[time-nuts] GPS Locked and Unlocked Performance Comparison
didier at cox.net
Thu Feb 14 05:01:50 EST 2008
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 :-(
> -----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
> 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.
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