[time-nuts] Frequency Counter Choice

[Bob kb8tq]

Hi

…. and now I have a copy :)

Bob

> On Oct 22, 2020, at 6:12 PM, Attila Kinali <attila at kinali.ch> wrote:
> 
> On Thu, 22 Oct 2020 13:29:07 -0400
> Bob kb8tq <kb8tq at n1k.org> wrote:
> 
>> There is a paper running around behind the IEEE paywall by Collins that details
>> one approach to designing multi-stage limiters. There are other ways to do it. 
>> The key is to not go to crazy all in one stage. 
> 
> <self-advertisment>
> You can find a modern, more accurate version of Collins result
> in [1]. While most formulas in there give the noise up to some 
> proportionality factor, all the information to calculate the noise 
> level is in there. The big difference to Collins here is that this 
> result is exact if you use all harmonics up to infinity (which is 
> easy) or can break up with a known error if you don't want to go 
> that far. Collins uses a trapezoid approximation throughout and thus
> over-estimates the noise contribution of low-gain stages, which
> are the first stages thus contribute to a relatively large error
> in the calculation.
> </self-advertisment>
> 
> 
> 			Attila Kinali
> 
> [1] "A Physical Sine-to-Square Converter Noise Model"
> by yours truly, IFCS 2018
> http://people.mpi-inf.mpg.de/~adogan/pubs/IFCS2018_comparator_noise.pdf
> 
> -- 
> <JaberWorky>	The bad part of Zurich is where the degenerates
>                throw DARK chocolate at you.
> 
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