Phil Mendelsohn wrote:
If you think about this for a couple of seconds,
you may
decide to reformulate your opinion. In a low-level signal,
you say the "top" (Most Significant) bits will be zero. In
a high-level signal, though, the bottom 12-bits are all ones.
</lurk>
Sorry - but this is just untrue. A high-level signal has a larger
peak-to-peak voltage/value and hence uses more of the available bits.
The least significant bits will not be pinned at '1' as you appear to
suggest.
[Apologies if I got the quoting wrong.]
cheers
R