Invention Grant
US07885093B2 Method for testing a static random access memory 有权
测试静态随机存取存储器的方法

  • Patent Title: Method for testing a static random access memory
  • Patent Title (中): 测试静态随机存取存储器的方法
  • Application No.: US12438325
    Application Date: 2007-08-21
  • Publication No.: US07885093B2
    Publication Date: 2011-02-08
  • Inventor: Paul WielageMohamed Azimane
  • Applicant: Paul WielageMohamed Azimane
  • Applicant Address: NL Eindhoven
  • Assignee: NXP B.V.
  • Current Assignee: NXP B.V.
  • Current Assignee Address: NL Eindhoven
  • Priority: EP06119335 20060822
  • International Application: PCT/IB2007/053337 WO 20070821
  • International Announcement: WO2008/023334 WO 20080228
  • Main IPC: G11C11/00
  • IPC: G11C11/00
Method for testing a static random access memory
Abstract:
A method testing an SRAM having a plurality of memory cells is disclosed. In a first step, a bit value is written into a cell under test (CUT). Subsequently, the first and second enabling transistors are disabled and the bit lines are discharged to a low potential. Next, the word line (WL) coupled to the memory cell under test is activated for a predetermined period. During a first part of this period, one of the bit lines (BLB) is kept at the low potential to force the associated pull up transistor in the CUT into a conductive state, after which this bit line (BLB) is charged to a high potential. Upon completion of this period, the bit value of the first cell is determined. The method facilitates the detection of weak or faulty SRAM cells without requiring the inclusion of dedicated hardware for this purpose.
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