[Cryptech Tech] Alpha status

[Peter Stuge]

Jacob wrote:
> ------FIX----------
> Put C4 right at the entry of the analog region, and connect its terminal to 
> AGND. This will establish a smaller area current loop between the analog PS 
> and its consumers. The filter R6-C4 will serve as the isolator between the 
> GND and AGND.
> -----------------------------------------

Ie. also remove the polygons currently connecting GND and AGND.


> --------- FIX-----------
> Install a fast optocoupler at the output of U2. This will isolate the 
> DIGITIZER/AGND from the DIGITIZER_FPGA/GND. Per scope pictures at the wiki, 
> the DIGITIZER frequency is 1-2 MHz. A fast 10 mbps optocoupler (several 
> vendors have such parts) will nicely do the job here.
> ----------------------------------------

I agree that these two fixes would be good improvements.


//Peter