Dual Output Voltage Differencing Buffered Amplifier Based Active -C Multiphase Sinusoidal Oscillator

Abstract

A multiphase sinusoidal oscillator (MSO) using dual output voltage differencing buffered amplifier (DO-VDBA) is presented in this paper which provides n equally spaced phase sinusoids of equal magnitudes. The proposed MSO topology is realized using the first order all pass network (APN). In the proposed structure the output voltages are made available at low impedance nodes which makes the proposed MSO easy for cascadability. Making the proposed structure a resistorless structure is a major challenge. The main benefits of the structure are easy integration and less power losses. The formulation of frequency and condition of oscillation is derived mathematically. The oscillation frequency can be tuned electronically, is an added advantage of the proposed MSO. The effect of device non-idealities is also discussed in the study. To assess the proposed MSO performance further Monte Carlo analysis was carried out. The workability of the proposed structure is verified through SPICE simulations for a three (n=3) and four (n=4) phases MSO, and the obtained simulated results are in close agreement with the theoretical values. The total harmonic distortion (THD) is found to be quite low.

Performance Evaluation of Weighted Feedback Based UPQC under Various Power Quality Issues

“…For example, depending on the cost function and the model, local minima may occur. Second, when starting far from any local minimum, the optimization process cannot guarantee convergence [29][30][31][32]. Third, certain approaches become inefficient when dealing with vast amounts of data or criteria [33].…”

Electronically Tunable Voltage-Mode Multiphase Sinusoidal Oscillator with Low Output Impedance Nodes Employing VD-DIBAs

“…The multiphase sinusoidal oscillator (MSO) is one important type of oscillator, which is useful for various electronic applications in communication systems, control systems, instruments, power electronics, single-sideband generators [1], etc. The MSO is designed by first-order circuits, such as an all-pass filter [2][3][4][5][6], a high-pass filter [7][8], and a low-pass filter [9][10][11][12][13][14][15][16][17][18][19]. To achieve the same magnitude and phase difference of each output sinusoidal waveform, the MSO should be designed from the same sub-circuit without an additional amplifier.…”

“…In the literature, numerous types of multiphase sinusoidal oscillators employing active building blocks have been proposed [2-5, 7-8, 10-19]. The proposed multiphase sinusoidal oscillators in [2][3][4][5] are based on the first-order all-pass (AP) filter, the high-pass (HP) filter [7][8], and the low-pass (LP) filter [10][11][12][13][14][15][16][17][18][19]. Each phase of the proposed sinusoidal oscillators in [3,[7][8]13] requires two active elements.…”

“…The frequency of the sinusoidal waveform obtained from the proposed MSOs in [5,[10][11][12][15][16][17] is not electronically controllable. An additional amplifier is required in [2,4,11,15]. The performance of the MSO proposed in [2-4, 7-8, 14-16, 18-19] is only validated via simulation.…”

Development of a Non-Iterative Macromodeling Technique by Data Integration and Least Square Method

“…In some cases, the complexity is due to the electrical size of the structure leading to an unreasonable number of unknowns. Especially with increasing frequency, fully detailed analysis has become the main requirement for all stateof-the-art circuit design and simulations [4,5]. Furthermore, simulators face trouble in simulating the structures in the presence of nonlinear components due to mixed frequency/time problems as well as CPU inefficiency [6,7].…”