Invention Grant
US08300446B2 Ferroelectric random access memory with single plate line pulse during read 有权
读取期间具有单板线脉冲的铁电随机存取存储器

  • Patent Title: Ferroelectric random access memory with single plate line pulse during read
  • Patent Title (中): 读取期间具有单板线脉冲的铁电随机存取存储器
  • Application No.: US12966963
    Application Date: 2010-12-13
  • Publication No.: US08300446B2
    Publication Date: 2012-10-30
  • Inventor: Saim Ahmad Qidwai
  • Applicant: Saim Ahmad Qidwai
  • Applicant Address: US TX Dallas
  • Assignee: Texas Instruments Incorporated
  • Current Assignee: Texas Instruments Incorporated
  • Current Assignee Address: US TX Dallas
  • Agent Rose Alyssa Keagy; Wade J. Brady, III; Frederick J. Telecky, Jr.
  • Main IPC: G11C11/22
  • IPC: G11C11/22
Ferroelectric random access memory with single plate line pulse during read
Abstract:
A ferroelectric random access memory (FRAM) with reduced cycle time. During a read cycle, plate line voltages are boosted to a voltage to both transfer charge from the selected row of FRAM cells to corresponding bit lines, and to fully polarize a data state in the selected FRAM cells. In one embodiment of the invention, the fully polarized data states is present in those cells that previously stored that data state; for those cells storing the opposite state, a write-back pulse is executed. In another embodiment of the invention, the fully polarized data state results for each of the selected memory cells, by applying a plate line boost voltage of a higher magnitude. Those cells that are to store the opposite data state, as may be determined following error correction, are written back with that data state.
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