Digital Delay Loop using the modified VCDL

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e0880271-eea6-4cff-a21b-d31a0ca9fa9f.zip

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Description

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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