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

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Abstract

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.

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Acknowledgments

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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Authors and Affiliations

  1. Department of Microelectronics/EE, Brno University of Technology/University of Defence Brno, Udolni 53/Kounicova 65, Brno, Czech Republic

    Dalibor Biolek

  2. Department of Radio Electronics, Brno University of Technology, Purkynova 118, Brno, Czech Republic

    Viera Biolkova

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  1. Dalibor Biolek
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  2. Viera Biolkova
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Correspondence to Dalibor Biolek.

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Biolek, D., Biolkova, V. First-order voltage-mode all-pass filter employing one active element and one grounded capacitor. Analog Integr Circ Sig Process 65, 123–129 (2010). https://doi.org/10.1007/s10470-009-9435-2

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  • DOI: https://doi.org/10.1007/s10470-009-9435-2

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