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This article presents a voltage-mode universal biquadratic filter (low-pass, high-pass, band-pass functions), based on current controlled current conveyor transconductance amplifiers (CCCCTAs). The features of the circuit are that: the quality factor and pole frequency can be tuned orthogonally via the input bias currents: the circuit description is very simple, consisting of merely 3 CCCCTAs and...
In this article, a novel circuit, which can function both as quadrature oscillator and as universal biquad filter (lowpass, highpass, bandpass) are introduced. Working as quadrature oscillator, the oscillation condition and oscillation frequency can be adjusted independently by the input bias current. Functioning as universal biquad filter, the quality factor and cutoff frequency can be tuned orthogonally...
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