Re: [Discuss-gnuradio] 2.5 GS/sec 14-bit A/D converter

[Tim Ansell]

So where do we request free samples from :P

The question is how would you get this into a computer? If we round it
up to 16 bits, it makes 4.6 Gigabytes per second. Would a FPGA even be
able to keep up? Could people a lot smarter then me, discuss how this
chip could even possibly be used?

Tim Ansell

On Wed, 2005-04-27 at 12:54 -0700, Eric Blossom wrote:
> The punchline is towards the end of this article:
> 
> http://rfdesign.com/mag/radio_new_technology_facilitates
> 
>   TechnoConcepts' RF to digital converter is the first 5 GHz carrier
>   speed RF to digital converter capable of direct conversion of a 5 GHz
>   RF carrier, eliminating all analog IF circuits. This receiver is based
>   on a very high speed 5 GHz delta-sigma converter that digitizes
>   signals by modulating the analog input (radio signal) into a
>   high-speed 1-bit digital datastream. The datastream is then digitally
>   processed on the same IC to produce a high-resolution multiple bit
>   word stream sent at a slower data rate. This is the first device to
>   completely eliminate the need for conventional radio receiver
>   downconverters and the associated external analog components. This RF
>   to digital converter is a closed-loop system in which the order of the
>   loop and the input bandwidth may be changed to achieve the desired
>   resolution. A narrow bandwidth results in higher resolution than a
>   wide bandwidth.
> 
> 
> 
> Parameter                                   GaAs            SiGe
> 
> Maximum clock frequency                             > 5 GHz         > 15 GHz
> SINAD (signal to noise+distortion)          > 70 dB         > 110 dB
> Eff. resolution bits at 2.5 GHz carrier:      14 bits         18 bits
> 10 MHz BW                                     11 bits         14 bits
> 
> 
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