Electronically controlled high input and low output impedance voltage mode multifunction filter with grounded capacitors |
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| Affiliation: | 1. Master student in Industrial Education (Electrical Communication Engineering), Faculty of Industrial Education, King Mongkut''s Institute of Technology Ladkrabang, Bangkok 10520, Thailand;2. Department of Electrical Engineering, Faculty of Military Technology, University of Defence Brno, Kounicova 65, 662 10 Brno, Czech Republic;3. Institute of Microelectronics, Faculty of Electrical Engineering and Communications, Brno University of Technology, Technická 10, 616 00 Brno, Czech Republic;4. Department of Engineering Education, Faculty of Industrial Education, King Mongkut''s Institute of Technology Ladkrabang, Bangkok 10520, Thailand;1. Electrical Engineering Department, Motilal Nehru National Institute of Technology, Allahabad, India;2. Department of Electrical and Electronics Engineering, International Institute of Information Technology, Bhubaneswar, India;1. Department of Engineering Education, Faculty of Industrial Education and Technology, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand;2. SIX Research Center, Brno University of Technology, Brno, Czech Republic;3. Department of Microelectronics, Brno University of Technology, Technická 10, Brno, Czech Republic;4. Faculty of Biomedical Engineering, Czech Technical University in Prague, nám. Sítná 3105, Kladno, Czech Republic;1. Dept. of Electronics and Communication Engineering, Delhi Technological University, Delhi, India;2. Dept. of Electronics and Communication Engineering, JSS Academy of Technical Education, Noida, India |
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| Abstract: | In this study, a three-input single-output voltage-mode biquadratic filter employing voltage differencing differential input buffered amplifier (VD-DIBA) is presented. The proposed filter uses two VD-DIBAs and two grounded capacitors without any external resistors, which is well suited for integrated circuit implementation. The circuit provides five standard transfer functions, namely, low pass, high pass, band pass, notch and all pass filters with electronic control of quality factor and pole frequency. Each transfer function can be selected by suitably selecting input signals via digital method. The filter does not require inverting of the input voltage signal. Moreover, the circuit possesses high input and low output impedances and thus it enables simple voltage-mode cascading. The PSPICE simulation and also experimental results are included, verifying the workability of the proposed filter. The given results agree well with the theoretical anticipation. |
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| Keywords: | Voltage-mode VD-DIBA Filter Integrated circuit Analog circuit |
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