Kumngern, Montree

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Kumngern, Montree
Alternative Name
KUMNGERN, Montree
Kumngern, M.
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montree.ku@kmitl.ac.th

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    Current-tunable current-mode all-pass section using DDCC
    (2011-11-03)
    Torteanchai, Usa
    ;
    Kumngern, Montree
    This paper presents a new dual input current-mode first-order all-pass filter employing one differential difference current conveyor, one grounded capacitor and three grounded resistors. The use of grounded passive component makes the circuit suitable for integrated circuit implementation. The output terminals also have high impedance level which enables easy cascading in current-mode operation. The performances of the proposed circuit are simulated with PSPICE to confirm the present theory. © 2011 IEEE.
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    Tunable current-mode quadrature sinusoidal oscillator using CCCFTAs and grounded capacitors
    (2013-05-20)
    Lamun, Panit
    ;
    Kumngern, Montree
    ;
    Torteanchai, Usa
    ;
    Sarsitthithum, Kanok
    This paper presents a new electronically tunable current-mode quadrature sinusoidal oscillator which employs only two current-controlled current follower transconductance amplifiers (CCCFTAs) and two grounded capacitors. The proposed oscillator offers the advantages of independent electronic control for setting the frequency of oscillation and the condition of oscillation, availability of two explicit quadrature current outputs, and low active and passive sensitivities. The outputs of the circuit possess high impedance level which is directly connected to the loads without buffer circuits. The use of grounded capacitors makes the proposed structure highly suitable for integrated circuit implementation. The workability of the proposed structure is verified by PSPICE simulations based on CMOS technology. © 2013 IEEE.
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    Development of Online Supervision System for Industrial Education Pre-Teachers
    (2021-01-01)
    Nonthaputha, Thanat
    ;
    Kumngern, Montree
    ;
    Prasongjan, Piya
    ;
    Torteanchai, Usa
    ;
    Thepnarin, Nawaphol
    In case of coronavirus disease starting in 2019 situations, it is a novel syndrome virus which caused due to the outbreak of highly dangerous. This virus is easily spreadable to human by human. The one of measures for prevention for the human in coronavirus disease situations that the human has been working from home and decreasing face-to-face contacted. This paper presents the development of online supervision system that instead of traditional supervision or onsite face-to-face supervision for industrial education pre-teacher students. It has been designed on web application to convenient for supervisors, mentors and pre-teacher students. They will send about report, assignment and teaching video on the system. Supervisors and mentors can comment, check the report or assignment and approve pre-teacher video teaching on the web daily or weekly. In addition, the proposed system can be decreased the expenses for official travel and a lot of papers when compare with traditional supervision or onsite face-to-face supervision.
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    OTA-Based current square-rooting circuit
    (2017-02-01)
    Kumngern, Montree
    ;
    Torteanchai, Usa
    This paper presents a new simple current-mode square-rooting circuit based on CMOS technology. The proposed circuit consists of only one CMOS operational transconductance amplifier (OTA) with source degeneration and one MOS transistor. The input signal of the circuit is a current and the output is a current proportional to the square root of the input current with high-output impedance level. OTA with source degeneration is used to provide wide input dynamic range. The circuit also exhibits wide bandwidth and good temperature stability. PSPICE simulation results are used to demonstrate the performance of the proposed square-rooting circuit.
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    16-nW 0.5-V low-pass filter for bio-signal applications
    (2025-01-01)
    Phatsornsiri, Punnavich
    ;
    Kumngern, Montree
    ;
    Khateb, Fabian
    ;
    Torteanchai, Usa
    ;
    Wongprommoon, Natapong
    A low-voltage, ultra-low power fully differential low-pass filter for bio-signal applications using multiple-input fully differential operational transconductance amplifiers (OTA) is presented in this article. The multiple inputs of OTA can be achieved using multiple-input dynamic threshold MOS transistor (MIDT-MOST) technique. The novelty of this work is to exhibit the proposed filter using multiple-input OTAs, which leads to a reduction in the number of active OTAs and power consumption. The fourth-order low-pass filter that is cascaded by two second-order filters has been presented. The fourth-order low-pass filter is designed and simulated in the Cadence environment using the 0.18 μm CMOS technology from TSMC at a supply voltage of 0.5 V. The simulation results show that the filter consumes 16 nW of power at a bandwidth of 110 Hz, has a total harmonic distortion (THD) of 1 % at 204.96 mV input amplitude, and provides dynamic range of 69.24 dB. These results indicate that the proposed low-pass filter can be applied to bio-signal processing applications.
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    CMOS programmable P, PI, PD and PID controller circuit using CCTAs
    (2016-09-07)
    Kumngern, Montree
    ;
    Torteanchai, Usa
    This paper presents a new programmable analog electronic proportional-integral-derivative controller circuit using current conveyor transconductance amplifiers as active elements. Unlike previous works, proportional controller, proportional-integral controller, proportional-derivative controller and proportional-integral-derivative controller of proposed structure can be programmed by the bias currents. Also proportional gain, integral time constant and derivative time constant can be electronically controlled. The use of grounded capacitor makes the proposed structure suitable for integrated circuit implementation. The simulation results are used to confirm the workability of the proposed circuit.
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    Quadrature oscillator/universal filter using CCCII with adjustable gain
    (2018-07-02)
    Wareechol, Eakluck
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    Kumngern, Montree
    ;
    Torteanchai, Usa
    This paper presents a quadrature oscillator and universal filter using current controlled current conveyor with adjustable gain as active element. The proposed circuit combines a quadrature oscillator and a universal filter without changing the topology. In the case that the circuit works as a quadrature oscillator, two quadrature voltage outputs and four quadrature current outputs can be obtained. The condition of oscillation and frequency of oscillation can be orthogonally controlled. In the case that the circuit works as a universal filter, low-pass, band-pass, high-stop, band-stop, and all-pass filtering functions can be obtained. The natural frequency and quality factor of filters can be electronically controlled. The proposed topology is simulated using PSPICE simulators to confirm the workability of the new circuit.
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    Four-input four-output current-mode multifunction filter using CDTAs
    (2017-07-02)
    Kumngern, Montree
    ;
    Torteanchai, Usa
    This paper proposed a novel four-input four-output current-mode employing two grounded capacitors and two current differencing transconductance amplifiers (CDTAs) from a universal filter and it has been done. The filter could implement five filtering functions on a single topology. The conditions of passive component-matching and requirements of inverting-type input signal are absent in implementing of these filtering functions. The bias currents could control the natural frequency electronically meanwhile the filter passive and active sensitivities are low. To confirm between both the proposed filter and presented theory, the PSPICE simulation results were taken and carried out.
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    Electronically tunable current-mode universal filter with three-input single-output
    (2010-12-01)
    Kumngern, Montree
    ;
    Torteanchai, Usa
    ;
    Dejhan, Kobchai
    A new current-controlled current-mode universal filter with three inputs and single output employing two translinear current conveyor and two grounded capacitors is presented. The proposed circuit provides low-pass, band-pass, high-pass, bandstop and all-pass current responses from the same configuration at a high impedance terminal. The filter also offers independent electronic control of the natural frequency and quality factor through adjusting the bias current of the translinear current conveyor. The characteristics of the proposed filter are simulated using PSPICE to confirm the theory. © 2010 IEEE.
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    Programmable Universal Filter and Quadrature Oscillator Using Single Output Operational Transconductance Amplifiers
    (2021-01-01)
    Knobnob, Boonying
    ;
    Torteanchai, Usa
    ;
    Kumngern, Montree
    This paper presents a new programmable universal filter and quadrature oscillator based on the single output operational transconductance amplifiers (OTAs). The proposed universal filter and quadrature oscillator can be achieved into single topology by programming analog switches. When the circuit performs as a universal filter, it can realize low-pass, high-pass, band-pass, band-stop and all-pass filters with orthogonal and electronic controls of the natural frequency and quality factor. When the circuit performs as a quadrature oscillator, it provides a three-phase quadrature output signal which the condition and frequency of oscillations can be controlled orthogonally and electronically. The proposed structure can be realized based on the single output OTAs which are easily implemented as both commercially available integrated circuits (ICs) as OTAs and complementary metal-oxide semiconductor (CMOS) OTAs as IC forms. SPICE simulation using standard 0.18 µm CMOS process is used for investigating the performance of the proposed circuit whereas the workability of new circuit is confirmed by LM13600 discrete-component integrated circuits as OTAs.