Analog Integrated Circuits and Signal Processing

, Volume 65, Issue 1, pp 123–129 | Cite as

First-order voltage-mode all-pass filter employing one active element and one grounded capacitor

  • Dalibor BiolekEmail author
  • Viera Biolkova


A new circuit topology of first-order voltage-mode all-pass filter providing high-input and low-output impedances is described. The filter consists of only one grounded capacitor and one active element, namely VD-DIBA (Voltage Differencing-Differential Input Buffered Amplifier), with the possibility of electronically tuning the natural frequency. The filter is assembled from commercial integrated circuits, and the frequency responses measured are compared with the theoretical characteristics.


All-pass filter VD-DIBA Voltage mode 



Research described in the paper was supported by the Czech Grant Agency under grants Nos. 102/08/0581, 102/09/1628, and by the research programmes of BUT No. MSM0021630503 and UD Brno No. MO FVT0000403, Czech Republic.


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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Department of Microelectronics/EEBrno University of Technology/University of Defence BrnoBrnoCzech Republic
  2. 2.Department of Radio ElectronicsBrno University of TechnologyBrnoCzech Republic

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