Hi > On Jul 30, 2020, at 5:11 PM, Hal Murray <hmur...@megapathdsl.net> wrote: > > >> I'm sure there are a lot of transistors in their IC to handle all the phase >> tracking and time decoding. > > They aren't doing phase tracking, just decoding time data. All that crap > about Atomic Time is just advertising BS. > > Moore's Law applies to transistors. It doesn't matter if you use them for > analog or digital. > > There is a wonderful concept: Pad Limited.
How about “dicing limited” ? Turns out that your silicon wafer always needs to be chopped into pieces. That’s a messy mechanical process. It really hasn’t changed a lot over decades. A die that’s 1 mm on a side is about the smallest economical part. Go smaller and you “saw cut” simply is throwing away more silicon …. Bob > Suppose your design takes N pads > for bond wires to the outside world. Start with the logic for your design. > Squish it down to a sensible shape. Now put the pads around it. Pads are > big > (relative to transistors). If they bump into each other, you may have empty > room left over inside the pad ring. In a mature process, the yield is close > to 100% and doesn't depend on how many transistors you put in that empty > space > so you might as well use it. > > If you don't have empty room today, wait a bit. Transistors are shrinking > faster than pads. > > Watches are the classic example. They have lots of pads because each segment > on the display needs its own wire. So you get watches that can keep track of > days of the month and know about leap years. > > -- > These are my opinions. I hate spam. > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
