Single FDCCII-based mixed-mode biquad filter with eight outputs |
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Authors: | Chen-Nong Chun-Ming |
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Affiliation: | aDepartment of Computer and Communication Engineering, Technology and Science Institute of Northern Taiwan, Taipei 112, Taiwan, ROC;bDepartment of Electrical Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan, ROC |
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Abstract: | The transconductance and the transresistance modes might act as the bridge transferring from voltage-mode to current-mode and vice versa, respectively. A novel mixed-mode (including voltage, current, transconductance, and transresistance modes) biquad filter with one input and seven outputs or two inputs and eight outputs is presented. The proposed filter structure only uses a single fully differential current conveyor (FDCCII), three resistors and two grounded capacitors, which are the least components necessary for realizing voltage, current, transresistance modes all five standard filter functions and transconductance-mode band-pass, high-pass filter functions from eight output terminals. Moreover, the new mixed-mode biquad filter still enjoys (i) the employment of two grounded capacitors (attractive for absorbing shunt parasitic capacitance and ideal for IC implementation), (ii) orthogonal control of ω0 and Q (easy for tunability), and (iii) high output impedance of three current outputs (good for cascadability). H-Spice simulation results verify the theoretical analysis. |
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Keywords: | Active filters Fully differential current conveyor (FDCCII) Mixed-mode Universal biquad Transresistance-mode |
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