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Old 20th March 2004, 09:41 PM   #1
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Default Cancel noise in non OS ?

Hi,

does't sampling noise cancel in a non OS DAC with L+ / L- output if the L- is subtracted from the L+ ?

Signal: L+ - L- = 2 x L+
Noise: Noise - Noise = 0

Same R+ / R-

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Old 20th March 2004, 09:46 PM   #2
Pedja is offline Pedja  Serbia
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Default Does it?

Of course not.
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Old 20th March 2004, 11:24 PM   #3
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Why not ?
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Old 20th March 2004, 11:45 PM   #4
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Default Cancel noise in non OS

Hi Bernard,

Quote:
with L+ / L- output if the L- is subtracted from the L+ ?

I had a little misunderstanding for the message.
Can U tell me clear. When I test the DAC I face much different problems. Lets to see that can share the experience or not.

thanks

thomas
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Old 20th March 2004, 11:51 PM   #5
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Hi Thomas,

tell you clear what ? What problems you face ?

My DAC is not finished yet and I am not decided which kind of output to use.

The only thing I know is that the B version of the 7220 sucks.

Bernhard
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Old 21st March 2004, 12:00 AM   #6
Pedja is offline Pedja  Serbia
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Quote:
Originally posted by Bernhard
Why not ?
This is not the signal independent noise, this noise is the part of the signal.
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Old 21st March 2004, 12:42 AM   #7
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Default Cancel noise in non OS ?

Hi Bernard,

I didn't know how to change the PDF to JPEG to show some data of TDA1541a to U for reference in this forum.
I will directly email the file to U,
Pls check mail.

this is some of the German site for me to reference DURING DESIGN THE PCB.

http://users.podolsk.ru/boga/DAC.html

http://hjem.get2net.dk/torbenk/dualdactube.htm

http://www.ndh.net/home/kboehm/T-DAC-P2.htm

THESE WEBSITE CONTAIN SOME OF THIS DATA.


Testing the DAC with a 1khz sinus @ 0dB

Testing the DAC with a 1khz sinus @ -40dB

Testing the DAC with silence

HOPE CAN HELP U.


thanks

thomas
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