[sdiy] Measuring phase diff between sines

[Eric Brombaugh]

Fredrik Carlqvist wrote:
> Hello all!
>
> I have two sine sources and wish to measure the phase difference with at
> least 14 bits accuracy, preferrably 16 bits.

I believe that this is a fairly well understood problem:

http://www.analog.com/en/subCat/0,2879,760%255F791%255F0%255F%255F0%255F,00.html

Look at that site for system-level implementation ideas, or just buy the 
parts.

Eric