This paper proposes the simulated and experimental results of a universal filter using the voltage differencing differential difference amplifier (VDDDA). Unlike the previous complementary metal oxide semiconductor (CMOS) structures of VDDDA that is present in the literature, the present one is compact and simple, owing to the employment of the multiple-input metal oxide semiconductor (MOS) transistor technique. The presented filter employs two VDDDAs, one resistor and two grounded capacitors, and it offers low-pass: LP, band-pass: BP, band-reject: BR, high-pass: HP and all-pass: AP responses with a unity passband voltage gain. The proposed universal voltage mode filter has high input impedances and low output impedance. The natural frequency and bandwidth are orthogonally controlled by using separated transconductance without affecting the passband voltage gain. For a BP filter, the root mean square (RMS) of the equivalent output noise is 46 µV, and the third intermodulation distortion (IMD3) is -49.5 dB for an input signal with a peak-to peak of 600 mV, which results in a dynamic range (DR) of 73.2 dB. The filter was designed and simulated in the Cadence environment using a 0.18-µm CMOS process from Taiwan semiconductor manufacturing company (TSMC). In addition, the experimental results were obtained by using the available commercial components LM13700 and AD830. The simulation results are in agreement with the experimental one that confirmed the advantages of the filter.

Department of Electrical Engineering Technical University of Czestochowa 42 201 Czestochowa Poland

Department of Engineering Education Faculty of Industrial Education and Technology King Mongkut's Institute of Technology Ladkrabang Bangkok 10520 Thailand

Department of Microelectronics Brno University of Technology Technická 10 601 90 Brno Czech Republic

Department of Technology Electronic Faculty of Agricultural and Industrial Technology Phetchabun Rajabhat University Phetchabun 67000 Thailand

Faculty of Biomedical Engineering Czech Technical University Prague nám Sítná 3105 Kladno 166 36 Prague Czech Republic

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