super fast divide-by-N

[CBFalconer]

Thomas Magma skrev:
.... snip ...

I'd think that whenif you find something that will divide 1GHz to
80MHz, it'll be bigger more expensive and more trouble than just
adding a 80MHz oscillator ...

And you will find that syncing that with the 1 GHz clock is more
accurate than a countdown. There may be some 1 clock 1/2 period
jitter because there will be some sort of error in 80Mhz oscillator
wrt the 1 Ghz rate. The overall rate will be as accurate as the 80
Mhz oscillator. It also means you only need 1 D flip-flop that can
clock at 1 Ghz.