Invention Grant
US08027206B2 Bit line voltage control in spin transfer torque magnetoresistive random access memory 有权
自旋传输转矩磁阻随机存取存储器中的位线电压控制

  • Patent Title: Bit line voltage control in spin transfer torque magnetoresistive random access memory
  • Patent Title (中): 自旋传输转矩磁阻随机存取存储器中的位线电压控制
  • Application No.: US12362500
    Application Date: 2009-01-30
  • Publication No.: US08027206B2
    Publication Date: 2011-09-27
  • Inventor: Sei Seung YoonSeung H. Kang
  • Applicant: Sei Seung YoonSeung H. Kang
  • Applicant Address: US CA San Diego
  • Assignee: QUALCOMM Incorporated
  • Current Assignee: QUALCOMM Incorporated
  • Current Assignee Address: US CA San Diego
  • Agent Michelle Gallardo; Nicholas J. Pauley; Jonathan T. Velasco
  • Main IPC: G11C7/10
  • IPC: G11C7/10
Bit line voltage control in spin transfer torque magnetoresistive random access memory
Abstract:
A Spin Transfer Torque Magnetoresistive Random Access Memory (STT-MRAM) and associated read operations are disclosed. A bit cell includes a magnetic tunnel junction (MTJ) and a word line transistor, the bit cell being coupled to a bit line and a source line. A clamping circuit is coupled to the bit line and is configured to clamp the bit line voltage to a desired voltage level during a read operation of the STT-MRAM to prevent the bit line voltage from exceeding the desired voltage level. The desired voltage level is less than a write voltage threshold associated with a write operation of the STT-MRAM.
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