DIY Sample Clock?

[synthetic]

Sample Clock generators seem like they might be a DIY candidate. It seems that that cheap ones are everywhere, then there are the high-end versions from Apogee, etc. Does someone have a schematic for a low-jitter sample clock that might be possible as a DIY project? I've heard that this can make a big difference in audio quality by decreasing jitter.

Just curious, -jl

 

[mhelin]

You must mean Word Clock? Sample clock is the ~32xFS clock that is generated by the PLL inside some ADC's and DAC's, but it hasn't be as accurate as word clock. Another clock is super word clock which is 256xFS (very high frequency) clock which can be used as master clock (like in some Crystal and AKM converters), the lower clocks (sample clock and word clock) are then derived from this just by diviving the master clock frequency. Anyway, I think that if the jitter is already low enough it doesn't make much difference. However, the High End hifi folks may have other opinion on this subject as they have on cables and such (beyond my comprehension).

 

[bcarso]

There might be an opportunity to do very low phase noise with a mix of top-notch FETs and other discrete components.

 

[mcs]

Are you looking for a fixed or a programmable clock (one/more samplerates)?

That makes a big difference...

Best regards,

Mikkel C. Simonsen

 

[synthetic]

I would want multiple sample rates: 44.1k - 192k. Oh well, maybe B1g Ben is a bargain after all.

 

[mcs]

Then this board should more or less do what you want:

Here's the schematic: http://stiftsbogtrykkeriet.dk/~mcs/Clock_sch.gif

Best regards,

Mikkel C. Simonsen

 

[Rochey]

what about a design that'll take incoming word clock and give out higher multiples of it for the bitclock?

*sigh*