Invention Grant
- Patent Title: Memory read stability using selective precharge
- Patent Title (中): 使用选择性预充电的存储器读稳定性
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Application No.: US12334817Application Date: 2008-12-15
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Publication No.: US08223567B2Publication Date: 2012-07-17
- Inventor: Mohamed H. Abu Rahma , Ritu Chaba , Nan Chen , Sei Seung Yoon
- Applicant: Mohamed H. Abu Rahma , Ritu Chaba , Nan Chen , Sei Seung Yoon
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Sam Talpalatsky; Nicholas J. Pauley; Jonathan T. Velasco
- Main IPC: G11C7/00
- IPC: G11C7/00

Abstract:
A memory device utilizes selective precharge and charge sharing to reduce a bit line voltage before accessing a bit cell. A reduction in bit line voltage is achieved by precharging different sections of the bit line to different voltages (e.g., a supply voltage and ground) and using charge sharing between these sections. Read stability improves as a result of the reduction of bit line voltage. The relative capacitance difference between bit line sections determines the bit line voltage after charge sharing. Thus, the memory device is tolerant to process or temperature variations. The bit line voltage may be controlled in design by selecting the sections that are precharged to supply voltage or ground.
Public/Granted literature
- US20090154274A1 Memory Read Stability Using Selective Precharge Public/Granted day:2009-06-18
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