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D/A Converters
On 1 Jul 2004 00:57:51 GMT, (Marcus) wrote:
I suspect it is impossible for the components to be matched
better than maybe 20-bit precision.
Which is why no one tries............
I looked up the dCS converter and I can see it has some technology
to cope with this problem. It is also known as scrambling,
randomization, or averaging, which is similar to what the IC
foundries do.
No, it's known as oversampling.
AFAIK, all 20- to 24-bit DACs (monolithic or
discrete) are based on a multi-bit core DAC with randomization,
and of course oversampling is in place. In that sense, they are
quite close in architecture.
All '24/192' DACs (including the dCS units) are in fact between 1 and
5 bits in basic resolution, and gain their 24-bit rating by high
oversampling. This is not a new technique, as the very first
Philips/Marantz CD players back in 1983 used a 4x oversampling 14-bit
DAC to achieve 16 bit resolution.
--
Stewart Pinkerton | Music is Art - Audio is Engineering
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