# Norator

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{{Short description|Theoretical electronics component}}
right|170px|thumb|Norator electronic symbol
In [electronics](/source/electronics), a '''norator''' is a theoretical [linear](/source/linear), [time-invariant](/source/time-invariant) [one-port](/source/one-port) which can have an arbitrary [current](/source/Electric_current) and [voltage](/source/voltage) between its terminals. A norator represents a controlled voltage or [current source](/source/current_source) with infinite gain.<ref name=Verhoeven>
{{cite book 
|author=Verhoeven C J M van Staveren A Monna G L E Kouwenhoven M H L & Yildiz E
|title=Structured electronic design: negative feedback amplifiers
|year= 2003 
|publisher=Kluwer Academic
|location=Boston/Dordrecht/London 
|isbn=1-4020-7590-1 
|pages=§2.2.1.1 pp. 30–32
|url=https://books.google.com/books?id=p8wDptzCMrUC&pg=PA24}}
</ref>

Inserting a norator in a circuit schematic provides whatever current and voltage the outside circuit demands, in particular, the demands of [Kirchhoff's circuit laws](/source/Kirchhoff's_circuit_laws). For example, the output of an ideal [opamp](/source/opamp) behaves as a norator, producing nonzero output voltage and current that meet circuit requirements despite a zero input.

A norator is often paired with a [nullator](/source/nullator) to form a [nullor](/source/nullor).

A nullator in parallel with a norator is equivalent to a short (zero voltage any current). A nullator in series with a norator is an open circuit (zero current, any voltage).

==References==
<references/>

==External links==
* [http://reference.wolfram.com/applications/insydes/Appendix/Norator.html Norator article from Analog Insydes reference]

Category:Electrical components
Category:Control theory
Category:Signal processing
Category:Analog circuits
Category:Electronic design

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Adapted from the Wikipedia article [Norator](https://en.wikipedia.org/wiki/Norator) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Norator?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.