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Author Topic: simulate : Build a precise dc floating-current source --- base on GIC filter  (Read 1756 times)
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DreamCat
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« on: August 26, 2010, 06:12:30 06:12 »

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, 10:03:27 10:03 »

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, 10:27:32 10:27 »

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, 03:08:21 15:08 »

Simulated OK for me!

Proteus file attached.
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« Reply #4 on: September 18, 2010, 07:15:28 19:15 »

I simulated success too.

In this circuit, the R4 must less than R5.

It is very precise, very good linearity.
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