[time-nuts] Divide by 3

[Nick Sayer]

> On Jun 8, 2016, at 9:59 AM, Charles Steinmetz <csteinmetz at yandex.com> wrote:
> 
> You can achieve substantially lower jitter (phase noise) with a regenerative divider, which also allows you to divide by 3/2 for a 10MHz output.  I've built several like that, and they work extremely well.
> 
> There are simpler divide-by-three logic circuits (generally, the simpler the circuit the closer to an exact 50% duty cycle and the lower the jitter).  See the attached image for one approach.
> 

Very nice! That one also simulates properly on CircuitLab without the delay gates in the output feedback. I tried adding the delay gates back in, and it didn’t change, but I can imagine that’s just because it’s a simulator.