Re: OT: sound speed depends on frequency on mars

On Sun, 1 Sep 2024 15:34:13 +1000, Bill Sloman <bill.sloman@ieee.org>
wrote:

Meander-line sections connected by loading coils could be interesting.
One product that I'm considering now is a programmable delay line, and
that idea might help.

>
Like the MC100EP195?
>
https://www.onsemi.com/pdf/datasheet/mc100ep195-d.pdf
>
You do seem to spend a lot of time re-inventing the wheel, and
congratulating yourself on the originality of your re-invented concepts.

I've tested that part. It's expensive, drifty, and has an insane
amount of jitter. It's funny that its resolution is "about 10 ps"

Maxim and I think someone else made CMOS programmable delay line
chips, which were equally bad, not to mention discontinued.

We mostly use fast ramps and comparators and DACs to make programmable
delays. Jitter is low and polynomial calibration makes them very
accurate. Cheap too.

Of course I keep inventing things. That's my job.