[sdiy] Crosspoint Switch [was: Which programable chip?]

[Eric Brombaugh]

On Apr 17, 2009, at 7:22 AM, Ian Smith wrote:

>>
>> Ummm....need to *carefully* check the voltage across the switch:  
>> video is ~
>> 1.5V pk-pk Do NOT assume anything based on the supply voltages.
>>
>> Paul S.
>
> Bugger. In my defense I did this last night when I was half asleep.  
> Well, either way it'll be interesting to see what I can pull out of  
> the thing. Thank you for pointing that out.
> -Ian

Ken Stone's Sequential Switch design puts the analog switch/mux at the  
summing node of an op-amp so that the voltage range of the switch  
doesn't limit the overall range. Maybe you could use something like  
that?

http://www.cgs.synth.net/modules/cgs28_seq_switch.html

Eric