[time-nuts] crunching numbers from XOR phase detector

[Orin Eman]

Have you tried the 74HCT9046?  They claim no dead zone.  Note - seems to be
HCT only.

Orin.

On Wed, Jan 4, 2012 at 9:32 AM, Brian Justin <wa1zms at att.net> wrote:

> Be very careful of the FPD in the 4046. It has a dead-zone when the phase
> error
> is at or very close to zero.  Some versions of the chip claim to have
> "improved"
> that dead-zone. But it's still there to some degree, at least in all the
> versions I have tried.
>
> -Brian, WA1ZMS
>
>