[time-nuts] Re: Analog Devices AD9901 phase comparator

[ghf at hoffmann-hochfrequenz.de]

Am 2024-05-25 22:53, schrieb Bill via time-nuts:
> The AD9901 is old. I used one in a 20 MHz loop about 20 years ago with 
> no problem.
> However my testing was limited.
> 
> I have two in dip packages ( 20 years old) that you can have.

Oh, thanks for the offer, but I have enough of them in PLCC and DIP. :-)

I had made a VHDL translation, strictly following the AD data sheet.
Also included some prescaling and local 1pps generation.
The execution vehicle was a Xilinx Coolrunner2 CPLD which is end of life 
now,
so I need a new CPLD and it's a good opportunity to compare performance.

The souped-up 4046 with backlash correction all seem to have gone.

best regards, Gerhard