ezDAC v.1.5 Builders Thread - Page 37 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, 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 21st January 2013, 05:06 PM   #361
diyAudio Member
 
Join Date: Feb 2009
Haven't fiddled with my EZDac for a while, but was looking at the circuit designs the other day. The way I have it configured is as designed but using a balanced transmitter board to take the output to a balanced pre amp. Seems a bit convoluted to take the balanced current output of the PCM1798, convert it to a single ended signal then convert it back to a balanced signal. Anyone think of a better way to do this? Audio Note use transformers in their kit for the I/V circuitry but they only have a single ended output from their AD1865 DAC. Is there a similar solution for the balanced output of the PCM1798?
  Reply With Quote
Old 21st January 2013, 06:43 PM   #362
6h5c is offline 6h5c  Netherlands
One Seriously Addicted to Audio and Electronics
diyAudio Member
 
6h5c's Avatar
 
Join Date: Apr 2004
Location: Heerhugowaard
That's a bit too complex indeed, especially since the DAC already has balanced outputs.

If you leave the I/V resistors R23 and R24 in place and add another inverting opamp, you have a balanced output right there. Just ground the + input and split it by removing R26 and R27 and duplicate the circuit.

You could use a transformer with dual secondaries, and ground the center tap, then you'll have a balanced output as well.
__________________
Gonna buy my little girl a pink soldering-iron
The new DOS-CFP board is out!
  Reply With Quote
Old 22nd January 2013, 09:59 AM   #363
diyAudio Member
 
Join Date: Feb 2009
Something like this :-Balanced Output.pdf
  Reply With Quote
Old 22nd January 2013, 12:02 PM   #364
paulb is offline paulb  Canada
diyAudio Member
 
Join Date: Jun 2001
Location: Calgary
No, you have positive feedback - you have + and - inputs reversed on the lower op amp.
  Reply With Quote
Old 22nd January 2013, 12:30 PM   #365
diyAudio Member
 
Join Date: Feb 2009
oops. This then? :- Balanced Output.pdf
  Reply With Quote
Old 22nd January 2013, 03:25 PM   #366
diyAudio Member
 
Join Date: Feb 2009
R25 & R26 would be 100R and R28 and R34 would be 2k0. I was thinking of using LME49720-HA for the op amps.
  Reply With Quote
Old 14th March 2013, 03:31 PM   #367
diyAudio Member
 
merlin2069er's Avatar
 
Join Date: Sep 2008
Location: Toronto
Blog Entries: 1
Send a message via MSN to merlin2069er
What bitrate does the ezdac handle? I'm looking at getting a new usb to spif transport.

Can it do 24/96k or larger?
  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


Similar Threads
Thread Thread Starter Forum Replies Last Post
F3 Builders Thread Melon Head Pass Labs 523 31st May 2014 03:05 PM
EZDAC is singing now!!! ezkcdude Digital Source 217 11th December 2011 06:45 PM
A-X IP Issues (split from Builders thread) tomchaoda Pass Labs 107 16th October 2011 02:05 AM
ezDAC chipsets xaudiox Group Buys 0 27th May 2009 06:45 PM


New To Site? Need Help?

All times are GMT. The time now is 11:54 AM.


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