passlabs B1 buffer and buffalo 2 dac - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 26th March 2010, 09:09 AM   #1
Berry is offline Berry  Netherlands
diyAudio Member
 
Join Date: Apr 2004
Location: Netherlands
Default passlabs B1 buffer and buffalo 2 dac

Is it possible to connect the output of buffalo 2 (gnd and +) to the to the unbalanced input of the passlabs B1 buffer ?

Regards,

Berry
  Reply With Quote
Old 26th March 2010, 07:56 PM   #2
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
I don't see why not, assuming that it's a voltage output.

  Reply With Quote
Old 29th March 2010, 03:13 PM   #3
Berry is offline Berry  Netherlands
diyAudio Member
 
Join Date: Apr 2004
Location: Netherlands
Thanx for the answer,

They say what is in the text below, but the input inpedance of the b1 is also very low, or not ?

"The Buffalo II does not include an output stage but is designed to mate with the IVY III current to voltage
stage. It is not recommended to use the Buffalo II output directly, but it is possible. The output can be used
as a voltage source into a high impedance but THD+N will suffer. THD+N as a voltage source is about -
108db whereas when used with a very low input impedance current to voltage stage such as the IVY-III it
can achieve -120db THD+N in mono mode.
Each analog output at 0DBFS is equivalent to a voltage of approximately 92.4% of AVCC in series with
195. So given 3.3VDC AVCC it will be about 3.05Vpp across 195. The output will be DC biased at
AVCC/2. This works out to about 16ma peak to peak at each output. The amount of bias current will depend
of the voltage of the virtual ground."
  Reply With Quote
Old 29th March 2010, 06:23 PM   #4
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Apparently it is optimal into a virtual ground. Instead of a
buffer, I suggest you use a fet operated Common Gate, the
example being the I/V converter in the PL D1.

  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
B1 Buffer and some help please!!!! Malka07 Pass Labs 4 28th May 2012 08:18 PM
B1 buffer pmchoong Pass Labs 1 11th May 2009 06:48 AM


New To Site? Need Help?

All times are GMT. The time now is 05:57 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