Invention Grant
US06331959B1 Semiconductor memory device and control method thereof 有权
半导体存储器件及其控制方法

  • Patent Title: Semiconductor memory device and control method thereof
  • Patent Title (中): 半导体存储器件及其控制方法
  • Application No.: US09525611
    Application Date: 2000-03-14
  • Publication No.: US06331959B1
    Publication Date: 2001-12-18
  • Inventor: Takuya Hirota
  • Applicant: Takuya Hirota
  • Priority: JP11-071551 19990317
  • Main IPC: G11C700
  • IPC: G11C700
Semiconductor memory device and control method thereof
Abstract:
A semiconductor storage device is disclosed that can lower sense amplifier input potentials to about a half supply potential (VCC/2) to speed up sense amplifier operations. According to one embodiment, a semiconductor storage device (100) may include a pair of digit lines (104 and 106), a memory cell (108) that can place stored data on digit lines (104 and 106), a sense amplifier (112) that may read memory cell data on digit lines (104 and 106), and switching devices (120-a and 120-b) connected between sense amplifier inputs (112-a and 112-b) and digit lines (104 and 106). Digit lines (104 and 106) may be precharged to a high potential. Memory cell data may then be placed on the digit lines (104 and 106). Prior to the activation of the sense amplifier (112) switching devices (120-a and 120-b) may lower the digit line potentials to a level more conducive to sensing by the sense amplifier (112). In this way, a read operation by the sense amplifier (112) may be faster than conventional approaches.
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