Invention Grant
US08279687B2 Single supply sub VDD bit-line precharge SRAM and method for level shifting
有权
单电源VDD位线预充电SRAM和电平转换方法
- Patent Title: Single supply sub VDD bit-line precharge SRAM and method for level shifting
- Patent Title (中): 单电源VDD位线预充电SRAM和电平转换方法
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Application No.: US12779608Application Date: 2010-05-13
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Publication No.: US08279687B2Publication Date: 2012-10-02
- Inventor: Chad A. Adams , George M. Braceras , Daniel M Nelson , Harold Pilo , Vinod Ramadurai
- Applicant: Chad A. Adams , George M. Braceras , Daniel M Nelson , Harold Pilo , Vinod Ramadurai
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent Robert Walsh; David Cain
- Main IPC: G11C7/00
- IPC: G11C7/00

Abstract:
A reduced bitline precharge level has been found to increase the SRAM Beta ratio, thus improving the stability margin. The precharge level is also supplied to Sense amplifier, write driver, and source voltages for control signals. In the sense amplifier, the lower precharge voltage compensates for performance loss in the bit-cell by operating global data-line drivers with increased overdrive. In the write driver, the reduced voltage improves the Bitline discharge rate, improves the efficiency of the negative boost write assist, and decreases the reliability exposure of transistors in the write path from negative boost circuit.
Public/Granted literature
- US20110280088A1 SINGLE SUPPLY SUB VDD BITLINE PRECHARGE SRAM AND METHOD FOR LEVEL SHIFTING Public/Granted day:2011-11-17
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