[sdiy] How droopy is too droopy in a S & H?

[mark verbos]

On Jan 26, 2009, at 4:05 PM, Veronica Merryfield wrote:

> Not sure if this will help, but figures out there (chips to  
> discretes) range from 1mv/s to 5mv/s in our field of interest.
>
> If this is for an analogue synth to hold the note, then often it  
> needs to hold it once a key is realeased, so unless you have  
> extremely long release times, it will be ok. If this is hold a note  
> for a long time, then droop is going to be an issue - I could not  
> find anything much better than 1mv/s in an analogue solution.  
> However, a pic like a/d->d/a will hold for as long as it is powered  
> providing the resolution of the converters is acceptable.
>
> What's the application?
>
> Veronica
>

quad analog shift register. seems like 2 isn't too bad in a world  
where 1 is the best you can get, but it still seems bad to me.

Mark