Definition of Operational Amplifiers

  • Johan HuijsingEmail author


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 Passive Component Output Terminal Voltage Follower 
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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Faculty of Electrical Engineering Mathematics and Computer Sciences (EEMCS)Delft University of TechnologyDelftNetherlands

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