Scopes & FPGA - homebrew oscilloscope solutions

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I've been scouring the web looking at different homebrew oscilloscope solutions and have found ALL of the projects that are capable of greater than a few hundred kHz are using an FPGA or CPLD.

Why is that? What would a uC need to offer in order to fill this block of the designs?

Thanks,
-Rocko
 

Re: Scopes & FPGA's

It only has to do with how fast the microcontrolle or fpga (+ADC) can sample and handle (store) the data for a certain price of the components.

If you do a project with a certain desired functionality, you want to do that for the minimum cost that fulfills the needs. I suppose the higher sample rates require a too expensive micro-controller (or adds too much external components anyway, like fast ADC's, external memory, ... --> these you probably need also with fpga/cpld designs).

Even with the FPGA/cpld designs, probably a microcontroller is involved anyway for the visualisation/communication/flow-control-software...

Stefaan
 

Re: Scopes & FPGA's

Ahh I see.

Thanks,
-Rocko
 

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