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Max The Magnificent
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Re: Giggling
Max The Magnificent   3/20/2014 10:21:29 AM
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@ChristophZ: I was giggling constantely remembering the many many hours sitting in front of the computer moving around stupid lines with dump tools.

When I started out in the early 1980s, you didn't even have the ability to *move* tracks -- you could  place vias and you could use the digitizer to add track segments -- but all you could do was *add* or *delete* things -- we dreamed of being aboe to *move* things LOL

ChristophZ
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Giggling
ChristophZ   3/20/2014 3:47:44 AM
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I have to tell you that the one thing that really took my breath away is something called

During watching this videos I kept my breath but the only thing I was able to do was constantly giggle. You look at it, it's so simple so intuitive (sorry to use this word) it feels smart. And I was giggling constantely remembering the many many hours sitting in front of the computer moving around stupid lines with dump tools.

Max The Magnificent
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Re: Differential
Max The Magnificent   3/19/2014 9:28:35 AM
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@zeeglen: Pretty cool how it keeps differential pairs together right up to the end of the run.

The EDA tools available to us these days (both front- and back-end) simply blow me away. When you think about the raw computation involved in dynamically moving tracks and vias around -- mind-boggling is all I can say.

Max The Magnificent
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Re: Differential
Max The Magnificent   3/19/2014 9:26:58 AM
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@zeeglen: Pretty cool how it keeps differential pairs together right up to the end of the run.

Also the way in which it wraps/bends the ends of the differential pair tracks around the pads and vias to fine-tune the lengths and phases.

zeeglen
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Differential
zeeglen   3/19/2014 9:05:29 AM
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Pretty cool how it keeps differential pairs together right up to the end of the run.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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