Re: randomized white noise = white noise?
- From: James Waldby <j-waldby@xxxxxxxx>
- Date: Fri, 26 May 2006 23:23:13 -0600
James Waldby wrote:
....
The number of instructions almost doubles (from 76 to 141) and....
the total cycles more than doubles (from about 77 to about 160,
due to 4 brne and 16 ldd 2-cycle instructions) but still is fast
enough, at 62500 loops per second (given a 10MHz clock), to produce
your desired 44100 outputs per second.
Now I see from an earlier post you said 50ns instruction time;
20 MHz would give about 125000 loops per second max.
Also, I seem to recall you wrote something about using
R-2R with 1% resistors, but don't remember how many bits of
output you were planning on, and how many units you plan to
produce. If the latter number is big, you might use the
faster 16-bit (rather than 32-bit) processing and a shorter
DAC (for lower cost) with sample-to-sample LSB adjustments
to compensate for truncation. [Was there a thread re that,
a while back?]
-jiw
.
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- Re: randomized white noise = white noise?
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