pair 公开/授权日:1996-02-06
信息查询