发明授权
US07728629B2 Buffer with inductance-based capacitive-load reduction 失效
具有基于电感的电容负载减小的缓冲器

  • 专利标题: Buffer with inductance-based capacitive-load reduction
  • 专利标题(中): 具有基于电感的电容负载减小的缓冲器
  • 申请号: US11526306
    申请日: 2006-09-25
  • 公开(公告)号: US07728629B2
    公开(公告)日: 2010-06-01
  • 发明人: Jinghong Chen
  • 申请人: Jinghong Chen
  • 申请人地址: US PA Allentown
  • 专利权人: Agere Systems Inc.
  • 当前专利权人: Agere Systems Inc.
  • 当前专利权人地址: US PA Allentown
  • 代理机构: Mendelsohn, Drucker & Assoc., P.C.
  • 代理商 Kevin M. Drucker; Steve Mendelsohn
  • 主分类号: H03K19/094
  • IPC分类号: H03K19/094
Buffer with inductance-based capacitive-load reduction
摘要:
A buffer circuit uses (e.g., active) inductors for driving capacitive loads. In one embodiment, the buffer circuit has one or more stages, each stage having one CMOS inverter. Each CMOS inverter has one NMOS transistor and one PMOS transistor and is coupled to a stage input and a stage output. Additionally, at least one stage of the buffer circuit has two inductors, each coupled between a different voltage reference for the buffer circuit and the stage output. One inductor has a PMOS transistor coupled to the gate of an NMOS transistor and the other inductor has an NMOS transistor coupled to the gate of a PMOS transistor. When driving capacitive loads, the inductors partially tune out the apparent load capacitance CL, thereby improving the charging capabilities of inverter and enabling quicker charge and discharge times. Furthermore, partially tuning out apparent load capacitance facilitates the driving of larger capacitive loads.
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