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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 3rd order current-mode quadrature oscillator using current controlled current conveyor transconductance amplifiers (CCCCTAs) as active elements. The proposed circuit is realized from a non-inverting lossless integrator and an inverting second-order lowpass filter. The oscillation condition and oscillation frequency can be electronically/orthogonally controlled via input bias...
This paper presents a new time-domain design procedure for CMOS three stage amplifiers with nested Miller compensation. The optimal design issues of power dissipation are considered to achieve the lowest power consumption while satisfying the required design specifications such as the DC gain, settling time, and noise budget. These parameters are critical for switched-capacitor applications. HSPICE...
This article presents a current-mode quadrature oscillator using current controlled current feedback amplifiers (CC-CFAs) as active elements. The proposed circuit is realized from a lossy integrator and a lossy differentiator. The oscillation condition and oscillation frequency can be orthogonally controlled via input bias currents. The circuit description is very simple, consisting of merely 2 CC-CFAs,...
The use of Miller's theorem in the determination of the high-frequency cutoff frequency of transistor amplifiers was recently challenged by a paper published in this transactions. Unfortunately, that paper provided no simulation or experimental results to bring credence to the challenge or to validate the alternate method of determination proposed. This paper provides SPICE simulation results that...
The realization of a resistorless current-mode first order allpass filter using current differencing transconductance amplifiers (CDTAs) as active components is presented. The proposed filter employs only two CDTAs and one virtually grounded capacitor, which its phase shift can be electronically adjusted by varying the bias current of the CDTA. The circuit also exhibits high-output impedance, which...
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