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Triple pole analog switch by cmos?

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Electric_Shock

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Triple pole analog switch by cmos ?

I want to use cmos to design a single pole triple throw to choose 3 different voltage level: VDD, Vcm, VSS like in the picture. How can I do that ? Untitled.jpg
 

Re: Triple pole analog switch by cmos ?

Hi,

use a 4:1 MUX and use three inputs only.

Go to a distributor and use the "analog MUX" selection guide. Or go to a analog MUX manufacturer and do the same.

Klaus
 
Re: Triple pole analog switch by cmos ?

Analog muxes often have high series resistance
(worse for x8 and x16). You can find quad SPST
switches (some, with complementary control
polarities) as low as 1 ohm and one of these plus
a 74HC 2:4 demux could be a superior solution if you
need (say) 100mA out of VDD. You can also
parallel the unused channel to make one of these
sources lower Ron if you like.
 

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