Definition of Operational Amplifiers

  • Johan Huijsing
Part of the The Kluwer International Series in Engineering and Computer Science book series (SECS, volume 605)


In 1954 Tellegen introduced the concept of a universal active network element under the name of “ideal amplifier” [1.1]. The name “nullor”, generally accepted now, was given to it by Carlin in 1964 [1.2]. The symbol of a nullor is shown in Fig. 1.1.


Output Port Input Port Operational Amplifier Passive Component Output Terminal 
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Copyright information

© Springer Science+Business Media Dordrecht 2001

Authors and Affiliations

  • Johan Huijsing
    • 1
  1. 1.Delft University of TechnologyThe Netherlands

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