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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Re: How about a nope, nope, nope.. posted by jneutron on April 23, 2004 at 12:39:17:
[ My thinking on a/d dithering is the addition of a triangular wave dithering signal to the analog one you wish to convert, with an amplitude level equal to twice the lsb. ]Actually, the dithering process for the more advanced ADC's use gaussian noise dither at a peak amplitude of two LSB's. Other aspects are shaping the frequency spectrum of the noise, usually by reducing the midrange spectral content, and increasing the HF content.
There are many proprietary methods of dithering and noise shaping the dither for a signal for an ADC, most of which are patented.
It is interesting indeed that the jitter that was most effective for Nordmark was random time interval jitter, which is essentially a guassian noise profile if truly random.
Jon Risch
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Follow Ups
- Re: How about a nope, nope, nope.. - Jon Risch 21:48:28 04/23/04 (1)
- Re: How about a nope, nope, nope.. - jneutron 06:08:21 04/26/04 (0)
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