Invention Grant
US08559247B2 Dynamic level shifter for interfacing signals referenced to different power supply domains 有权
动态电平移位器,用于连接参考不同电源域的信号

  • Patent Title: Dynamic level shifter for interfacing signals referenced to different power supply domains
  • Patent Title (中): 动态电平移位器,用于连接参考不同电源域的信号
  • Application No.: US13108730
    Application Date: 2011-05-16
  • Publication No.: US08559247B2
    Publication Date: 2013-10-15
  • Inventor: Shinye Shiu
  • Applicant: Shinye Shiu
  • Applicant Address: US CA Cupertino
  • Assignee: Apple Inc.
  • Current Assignee: Apple Inc.
  • Current Assignee Address: US CA Cupertino
  • Agency: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
  • Agent Lawrence J. Merkel; Erik A. Heter
  • Main IPC: G11C7/10
  • IPC: G11C7/10 H03K19/0185
Dynamic level shifter for interfacing signals referenced to different power supply domains
Abstract:
A dynamic level shifter is disclosed. In one embodiment, a dynamic level shifter circuit may receive an input signal referenced to a first voltage of a first power domain, and may output a corresponding signal referenced to a second voltage into a second power domain. The dynamic level shifter circuit may include an evaluation node that is precharged during a first phase (e.g., the low portion) of a clock signal. During the second phase (e.g., the high portion) of the clock signal, the evaluation node may be either pulled low or high, depending on the state of the input signal. A corresponding output signal, based on the evaluated level on the evaluation node, may be output into the second power domain.
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