Re: Re: Keeping accurate time

On Jan 18, 2008 9:01 AM, shred445 <shred444@...> wrote:
>  [...]
> Thank you guys for all your responses. It believe the DCO will be
>  accurate enough, considering i will be receiving the time at least
>  once every 4 minutes.

If you are getting updates that frequently, you should be able
to tune the DCO to increase the accuracy between updates.

I have no idea how complex you want to make this, but tuning the
underlying osc freq would be preferable to snapping the time
every N minutes. If you tweak the osc, you can make sure time never
runs backwards, which can avoid all sorts of bizarre problems later.

Applying control system loop design concepts to this can be
helpful, in my experience.
--
Andy