Oh, there are definitely edge nuts. I've seen quite a number of posts
regarding measurement and attainment of ultrafast edges.
I've also seen impedance nuts (and of course those who think it is fine
to randomly intermix 75 ohm and 50 ohm cables in systems).
But I have yet to run into a transconductance nut!
On 1/7/2012 8:39 PM, David wrote:
Most of the gear I have expects TTL levels or better. A 0.6 volt RMS
sine wave (1.2 volts peak to peak) could be a problem. As far as
ringing, I would design something with back termination and slew rate
limiting and expect the receiver to terminate to ground which is
almost always the situation. I looked at the TADD-3 design and it
sacrifices back termination impedance for signal swing which results
in ringing but I presume not too much if people were using it
successfully.
If there are time nuts then why not impedance, edge, and
transconductance nuts?
On Sat, 07 Jan 2012 17:11:59 -0800, ed breya<[email protected]> wrote:
Most gear probably won't care whether it's sinusoidal or "square" as
long as the amplitude is right, but if you try to send square waves,
then the question is how square do they need to be. Sharp edges may
convey better timing information, but may also cause ringing and
other effects. I think reasonably clean sine waves or "highly
rounded" square waves are best, and easiest to send around, and you
know how much bandwidth is needed.
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