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Sonsivri > Electronics > General Electronics (Moderators: o2, pickit2) > simulate : Build a precise dc floating-current source --- base on GIC filter
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DreamCat
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« on: August 26, 2010, 05:12:30 05:12 »
I tried to simulate a current source circuit, but failed.
here is the article from EDN IDEA:
http://www.edn.com/contents/images/633469.pdf

according to article said, the voltage on R5 should be equal to the Vref, but in Proteus simulate, it isn't.

anyone is interesting ?
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solutions
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« Reply #1 on: August 26, 2010, 09:03:27 09:03 »
What values did you use for your R's?

//No, i did not use a dirty word in that question....
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DreamCat
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« Reply #2 on: September 15, 2010, 09:27:32 09:27 »
I'm learning GIC filter, searched on google, and got this article.. but simulate failed.

make be I should other pspice software try it.
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« Reply #3 on: September 15, 2010, 02:08:21 14:08 »
Simulated OK for me!

Proteus file attached.
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DreamCat
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« Reply #4 on: September 18, 2010, 06:15:28 18:15 »
I simulated success too.

In this circuit, the R4 must less than R5.

It is very precise, very good linearity.
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