Mixed-mode Multiphase Sinusoidal Oscillators using Differential Voltage Current Conveyor Transconductance Amplifiers and Only Grounded Passives Components

Abstract

This article is about mixed-mode multiphase sinusoidal oscillators that are made up of differential voltage current conveyor transconductance amplifier (DVCCTA) and use all the grounded passive components. The proposed multiphase sinusoidal oscillators provide a single DVCCTA, a single grounded resistor and a capacitor for each phase which is suitable for integrated circuit implementation. In addition, the sinusoidal outputs generate currents and voltages simultaneously. The current signals from the outputs have high impedances, which make it easier to connect them directly to the next circuit or stage. The proposed circuits can generate multiphase sinusoidal signals that are both equally phased and in amplitude. The oscillation can be adjusted simultaneously of the frequency of oscillation by the electronic method. A simulation with the PSPICE program and an experiment with commercially available ICs (AD830, AD844, and LM13700N) demonstrated. The results show the efficiency of the circuit is completely consistent with the theory.

The development of a 10.7-MHz fully balanced current-tunable bandpass filter with Caprio technique

“…Meanwhile, [13] offers improved selectivity and tuning range but may entail greater complexity and cost. Further advances in filter technology and diverse design options for various applications are presented in [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. While [15][16][17][18][19] emphasize enhanced selectivity and bandwidth, they may exhibit sensitivity to temperature and fabrication variations.…”

“…[23] delves into the design of a high-frequency current mode oscillator using the f T integration technique, while [24] unveils a downconverter/AGC IC for digital audio broadcasting based on a Si BJT. Finally, [25] outlines the concept of a High-Q tuned active bandpass filter designed for wireless applications, and [26] presents their work on Mixed-mode Multiphase Sinusoidal Oscillators using Differential Voltage Current Conveyor Transconductance Amplifiers and Only Grounded Passive Components. A review of the relevant literature reveals that the issue of odd-order noise in circuits, caused by limited gain and harmonic distortion, has not been resolved.…”