Invention Grant
US07791969B2 Method and apparatus for screening bit line of a static random access memory (SRAM) for excessive leakage current
失效
用于筛选静态随机存取存储器(SRAM)的位线用于过度泄漏电流的方法和装置
- Patent Title: Method and apparatus for screening bit line of a static random access memory (SRAM) for excessive leakage current
- Patent Title (中): 用于筛选静态随机存取存储器(SRAM)的位线用于过度泄漏电流的方法和装置
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Application No.: US11934919Application Date: 2007-11-05
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Publication No.: US07791969B2Publication Date: 2010-09-07
- Inventor: Hiroshi Yoshihara
- Applicant: Hiroshi Yoshihara
- Applicant Address: JP Tokyo
- Assignee: Sony Computer Entertainment Inc.
- Current Assignee: Sony Computer Entertainment Inc.
- Current Assignee Address: JP Tokyo
- Agency: Gibson & Dernier LLP
- Agent Matthew B. Dernier
- Main IPC: G11C29/48
- IPC: G11C29/48

Abstract:
Methods and apparatus provide for testing an SRAM cell, the SRAM cell including an anti-parallel storage circuit operable to store a logic high or low value across a true node and a complementary node, where the true node and complementary node are coupled to a true bit line (BLT) and a complementary bit line (BLC), by first and second transistors, respectively, the method including: preventing a write driver circuit from significantly pulling the BLT towards a supply voltage; preventing a pre-charge circuit from significantly pulling the BLT towards the supply voltage; preventing the first transistor from significantly pulling the BLT towards the voltage stored in the SRAM cell; and comparing the voltage of the BLT under the foregoing conditions to a threshold voltage.
Public/Granted literature
- US20090116320A1 Methods and Apparatus for Screening Bit Line of a SRAM Public/Granted day:2009-05-07
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