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bear7679
Joined: 18 May 2004
Posts: 135
Helped: 21
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 14 Jul 2004 10:49 idle tone in sigma delta DAC |
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| I have designed a sigma delta DAC. When I use it to hear music, I can hear the idle tone. But I don't know how to get off it. who can help me?
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bamboo
Joined: 16 Jun 2004
Posts: 25
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| 15 Jul 2004 10:34 Re: idle tone in sigma delta DAC |
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You may add the dither circuit in ADC or use multibit modulator if you
use one-bit modulator in your ADC.
you may get more information in this book :
"Delta-Sigma Data Converters: Theory, Designand Simulation"
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bear7679
Joined: 18 May 2004
Posts: 135
Helped: 21
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| 16 Jul 2004 1:07 Re: idle tone in sigma delta DAC |
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Dear bamboo:
I have read that book, but I don't know which type dither to use and how to choose the amplitude of the dither. Can you tell me about that?
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