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Author: search.filters.author.Siripongdee, SurapongSubject: search.filters.subject.CCCCTA

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    Electronically controllable first-order multifuntion filter with using single active building block
    (2018-06-08)
    Chinpark, Kobkiat
    ;
    Jaikla, Winai
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    Siripongdee, Surapong
    ;
    Suwanjan, Peerawut
    In this paper, a new voltage-mode first-order multifunction filter using the modified current controlled current conveyor transconductance amplifier (M-CCCCTA) is presented. The proposed filter has two input-voltage nodes with single output voltage node. It can realize three first-order filtering output responses, low-pas filter (LPF), high-pass filter (HPF) and all-pass filter (APF). The natural frequency is electronically tuned. For all-pass filter, the phase shift is electronically varied from 0 to 180 degree which is conveniently controlled by microprocessor or microcontroller. Also, the matching condition of the parameter used to tune the phase response is not required. The proposed first-order filter employs single grounded capacitor, single grounded resistor, and single M-CCCCTA. The simulation results from PSpice program are included to confirm workability of the proposed filter.
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    MISO current-mode biquad filter with independent control of pole frequency and quality factor
    (2012-09-01)
    Jaikla, Winai
    ;
    Siripongdee, Surapong
    ;
    Suwanjan, Peerawut
    This article presents a three-inputs single-output biquadratic filter performing completely standard functions: low-pass, high-pass, band-pass, band-reject and allpass functions, based on current controlled current conveyor transconductance amplifier (CCCCTA). The quality factor and pole frequency can be electronically/independently tuned via the input bias current. The proposed circuit uses 2 CCCCTAs and 2 grounded capacitors without any external resistors which is very suitable to further develop into an integrated circuit. The filter does not require double input current signal. Each function response can be selected by suitably selecting input signals with digital method. Moreover, the circuit possesses high output impedance which would be an ideal choice for currentmode cascading. The PSPICE simulation results are included to verify the workability of the proposed filter. The given results agree well with the theoretical anticipation.
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    Current controlled current-mode universal filter using CCCCTAs
    (2011-09-22)
    Siripongdee, Surapong
    ;
    Kwawsibsam, Adisorn
    ;
    Jaikla, Winai
    This article presents a current-mode universal filter based-on parallel RLC circuit using CCCCTAs as active element. The pole frequency and quality factor can be electronically/ orthogonally controlled via input bias currents. The circuit description consists of merely 2 CCCCTAs and 2 grounded capacitors. Without any external resistors, the proposed circuit is then suitable for IC architecture. The proposed circuit due to high output impedances enable easy cascading in current-mode. The PSPICE simulation results are depicted, and the given results agree well with the theoretical anticipation. © 2011 IEEE.