[sdiy] VCO waveform logic selection

Jim Patchell patchell at cox.net
Tue Sep 11 15:16:38 CEST 2007

Personally, I prefer using analog switches more along the lines of the 
DG201.  This is mostly because they are simpler to use because they will 
run off of +/- 15 volts.  They also have TTL compatible inputs and 
should work just fine with 3 volt logic.


jbv wrote:
> Hi guys,
> Let's say I have a vco module that outputs various waveforms at +-5V.
> And I want to digitally select 1 of these ouputs to send it to the input
> of another module. What is the best way to proceed ?
> would some analog mux like the 4051 do, if its power supply is set
> to +-7.5V ? If yes, how to handle logic selection signals, especially
> if they're generated by 3V logic uC ?
> Thanks in advance,
> JB
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