Setting Up a Current Source: Parallel Resistances

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Discussion Overview

The discussion revolves around the setup of a current source, specifically addressing the configuration of resistances in parallel versus series. Participants explore the implications of these configurations on current distribution and the relevance to circuit theory, including references to Norton and Thevenin equivalent circuits.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant suggests that resistances need to be in parallel for a current source because current divides in parallel circuits.
  • Another participant notes that in a series circuit, the current remains the same, implying that a series configuration may not be useful for a current source.
  • A participant questions whether the discussion relates to Norton and Thevenin equivalent circuits, indicating a potential theoretical framework for understanding the topic.
  • There is a request for clarification on what is meant by "set up" a current source, with a suggestion that it may pertain to simulation contexts.

Areas of Agreement / Disagreement

Participants express differing views on the necessity and implications of using parallel versus series configurations for current sources, and the discussion remains unresolved regarding the best approach.

Contextual Notes

Some assumptions about the definitions of current sources and circuit configurations may be implicit, and the discussion does not fully explore the mathematical or theoretical underpinnings of the claims made.

fusion911
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To set up a current source why do we need to place the resistances in parallel rather than than placing them in series.
 
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well I think that's because the current divides in the parallel circuit.

It would be same throughout in the series circuit, so there might be no use for a sonnection in the series. And it also depends on the amount of current needed through the circuit.

I think
 
fusion911 said:
To set up a current source why do we need to place the resistances in parallel rather than than placing them in series.

Welcome to the PF. Are you asking about Norton and Thevinin Equivalent circuits?

http://en.wikipedia.org/wiki/Thévenin's_theorem

.
 
fusion911 said:
yes
the very same

Ok, then did the link answer your question? And what do you mean by "set up" a current source? Do you mean in a simulation?
 

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