Moonmuang, Pitchayanin

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Preferred name
Moonmuang, Pitchayanin
Alternative Name
Moonmuang, P.
Main Affiliation
Email
pitchayanin.mo@kmitl.ac.th

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    Item type:Publication,
    Single VDTA-Based Tunable Floating Lossy Inductance Simulation Circuits
    (2023-01-01)
    Moonmuang, Pitchayanin
    ;
    Tangsrirat, Worapong
    In this study, two circuit topologies for simulating tunable lossy floating inductors are proposed. In each design, the simulators make use of a single voltage differencing transconductance amplifier (VDTA), and only two passive elements with a grounded capacitor. The proposed active inductance simulators do not need some kind of component matching conditions and cancellation constraints for the desired realization. Besides, the simulated equivalent resistance and inductance values are independently tunable through a single resistor and/or the transconductances of the VDTA. The workability of all the proposed circuits is well accomplished through PSPICE simulations and experimental test results. To ascertain the feasibility of the proposed inductor designs, they are used to construct a fourth-order equal-ripple (3-dB) lowpass filter and an electronically tunable sinusoidal oscillator.
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    Item type:Publication,
    VDTA-based floating/grounded series/parallel R-L and R-C immittance simulators with a single grounded capacitor
    (2023-02-01)
    Moonmuang, Pitchayanin
    ;
    Faseehuddin, Mohammad
    ;
    Pukkalanun, Tattaya
    ;
    Herencsar, Norbert
    ;
    Tangsrirat, Worapong
    Active configurations for simulating floating/grounded series and parallel immittance functions based on voltage differencing transconductance amplifiers (VDTAs) are proposed. The grounded series and parallel immittance simulators presented here require only one VDTA, while the proposed floating ones only need two. Each of the suggested simulators uses a single grounded capacitor. The proposed topologies can imitate R-L and R-C immittances in both series and parallel types. All of the simulated equivalent elements are electronically adjustable through the VDTA's transconductance. Furthermore, no component-matching restrictions are imposed in order to achieve the appropriate immittance function. Applications of the proposed VDTA-based immittance simulators include bandpass filter and quadrature oscillator implementations. The behaviors of the proposed circuits and their applications are evaluated by PSPICE simulations and experimental observations using VDTA implemented with commercially available CA3080 type OTAs.