Is It Possible?
MAS is Already in Common Use
- Telephone analog modems - to 56 Kb/s
- Telephone DSL modems - to 1.5 Mb/s
- Gigabit Ethernet - to 1000 Mb/s
The technology to do high-speed multiple-amplitude
signaling exists today.
The first PCB applications will be large backplanes
with substantial dielectric loss.
If any of you doubt the practicality of MAS, let me remind you that there was a time when
people thought the sixteen-point QAM constellation in the 2400-bps V.22bis telephone modem
was exotic and difficult to implement.
We are way past that point now.
The only factor holding back the development of MAS transceivers for backplane
applications today is market demand. When sufficient demand exists for multi-gigabit
serial transceivers that can operate at long distances, I'm sure MAS chips will be
developed to fill that need.
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