Realization of Voltage-mode Multifunction Biaquadratic Filter Using Minimum Number of Active Element

2019 International Conference on Smart Materials Applications

Jaikla, Winai^1 ; Siripongdee, Surapong^1 ; Suwanjan, Peerawut^1

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

10520, Thailand^1

关键词: Active building blocks;    Circuit construction;    Current controlled current conveyors;    Matching condition;    P-Spice simulation;    Passive elements;    Second order filters;    Transconductance amplifier;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/559/1/012010/pdf
DOI  :  10.1088/1757-899X/559/1/012010

来源: IOP

【 摘 要 】

The realization of voltage-mode multifunction biquadratic filter has been presented in this research contribution. The proposed circuit contains three input voltage nodes and one output voltage node. The structure of proposed filter is simple consisting of one modified current controlled current conveyor transconductance amplifier (M-CCCCTA) as active building block with one resistor and two capacitors. With electronically controllable property of M-CCCCTA, the parameters, natural frequency (ω0) and quality factor (Q) are electronically controlled by changing the external DC bias currents of the M-CCCCTA. The tuning characteristic of Q is also done without effect the w0. In the same circuit construction, five second order filter responses, all-pass, high-pass (HP), band-reject (BR), low-pass (LP) and band-pass (BP) functions are obtained. The output filter responses are obtained with applying appropriate input voltage to input node without the matching condition of active and passive elements. The performances of the proposed biquadratic filter have been verified through Pspice simulation in TSMC 0.25 μm CMOS technology parameters.