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Author: search.filters.author.Buakaew, SeangraweeSubject: search.filters.subject.quadrature oscillator

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    Three-Phase Oscillator with Cascade Ability Using Voltage Current Conveyor
    (2024-01-01)
    Buakaew, Seangrawee
    ;
    Narksarp, Wipavan
    ;
    Choeysombat, Kamonthip
    ;
    Kanjanawiwin, Juthamas
    ;
    Atiwongsangthong, Narin
    This paper presents a new circuit configuration employing voltage current conveyors (VCII) in conjunction with a minimal number of passive elements to achieve a voltage mode sinusoidal oscillator with a 3 -phase differential output. The proposed circuit features a straightforward architecture, with all passive elements connected to low-impedance nodes. Consisting solely of identical VCIIs without multiple outputs, the circuit facilitates the cascading of the 3 -phase outputs without requiring supplementary buffering. Simulation results obtained through PSPICE, along with experimental validation using commercial ICs, are provided to substantiate the efficacy of the proposed circuit.
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    Adjustable Quadrature Shadow Sinusoidal Oscillator
    (2022-01-01)
    Buakaew, Seangrawee
    ;
    Atiwongsangthong, Narin
    This article presents a shadow oscillator with quadrature-phase outputs. The proposed circuit employs the voltage differential transconductance amplifier (VDTA) and two grounded passive elements. The frequency of the oscillation, as well as the condition of oscillation, are accomplished through the tunning of the gains of the external amplifiers. Therefore, frequency adjustability can be performed without the effect on the biquad cell which is the main feature of the shadow oscillators. The results from the PSpice simulations employing the CMOS circuit level are included to verify the proposed quadrature shadow oscillator configurations.