Active Filters

  • Stephan J. G. Gift
  • Brent Maundy


手机体育投注平台A filter is an electrical network that passes signals within a specified band of frequencies while attenuating those signals that fall outside of this band. Passive filters utilize passive components, namely, resistors, capacitors and inductors, while active filters contain passive as well as active components such as transistors and operational amplifiers. Passive filters have the advantage of not requiring an external power supply as do active filters. However, they often utilize inductors which tend to be bulky and costly, whereas active filters utilize mainly resistors and capacitors. Additionally, active filters can produce signal gain and have high input and low output impedances which allow simple cascading of systems with little or no interaction between stages. This chapter discusses the principles of active filter operation and treats with several types and configurations of active filters. At the end of the chapter, the student will be able to:

Supplementary material


  1. R. Schaumann, M. Van Valkenburg, Design of Analog Filters, 1st edn. (Oxford University Press, 2001)
  2. T. Kugelstadt, in Active filter design techniques in op amps for everyone, ed. by R. Mancini, (Texas Instruments, 2002)
  3. A. Waters, Active filter design (Mc Graw Hill, 1991)

Copyright information

© Springer Nature Switzerland AG 2021

Authors and Affiliations

  • Stephan J. G. Gift
    • 1
  • Brent Maundy
    • 2
  1. 1.Electrical and Computer EngineeringThe University of the West Indies, St. Augustine CampusSt. AugustineTrinidad and Tobago
  2. 2.Electrical and Computer EngineeringUniversity of CalgaryCalgaryCanada

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