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Author: search.filters.author.Torteanchai, UsaSubject: search.filters.subject.analog circuit

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    Current-Mode Universal First-Order Analog Filter Using CCCIIs
    (2023-01-01)
    Phatsornsiri, Punnavich
    ;
    Torteanchai, Usa
    ;
    Wongprommoon, Natapong
    ;
    Kumngern, Montree
    ;
    Jongchanachavawat, Wirote
    This paper presents a new current-mode first-order universal analog filter using current-controlled current conveyors (CCCIIs). The proposed circuit can realize first-order sections such as all-pass, low-pass, high-pass filters with both non-inverting and inverting transfer functions into single topology. The pole frequency of these filters can be controlled electronically. The output terminals possess high impedance level which is required for cascading of current-mode circuits. The proposed analog filter is verified using SPICE simulation. The CCCII has been simulated using the 0.18 µm CMOS technology with a supply voltage of 1.8 V. The simulation result can show that it agrees well with theory.
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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.
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    CMOS class AB second generation voltage conveyor
    (2019-09-01)
    Kumngern, Montree
    ;
    Torteanchai, Usa
    ;
    Khateb, Fabian
    This paper presents a class AB second generation voltage conveyor. This device is designed to obtain the current buffer as input stage and is followed by the voltage buffer in monolithic chip. A class AB technique to obtaining high signal swing, high dynamic range, high bandwidth and low power consumption has been used. The proposed circuit is <sup>s</sup>imulated using SPICE simulations with a standard 0.18 μ m CMOS process and with ± 0.9V supply.
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    Sub-Volt Bulk-Driven Transconductance Amplifier and Filter Application
    (2018-07-02)
    Kumngern, Montree
    ;
    Torteanchai, Usa
    ;
    Yutthanaboon, Sathian
    ;
    Khateb, Fabian
    This paper describes a low-voltage and low-power transconductance amplifier and its application to third-order elliptic low-pass filter. The bulk-driven MOS transistor technique is used to provide low supply voltage operation and rail-To-rail input voltage common mode. The performance of the proposed filter is expressed through PSPICE simulators using TSMC 0.18 μm n-well CMOS process. Simulation results show that the filter using proposed circuit consumes 36 μW for power supply of a 0.5 V and has total harmonic distortion 1 % for input signal of 480 mVP-P.
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    A CMOS current-mode multiplier/divider using a current amplifier
    (2013-08-28)
    Kumngern, Montree
    ;
    Torteanchai, Usa
    This paper presents a new realization of current-mode two-quadrant analogue multiplier/divider using only a single current amplifier. CMOS technology is used to realize the proposed circuit. Therefore, it can be implemented by low cost technology. The proposed circuit provides following advantages: low circuit complexity, very suitable for integrated circuit implementation, good temperature stability. PSPICE simulation results using the 0.5 μm CMOS technology from MIETEC are included to confirm the workability of the presented theory. © 2013 IEEE.