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Author: search.filters.author.Phatsornsiri, PunnavichSubject: 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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    0.5-V fully differential allpass section
    (2017-01-18)
    Phatsornsiri, Punnavich
    ;
    Kumngern, Montree
    ;
    Khateb, Fabian
    This paper presents a new first-order allpass filter using bulk-driven transconductor which is suitable for biological signal processing applications. The proposed filter employs one transconductor, one resistor and two capacitors. The bulk-driven MOS transistor technique is used to provide 0.5 V supply voltage operation. The workability of the proposed topology is expressed through PSPICE simulators using TSMC 0.18 μm n-well CMOS process. Simulation results show that the circuit consumes the power of 11.7 μW and has total harmonic distortion (THD) of 1% for input signal of 30 mV<inf>P-P</inf>.