发明授权
US07872923B2 Low voltage sensing scheme having reduced active power down standby current
有权
低电压感测方案具有降低的有功功率的待机电流
- 专利标题: Low voltage sensing scheme having reduced active power down standby current
- 专利标题(中): 低电压感测方案具有降低的有功功率的待机电流
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申请号: US12079765申请日: 2008-03-28
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公开(公告)号: US07872923B2公开(公告)日: 2011-01-18
- 发明人: Tae Kim
- 申请人: Tae Kim
- 申请人地址: US ID Boise
- 专利权人: Micron Technology, Inc.
- 当前专利权人: Micron Technology, Inc.
- 当前专利权人地址: US ID Boise
- 代理机构: Dorsey & Whitney LLP
- 主分类号: G11C7/10
- IPC分类号: G11C7/10
摘要:
A low voltage sensing scheme reduces active power down standby leakage current in a memory device. During memory's active power down state, the leak current may increase because of the use of P and Nsense amplifiers having low threshold voltages (Vth) for low Vcc sensing of data signals. A clamping device or diode is used between a Psense amplifier control line (e.g. ACT) and Vcc and/or between an Nsense amplifier control line (e.g. RNL*) and Vss (ground potential). The clamping diode is not enabled during normal memory operations, but is turned on during active power down mode to reduce leakage current through ACT and/or RNL* nodes. The clamping device connected to the ACT node may reduce the voltage on the ACT line during power down mode, whereas the clamping device connected to the RNL* node may increase the voltage on the RNL* line during power down mode to reduce sense amplifier leakage current through these nodes. Because of the rules governing abstracts, this abstract should not be used to construe the claims.
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