发明名称 |
Self-refresh timer circuit and method of adjusting self-refresh timer period |
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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申请公布号 |
US2008074940(A1) |
申请公布日期 |
2008.03.27 |
申请号 |
US20070984352 |
申请日期 |
2007.11.16 |
申请人 |
ELPIDA MEMORY INC. |
发明人 |
MATSUI YOSHINORI;TANAKA HITOSHI;KAJIGAYA KAZUHIKO;YAMAMOTO AKIYOSHI;ONODERA TADASHI |
分类号 |
G11C7/04 |
主分类号 |
G11C7/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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