Author Topic: Design your own SMU  (Read 2026 times)

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Offline ggtxTopic starter

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Design your own SMU
« on: April 25, 2017, 01:21:59 pm »
Hi all, just discovered this amazing forum :-) pleased to meet you all.
Since time I am curious to deep understand how a SMU  are done and designed, and I found the video from Dave where is opening the box of the Keithley 2400:
In another topic this user aims to build its own SMU: http://www.edaboard.com/thread364430.html with a reply discouraging him :-) Someone knows something like tutorials, thesis, datasheet or something more detailed about the idea?
Thank you in advanced. GTx.
« Last Edit: April 25, 2017, 02:44:34 pm by ggtx »
 

Offline Avacee

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Re: Design your own SMU
« Reply #1 on: April 25, 2017, 01:25:35 pm »
Link doesn't work - remove the "," at the end.

Without comma:  http://www.edaboard.com/thread364430.html
 

Offline helgel

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Re: Design your own SMU
« Reply #2 on: August 21, 2018, 12:55:41 pm »
I've also played with the idea of designing a SMU. Found that it's way above my competence level... However, a few months ago I started to collect info, links etc. It's just unstructured info, but might be useful for others. At least I learned a lot.

https://poormanssmu.wordpress.com/research/
« Last Edit: December 02, 2018, 10:49:26 am by helgel »
 

Offline schmitt trigger

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Re: Design your own SMU
« Reply #3 on: August 21, 2018, 01:10:04 pm »
Welcome to the forum,
any information about SMUs you find, please share it here.
 

Offline exe

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Re: Design your own SMU
« Reply #4 on: August 21, 2018, 05:47:26 pm »
I'm not building an SMU, but a PSU with some sinking capability and multiple (dual) current range and small output capacitance.

I'd say the first step to build an SMU is to define desired specs (voltage/current ranges, set/readback resolution and accuracy, bandwidth, protection, etc). As I see it, you just take a "regular" power supply and "upgrade" it until it meets your specs.

I wouldn't go down to microvolts and nanoamps for the first build. Also don't expect it have 5+digit accuracy. Reading voltnuts' articles helps a lot in understanding challenges.
 

Offline David Hess

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Re: Design your own SMU
« Reply #5 on: August 21, 2018, 07:35:26 pm »
Also take a look at old documented curve tracer designs.  They faced a lot of the same problems and solved them in the same ways.
 


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