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Message from discussion GA144 polyForth
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rickman  
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 More options Oct 17 2012, 1:40 pm
Newsgroups: comp.lang.forth
From: rickman <gnu...@gmail.com>
Date: Wed, 17 Oct 2012 13:40:15 -0400
Local: Wed, Oct 17 2012 1:40 pm
Subject: Re: GA144 polyForth
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On 10/17/2012 2:05 AM, Howerd wrote:

> Hi Rick,

> I've chopped the bulk of the reply post because it is getting way too
> long...

>>> X is  " how can I use the GA144's VCO as a very high resolution ADC?"
>> BTW, perhaps you should share with the Green Arrays people
>> that their ADC can't measure with high resolution.
> No, you can't use the VCO as a VERY high resolution ADC ( 30 bits ).
> But you can, I think, use it to measure down to this level if you use
> the counter directly, and not as a conventional ADC.

I think you need to read a bit more about the GA144 and how the ADC
works.  There is no limit to the resolution of the ADC data word.  Once
you actually understand how the ADC works, you will see that.  But as
long as you keep talking about the constituent parts, you will not see it.

>> You don't want to measure voltage, charge *or* current, you want to measure ANALOG.
> Exactly. Voltage and current are scalar quantities, quantum mechanics
> shows that electric fields are vectors, so current flowing in a wire
> is a 1 dimensional representation of a 2 or more dimensional field.
> If you measure voltage with chips that are desinged to measure
> voltage, you will only see voltage.
> So, yes I want to measure ANALOG, whtever that is.

Hey, ANALOG is *your* term, not mine!  Go back to your previous post,
you said, "Y is  " how can I use the GA144's VCO to measure very small
analog changes on its input pin with very high resolution?" Answer - see
above."  So what is an ANALOG that you are measuring changes in?

Rick


 
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