Period Jitter

Signal jitter: to generate eye-diagram to get jitter

  1. Cut-off target to many parts.

  2. Overlap all the parts together to generate eye-diagram.

  3. Get reference voltage VREF.

  4. Report max jitter.
    Signal jitter diagram

Differential Noise: VIX

  1. Detect edges on target.

  2. Get cross-point on edge of target.

  3. Get the voltage of each cross-point.

  4. To get VIX for each cross-point: |V_cross-point-VREF|= |V_cross-point-0.5*IO_Power|.

  5. Report out the max value.

Cut-off Pattern

  1. Automatically parse out period to cut off target: For example, to cut off DQ to 13 parts by period
    Cut-off pattern

Period Jitter Example: Eye-diagram generation

  1. Overlap all the parts together to generate eye-diagram.

  2. To report jitter.

  3. 2UI eye jitter reports the max one of jitter1 & jitter2.
    Period Jitter Example, Eye Diagram