ivp wrote:
>>> Op-amps ?
>>
>> Care to elaborate? Example circuits? :)
>
> Er....um.....I'm exercising my right to remain silent
>
> So sorry, was thinking buffers not switches.

Heh. It's alright. :)


> BTW, presumably
> these do have to be electronically-controlled selectors ?

Preferably. Mechanical user selectable option is on the table, but is far 
far less attractive.

Vitaliy 

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