[hpsdr] Cascading A/D Converters

[alex]

no i think that it would work, you divide the 1ghz into 5 so you have 40 
mhz at 72 deg phase, so each adc did every 5th sample

you would need a fpga that worked at 1ghz though
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> rstasiak at sympatico.ca wrote:
>> You may be interested in this video blog in which describes a process 
>> of cascading five Analog Devices AD8298-40 (40 mhz) dual a/d converters
>> under the control of an Altera FPGA to get a a 1 Ghz sample rate 
>> system.  The system is used in an low end oscilloscope manufactured 
>> by Rigol.
>>
>> It seems to me that a similar system of cascading a/d convertors 
>> could be used in the HPSDR environment to extend the frequency range 
>> of systems.
> Hmmmm, oscilloscopes do not have the requirement that sampling must be 
> time-continuous...
> I don't think that that trick could work for an SDR, but then I could 
> be wrong... sometimes it happens...  :-)
>
> 73  Alberto  I2PHD
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