Digital Drive

Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it.

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RE: Sabre DAC not 32-bit?

Posted by Tony Lauck on July 29, 2010 at 10:51:31:
The function behind the bits is signal to noise ratio, and this is only meaningful in the context of a given bandwidth. Basically, for a given channel as the bandwidth is increased the noise also increases. This is true for white Gaussian noise in an analog system, as well as "shaped" noise created by a digital converter. For a meaningful comparison between two systems that have different bandwidths one needs to provide some weighting of the noise. Conventionally this has been done by measuring the noise in the range 0 - 20 kHz. Better is to provide a complete noise spectrum as this will allow for a range of comparison metrics.