发明授权
US07307909B2 Self-refresh timer circuit and method of adjusting self-refresh timer period
有权
自刷新定时器电路及调整自刷新定时器周期的方法
- 专利标题： Self-refresh timer circuit and method of adjusting self-refresh timer period
- 专利标题（中）： 自刷新定时器电路及调整自刷新定时器周期的方法
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申请号： US11297646申请日： 2005-12-09
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公开(公告)号： US07307909B2公开(公告)日： 2007-12-11
- 发明人: Yoshinori Matsui , Hitoshi Tanaka , Kazuhiko Kajigaya , Akiyoshi Yamamoto , Tadashi Onodera
- 申请人： Yoshinori Matsui , Hitoshi Tanaka , Kazuhiko Kajigaya , Akiyoshi Yamamoto , Tadashi Onodera
- 申请人地址： JP Tokyo
- 专利权人： Elpida Memory Inc.
- 当前专利权人： Elpida Memory Inc.
- 当前专利权人地址： JP Tokyo
- 代理机构： McDermott Will & Emery LLP
- 优先权： JP2004-359233 20041210
- 主分类号： G11C11/406
- IPC分类号： G11C11/406
摘要：
A self-refresh timer circuit for generating a timer period for controlling self-refresh operation of a semiconductor memory device comprising: a temperature-dependent voltage source for outputting a voltage having a temperature dependency based on a diode characteristic; a control current generating circuit for applying an output voltage of the temperature-dependent voltage source to a temperature detecting device having a diode characteristic and for generating a control current having a magnitude in proportion to a current flowing through the temperature detecting device; and a timer period generating circuit for generating a timer period in inverse proportion to the magnitude of the control current.
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