On 08/24/2012 12:07 AM, Bob Camp wrote:
Hi
In general, saturated logic (TTL / CMOS) will do better than non-saturated (ECL
/ LVDS). Faster with saturated generally = better, provided it's silicon. Once
you go to high mobility semiconductors the 1/f noise picks up. Yes, you need a
quiet supply. How quiet is going to depend on your edge rates, input
frequencies, phase noise offsets, the coupling circuit, and the logic used. Put
another way - you need to test your circuit. There are bits and pieces of that
very limited summary scattered across several hundred papers and data sheets.
NIST has only made a few papers on it, and to some degree it is
inconclusive. Also, it doesn't give good hints on more current logic as
it was made ages ago.
Cheers,
Magnus
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