发明申请
US20060140017A1 Ferroelectric memory reference generator systems using staging capacitors
有权
铁电存储器参考发电机系统采用分级电容器
- 专利标题: Ferroelectric memory reference generator systems using staging capacitors
- 专利标题(中): 铁电存储器参考发电机系统采用分级电容器
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申请号: US11100013申请日: 2005-04-06
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公开(公告)号: US20060140017A1公开(公告)日: 2006-06-29
- 发明人: Anand Seshadri , Jarrod Eliason , Sudhir Madan
- 申请人: Anand Seshadri , Jarrod Eliason , Sudhir Madan
- 专利权人: Texas Instruments Incorporated
- 当前专利权人: Texas Instruments Incorporated
- 主分类号: G11C11/22
- IPC分类号: G11C11/22 ; G11C5/14
摘要:
Reference generator systems (108, 130) and methods (200) are presented for providing bitline reference voltages for memory access operations in a ferroelectric memory device (102). The reference generator system (108, 130) comprises a primary capacitance (130), a precharge system (132) that charges the primary capacitance, and a reference system (108) with a plurality of local reference circuits (108a) associated with corresponding array columns that individually comprise a staging capacitance (Cs), a first switching device (S1) coupled between the staging capacitance and the primary capacitance (130), and a second switching device (S2, S3) coupled between the staging capacitance (Cs) and a bitline of the corresponding array column. The first switching device (S1) couples the staging capacitance (Cs) to the precharged primary capacitance (130) and then isolates the precharged staging capacitance (Cs) from the primary capacitance (130), and the second switching device (S2, S3) isolates the staging capacitance (Cs) from the bitline while the staging capacitance Cs is coupled to the primary capacitance (130), and then couples the precharged staging capacitance (Cs) to the bitline to provide a reference voltage to the bitline during the memory access operation.
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