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In-loop duty corrector delay-locked loop for multiphase clock generation

  • US 20070046345A1
  • Filed: 08/24/2005
  • Published: 03/01/2007
  • Est. Priority Date: 08/24/2005
  • Status: Active Grant
First Claim
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1. A delay-locked loop (DLL) including:

  • a plurality of serially-connected delay cells, wherein each delay cell includes an internal duty cycle correction loop;

    delay correction circuitry for providing a control voltage to the plurality of delay cells via a DLL feedback loop; and

    a lock detector that activates the duty cycle correction loop of each delay cell based on the control voltage.

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