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[Discuss-gnuradio] F2V converters

From: Kimsey Pollard
Subject: [Discuss-gnuradio] F2V converters
Date: Wed, 25 Jun 2003 14:57:04 -0400

Just looking at Analog Devices
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:

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.


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