[Discuss-gnuradio] F2V converters

[Kimsey Pollard]

Just looking at Analog Devices
http://www.analog.com/UploadedFiles/Data_Sheets/136379871AD650_c.pdf
They have the AD650 which is ~$7 to $32 depending
on specs. 
The AD650 has the equivalent of about 14 bit resolution.
The AD6645 ADC chip at ~$65 does 14bit A2D at 80msps. 
Not sure how that fits with the following:

Kimsey


> Hi again
> Some while ago there was an idea about using a F/V convetror before the
> A/D section,at the front-end section;as you know one of the main problems
> building the ideal SDR is the slow A/Ds ( although there are some really
> high speed ones, but still way to go till the ideal SDR ! )
>  So it is a great job making a trick to overcome this dilemma. i
> once wrote about it to the discuss but it was not accepted so much
> :http://mail.gnu.org/archive/html/discuss-gnuradio/2003-05/msg00005.html
>  
> if we think of a F/V cheap as a FFT generator one, then not only the
> required bandwidth and therefore the required sampling rate is reduced
> but also we could do some demodulations much more easier, with respect to
> the fact that today most of modulations are frequency domain based.
> in the case of non-frequency based demodulations  such as AM or ASK,
> just an IFFT (inverse FFT ) will solve the problem,regenarating the
> original signal,then this could be a ideal and universal radio
> paltform.
> please take a little while, thinking about this idea, and write me your
> feedback.
>  
> thanks
> --Saeed
>
>
>
> ***********************************************

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