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What is this circuit/device called?

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pagliacci19

New Member
I am working on an experiment where multiple microscale electronic devices are being tested in a vacuum environment. For each device, I need 4 contacts:

-2 for applying current through the device
-2 for measuring voltage across the device

There will be a large number of devices (for good statistics it may be as high as 50-100, or higher), but the number of electronic feed-throughs for the vacuum chamber is fixed. Of course, I can design a circuit that allows the maximum number of devices to be measured with a fixed number of leads, but I know there should be some way to digitally address each device, and connect to a larger number of devices.

This may seem like a silly question, but what is this device called? I am searching right now, but until I get the terminology for the function I require it is pretty perplexing...Thank you for suggestions.
 

ericgibbs

Well-Known Member
Most Helpful Member
This may seem like a silly question, but what is this device called? I am searching right now, but until I get the terminology for the function I require it is pretty perplexing...Thank you for suggestions.
hi,
Its not perplexing, its multiplexing or demux.

Look at the HEF4067 analog selector ic as a starting point.
 

MikeMl

Well-Known Member
Most Helpful Member
The basic measurement set up "four point probe", usually used to measure resistivity of films.
 
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