Input Stages

  • Johan HuijsingEmail author


The input stage of an Operational Amplifier has the task of sensing the differential input voltage. This process is disturbed by interference signals such as: offset, bias, drift, noise and common-mode crosstalk. The modeling of these signals has been given in Chap. 2. The level of these additive interference signals determines the useful sensitivity of the amplifier. The design of the input stage should aim at low values of these interference signals, while the current consumption should be low, and a large portion of the rail-to-rail range should be available for common-mode signals.


Input Voltage Bipolar Transistor Input Stage Strong Inversion Input Circuit 
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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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