Lerkvaranyu, Somkiat

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Lerkvaranyu, Somkiat
Alternative Name
Lerkvaranyu, S.
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Email
somkiat.le@kmitl.ac.th

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    Extremely Low-Power Fifth-Order Low-Pass Butterworth Filter
    (2021-04-01)
    Aupithak, Nattharinee
    ;
    Torteanchai, Usa
    ;
    Burapattanasiri, Bancha
    ;
    Lerkvaranyu, Somkiat
    ;
    Khateb, Fabian
    A fifth-order Butterworth low-pass filter using multiple-input operational transconductance amplifiers (OTAs) is proposed in this paper. It is expressed that the number of OTAs that used for realizing fifth-order low-pass filter can be reduced using multiple-input OTA and results to decrease the power consumption and the active area. N-input OTA can be obtained using multiple-input bulk-driven quasi-floating gate technique. Subthreshold technique is used to achieve extremely low power consumption which can be applied to biomedical systems. The proposed topology is simulated using 0.18 standard CMOS process. Simulation results show that the proposed filter has a bandwidth located within 250 Hz, a power consumption of 41 nW and a dynamic range of 61 dB.
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    Mixed-Mode Universal Filter Using Differential Difference Transconductance Amplifiers
    (2022-01-01)
    Suksaibul, Pichai
    ;
    Torteanchai, Usa
    ;
    Kumngern, Montree
    ;
    Jongchanachavawat, Wirote
    ;
    Burapattanasiri, Bancha
    This paper presents a new mixed-mode universal biquad filter based on differential difference transconductance amplifiers (DDTAs). This work will be expressed that many filtering functions with electronic control of the natural frequency can be obtained using DDTA-based circuit. The topology provides voltage-mode (VM), current-mode (CM), transimpedance-mode (TIM), transadmittance-mode (TAM) transfer functions into single topology and each transfer function offers five standard filtering functions. The performance of the proposed topology is carried out using PSPICE simulators based on 0.18 μm CMOS technology from TSMC. The simulation result shows that it can confirm the proposed topology.
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    Electronically Tunable Differential Difference Current Conveyor Using OTAs
    (2021-04-01)
    Sukhawit, Chuthitep
    ;
    Burapattanasiri, Bancha
    ;
    Torteanchai, Usa
    ;
    Lerkvaranyu, Somkiat
    ;
    Knobnob, Boonying
    This paper presents a new electronically tunable differential difference current conveyor (DDCC) using operational transconductance amplifiers (OTAs). Unlike conventional DDCC, the proposed DDCC offers current gain between z- and x-terminal that can be controlled electronically by bias currents. The DDCC-based OTA can be investigated both simulation and experiment tests. The proposed DDCC is used to implement a quadrature oscillator to confirm workability.