WRPLL simulation

Frequency and time domain simulation for WRPLL

Installation

Poetry:

poetry install
poetry run jupyter lab

Poetry shell:

poetry install
poetry shell

Nix:

nix develop

Quick start

• The simulation file is located at src
• RAM usage and execution time estimate for time domain simulation
  • 500,000,000 time steps: 8GiB RAM and 55 seconds
• Frequency domain doc is also available

WRPLL formulas

• Assume the difference between f_{main}, f_{gtx} is very small

  • Let f_{in} = f_{main} = f_{gtx}

  • f_{helper} = f_{in} * \dfrac{N-1}{N}

  • f_{beat} = f_{in} - f_{helper} = \dfrac{f_{in}}{N}

• Main and helper Si549 DCXO ADPLL setting

  • ADPLL = \dfrac{\Delta f_{outppm}}{0.0001164}

Limitation