[time-nuts] High rate, high precision/accuracy time interval counter methods

Bob Camp kb8tq at n1k.org
Mon May 9 11:43:19 UTC 2016


Hi

Simple answer: 

You are likely using an NPO cap and it’s not a big deal. 

Bob


> On May 8, 2016, at 9:49 PM, David <davidwhess at gmail.com> wrote:
> 
> How much will dielectric absorption in the capacitor affect the
> accuracy of the result with such a high conversion rate?  I am used to
> dealing with it on much longer time scales and higher resolutions.
> 
> On Mon, 9 May 2016 01:08:05 +0200, you wrote:
> 
>> Am 08.05.2016 um 21:53 schrieb Attila Kinali:
>> ...
>> 
>> Maybe I was too short. We have control over the charging current source,
>> and when we switch it off, the status quo is kept. Then when the ADC is 
>> done,
>> we can simply short the capacitor in the next clock/s to prepare for the 
>> next cycle.
>> 
>> 
>> Attilla, we could discuss that on a sunny evening in Saarbrücken in a
>> beer garden if you like. The season starts :-)
>> 
>> regards, Gerhard
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