DAC - Page 2 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 2nd November 2001, 09:56 AM   #11
SKK is offline SKK  South Korea
diyAudio Member
 
Join Date: Nov 2001
Location: The Land of Morning Calm??

Hi all!

I have some questions regarding DAC circuit.
I've heard that some DACs and AV receivers use
multiple DAC chips per channel, like 2, 4, or even 8
chips per channel. They say that using multiple chips
improves dynamic range and distortion. But I don't know
what rationale supports such a claim. Could someone out
there enlighten me on this?

Actually, I've even seen a picture where one DAC chip is
piggybacked on another chip. And datasheets from Analog
Devices (AD1852, AD1853) actually show mono circuits
in which ROUT+ and LOUT- (LOUT+ and ROUT-) of a chip are
wired together and supplied to an analog stage.
If such a scheme is really effective, I'd like to give
a shot some day...
  Reply With Quote
Old 2nd November 2001, 10:09 PM   #12
Dave is offline Dave  New Zealand
diyAudio Member
 
Join Date: Oct 2001
Location: New Zealand
Connecting DAC chips in parallel improves the signal to noise ratio and dynamic range. I have not tried it myself so I couldn't comment on the sound. The other option which I am going to implement on my next DAC is a fully balanced configuration. Two DACs per channel one producing the inverted signal the other the non-inverted. A differential amplifier then amplifies these.
  Reply With Quote
Old 4th November 2001, 02:10 AM   #13
richt is offline richt  Puerto Rico
diyAudio Member
 
Join Date: Nov 2001
Location: puerto rico
Default clock

hi folks

if someone can answer me a question/

it will be appreciated!

on my cd player have a 1 bit dac with a 33.868 meg clock,
the dac divides that clck to be feed to the servo dsp.

the servo dsp generates the l/r data,44.1khz for left & right channel separation & a 3rd signal that i dont know if it is a word clock or bit clock???

this 3 signal goes to the dac again.

i made a reshape on the 3rd signal & the inprovment was so huge that i am willing to trade info with someone that
can make or design a clock reshaper unit!!

thanks
richt
h
  Reply With Quote
Old 4th November 2001, 03:19 AM   #14
Dave is offline Dave  New Zealand
diyAudio Member
 
Join Date: Oct 2001
Location: New Zealand
Is the clock generated by the DAC chip and sent from there to the Servo DSP?
The servo DSP will probably send back a DATA line, a Bit clock and a left/right clock.
  Reply With Quote
Old 5th November 2001, 01:20 AM   #15
richt is offline richt  Puerto Rico
diyAudio Member
 
Join Date: Nov 2001
Location: puerto rico
hi dave

thank you for your info.

i made a clock reshape on the bit clock that goes to the dac
and the difference was huge!!!!
now im going to install the superclock too!

thanks
richt
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 05:09 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2