: Research by authors like Ken Kundert or Michael Perrott , who have published extensively on high-level modeling of PLLs.

: Modules for implementing phase detectors, digital loop filters, and sigma-delta modulators.

The file is a software package containing C++ source code used for simulating Digital Sigma-Delta Phase-Locked Loops (PLLs) . It is typically provided as a companion to technical papers and research focusing on fractional-N frequency synthesis and phase-locked loop modeling. The primary academic work associated with this code is:

(or similar variations on modeling PLLs in C++). Key Contents of the Zip File