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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...
This article introduces a capacitance multiplier employing operational transconductance amplifiers (OTAs). The provided capacitor is a floating element synthesized from a grounded capacitor. Its outstanding feature is that the capacitive value can be widely adjusted by input bias currents of the OTAs and is temperature-insensitive. The circuit construction comprises only four OTAs, three of them are...
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