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# There's Nothing Simple about that Wire Loop

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ashvin 787
6/23/2015 5:15:20 AM
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Re: "Smple" opamp circuits
thanks for the post

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Victor Lorenzo
4/16/2015 4:26:35 AM
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Re: "Smple" opamp circuits
Thanks for the link. It is interesting as a short introduction for people with no prior knowledge about rogowski coils and current probes.

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MeasurementBlues
4/15/2015 5:31:58 PM
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Re: "Smple" opamp circuits
Steve Sandler wrote about Rogowski coils on EDN.

Measure small impedances with Rogowski current probes

edn.com/design/test-and-measurement/4427931/Measure-small-impedances-with-Rogowski-current-probes

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Victor Lorenzo
4/12/2015 6:34:08 AM
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"Smple" opamp circuits
Thanks for the post, Bill.

I agree with you, we need to be able to start working with simplified models and create flexible enough designs. This way we can incorporate new functionalities as we move to more complex models.

One example is the Rogowski Coil. It's model can be as simple as the one described in wikipedia:

But real world coils have construction imperfections and some other factors come into play.

Designing the integrator for the coil is also a non trivial task when looking for linearity, frequency response and stability.

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