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A current-mode four-phase quadrature oscillator using 2 current controlled current conveyor transconductance amplifiers (CCCCTAs) and 2 grounded capacitors is presented. The proposed oscillator can provide 4 sinusoidal output currents with 90° phase difference. The oscillation condition and oscillation frequency can be electronically/independently controlled by adjusting the bias current of the CCCCTA...
A current-mode quadrature oscillator using single current differencing transconductance amplifier (CDTA), 1 resistor and 2 grounded capacitors is presented. The proposed oscillator can provide 2 sinusoidal output currents with 90° phase difference. The oscillation condition and oscillation frequency can be controlled electronically by adjusting the bias current of the CDTA. High output impedances...
This article presents a current-mode universal biquadratic filter (low-pass, high-pass, band-pass functions), based on multiple-output current controlled current conveyor transconductance amplifiers (MO-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...
This article presents a dual-mode (voltage-mode and current-mode) universal biquadratic filter performing completely standard functions: low-pass, high-pass, band-pass, band-reject and all-pass functions, based on plus type dual-output current controlled current conveyor transconductance amplifier (CCCCTA). The features of the circuit are that: the quality factor and natural frequency can be tuned...
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