Invention Grant
US07642830B2 Method and delay circuit with accurately controlled duty cycle 有权
方法和延迟电路具有精确控制的占空比

  • Patent Title: Method and delay circuit with accurately controlled duty cycle
  • Patent Title (中): 方法和延迟电路具有精确控制的占空比
  • Application No.: US12261941
    Application Date: 2008-10-30
  • Publication No.: US07642830B2
    Publication Date: 2010-01-05
  • Inventor: Robert L White
  • Applicant: Robert L White
  • Applicant Address: US TX Dallas
  • Assignee: Texas Instruments Incorporated
  • Current Assignee: Texas Instruments Incorporated
  • Current Assignee Address: US TX Dallas
  • Agent Mirna G. Abyad; Wade J. Brady, III; Frederick J. Telecky, Jr.
  • Main IPC: H03K3/017
  • IPC: H03K3/017
Method and delay circuit with accurately controlled duty cycle
Abstract:
A delay locked loop includes a storage element coupled to a data bus and produces a data synchronization signal. A phase detector receives a data clock signal and the data synchronization signal and produces a delay control signal. A first delay circuit produces a signal which is delayed relative to the data clock signal according to the delay control signal. A second delay circuit receiving the delayed signal produces a control signal coupled to a control input of the storage element by delaying the delayed signal an amount which causes the control signal to have a predetermined duty cycle.
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