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In Reply to: RE: SiLabs Si570 and isolators posted by fmak on March 16, 2014 at 01:56:38
HowdyWell more than what? I just used the Si570 as a handy example, I don't claim that it is the best one out there, but current clock synthesizers (which use sigma delta "dither" to interpolate between integers when dividing the clock back down) aren't nearly as bad as the older ones that simply used a (big) integer clock multiplier followed by an integer clock divider. Some might claim that specifically whitening the jitter might be a good idea.
Digital isolators have more bandwidth than standard optical isolators and that isolation might be more beneficial than no isolation if the down stream jitter attenuation is high enough. It's all tradeoffs.
I still really don't have any idea what was being described in your original post :)
-Ted
Edits: 03/16/14Follow Ups:
They add jitter although they do isolate. I don't know what is better.
Howdy
On my prototype the jitter from the isolators wasn't a problem, but I think some systems wouldn't like having a few gigahertz pulsing radio transmitter on board :)
-Ted
which prototype is it. My W4S DSDSE has isolation on the usb input and sounds very good.
Howdy
The one I posted about in the PC Audio forum a while back.
http://www.audioasylum.com/forums/pcaudio/messages/8/80732.html
-Ted
And what exactly do you do for them and which product(s) has your expertise on it?
Howdy Jerome
I posted about my DSD DAC over on the PS Audio asylum a while back.
When I started working with PS Audio, both for their sake and mine I kept things quiet until it was clear that the DAC would get to market.
In the intervening years I designed and laid it out on a set of boards to work in their chassis so they could manufacture, market and sell it. I also consulted on the PerfectWave DAC MkII, or at least I offered up a menu of things that could lower jitter and they selected what seemed the most practical (or believable :) ) and implemented them.
http://www.psaudio.com/ has the picture of my DAC and if you look at their products it's the DirectStream, near the bottom of the DirectStream brief description is a link to more info with a more long winded version of it and some links to some videos... (Link below for easier navigation.)
-Ted
All the best and hope to listen to the DirectStream Dac soon.
Howdy
I hope you enjoy it.
-Ted
You were one of my favourite posters on the HiRez Forum when it started so many years ago.
I've been reading about your new DAC and have watched all the videos. I don't know enough to comment on the technical aspects (I'm more of a software and VoIP guy) but there is an elegance to your design that is very appealing. I wish you the best with the PS Audio DirectStream DAC and look forward to hearing it when I can.
Regards,
Geoff
Howdy
I've missed you and the others here. I decided to quit work when I found I was spending more time on line at the Asylum and listening to music than I could bring myself to spend at work.
Then I started this project and have had my head down for years :)
At least now I get to listen to music all of the time I want...
-Ted
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