Digital Delay Loop using the modified VCDL

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SPICE simulation of the Digital Delay Loop (DDL) that uses the modified version of Voltage-Controlled Delay Line (VCDL). The VCDL gain must be as linear as possible, otherwise the DLL can exhibit second-order locking effects. To reduce the jitter and to linearize the loop’s response, a large capacitor (5pF) is used for the loop filter.

  • Free
  • Advanced
  • 51-100
  • LTspice
  • IV
  • No
  • output locked input and output of the DLL large capacitor for the loop filter


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