[time-nuts] GPS Locked and Unlocked Performance Comparison

Didier Juges didier at cox.net
Thu Feb 14 05:01:50 EST 2008


Said,

What 24 bit DAC do you have in mind?

I have been looking for a standalone 24 bit DAC in a small package and have
not found anything I liked :-(

Thanks

Didier 

> -----Original Message-----
> From: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] On Behalf Of SAIDJACK at aol.com
> Sent: Wednesday, February 13, 2008 4:11 PM
> To: tvb at leapsecond.com; time-nuts at febo.com
> Subject: Re: [time-nuts] GPS Locked and Unlocked Performance 
> Comparison
> 
> Hello Tom,
>  
> Bruce mentioned there is a validity bit that can be checked 
> for holdover. I wonder if a small micro can be used to hold 
> the EFC voltage steady without much  effort. Or maybe using 
> Super-Caps in the loop filter?
>  
> Or maybe use one of those new 24 bit Sigma-Delta ADC/DAC 
> chips to capture a
> 24 bit word (ADC) and feed that to the 24 bit DAC during 
> holdover. Kind of a
> 24  bit high-precision sample-and-hold circuit.
>  

No virus found in this outgoing message.
Checked by AVG Free Edition. 
Version: 7.5.516 / Virus Database: 269.20.4/1277 - Release Date: 2/13/2008
8:00 PM
 




More information about the time-nuts mailing list