Timing Solutions Corp had several products that might be of interest.
Designed around 20 years ago. The TSC5110 was mixer based.
The TSC5120 and successors were A/D based.
The block diagram in the TSC52120A datasheet may be of interest:
https://www.axiomtest.com/documents/models/MicroSemi%205120A%20DataSheet.pdf
In the TSC5120A manual, Appendix B has some theory:
https://deki.mpifr-bonn.mpg.de/@api/deki/files/4701/=TSC-5120A-MAN-Rev-G.pdf
For you history buffs, Timing Solutions was bought by Symmetricom,
which was bought by Microsemi which was bought by Microchip. The
location and many of the key employees at TSC have remained despite
all the ownership changes.
Cheers,
Bob
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