Invention Grant
US06985389B2 Phase change based memory device and method for operating same 有权
基于相变的存储器件及其操作方法

  • Patent Title: Phase change based memory device and method for operating same
  • Patent Title (中): 基于相变的存储器件及其操作方法
  • Application No.: US10695238
    Application Date: 2003-10-27
  • Publication No.: US06985389B2
    Publication Date: 2006-01-10
  • Inventor: Herman Ma
  • Applicant: Herman Ma
  • Applicant Address: US TX Carrollton
  • Assignee: STMicroelectronics, Inc.
  • Current Assignee: STMicroelectronics, Inc.
  • Current Assignee Address: US TX Carrollton
  • Agent Lisa K. Jorgenson; Andre M. Szuwalski
  • Main IPC: G11C7/00
  • IPC: G11C7/00
Phase change based memory device and method for operating same
Abstract:
A circuit and method are disclosed for a memory device, such as a phase change memory. Specifically, there is disclosed a memory having a plurality of columns of memory cells, with each column of memory cells being coupled to a bit or data line. Each memory cell includes a programmable resistive element coupled in series with a select transistor. Each bit line is coupled to a distinct reference cell and a distinct transistor. The transistor is coupled between the corresponding bit line and a reference voltage, such as ground. During a memory read operation, the transistor, reference cell and addressed memory cell form a differential amplifier circuit. The output of the differential amplifier circuit is coupled to the data output terminals of the phase change memory.
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