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Author: search.filters.author.Kumngern, MontreeSubject: search.filters.subject.current mode

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    Item type:Publication,
    Amplitude controllable current-mode first order allpass filter including minimum component count circuits
    (2015-10-09)
    Chaichana, Amornchai
    ;
    Kumngern, Montree
    ;
    Siripruchyanun, Montree
    ;
    Jaikla, Winai
    This paper presents a current-mode first order allpass filter based on current follower cascaded transconductance (CFCTA). The phase shifted angle and amplitude of output currents can be electronically and independently tuned via the bias current. The proposed circuit uses only one CFCTA and one grounded capacitor and one electronic resistor, which is definitely suitable to further develop into an integrated circuit. It can provide both non-inverting and inverting output currents. Moreover, the circuit possesses low input and high output impedance, providing easy cascading in current-mode circuit. The PSPICE simulation results based on 0.25μm TSMC CMOS parameters are included, verifying the key characteristics of the presented filter. The given results agree well with the theoretical presumptions. The power consumption is about 5.5mW.
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    Electronically tunable versatile current-mode MISO universal filter including minimum component count circuits
    (2014-01-01)
    Chaichana, Amornchai
    ;
    Kumngern, Montree
    ;
    Jaikla, Winai
    An analog second order current-mode filter is described in this paper. The proposed filter uses only a single active building block, namely current following cascaded transconductance amplifier with two grounded capacitors which is attractive for monolithic chip implementation. The circuit has four inputs and single output currents. Five standard functions, namely low-pass, high-pass, band-pass, band-reject and all-pass functions, are given. The natural pole frequency and quality factor can be tuned electronically via the input bias current. The inverting-type input current signal is not required for realization of all-pass function. High output impedance is achieved which is convenient to cascade in current-mode circuit. The PSPICE simulation results are depicted. The given results agree well with the theoretical anticipation. © 2014 IEEE.