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Author: search.filters.author.Nonthaputha, ThanatSubject: search.filters.subject.current-mode circuit

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    EX-CCCII with Controlled Current Gain and Its Applications
    (2026-04-01)
    Tooprakai, Siraphop
    ;
    Khateb, Fabian
    ;
    Kulej, Tomasz
    ;
    Nonthaputha, Thanat
    ;
    Vavra, Jiri
    This paper presents a novel extra-X second-generation current-controlled conveyor (EX-CCCII) with controllable current gain. Unlike the conventional EX-CCCII, the proposed EX-CCCII provides a controllable current gain between the (Formula presented.) - and (Formula presented.) -terminals. To demonstrate the advantages of the EX-CCCII with the controllable current gain, the proposed EX-CCCII is employed to realize a universal current-mode filter and a three-phase current-mode oscillator. The universal filter can realize five standard filtering responses (low-pass, high-pass, band-pass, band-stop, and all-pass) using the same topology. The current gains of these filters can be controlled through the current gain of the EX-CCCII, while the natural frequency of the universal filter can be electronically tuned via the intrinsic resistance at the x-terminal. When the proposed EX-CCCII is used to implement the three-phase oscillator, the condition of oscillation can be adjusted through the current gain of the EX-CCCII, whereas the oscillation frequency can be tuned using the parasitic resistance of the x-terminals. The proposed EX-CCCII and its applications were verified through SPICE simulations using the transistor model parameters NR100N (NPN) and PR100N (PNP) of the bipolar array ALA400-CBIC-R from AT&T to confirm the functionality and feasibility of the proposed topologies. Furthermore, experimental verification of the EX-CCCII and its integration into a three-phase oscillator further substantiates the proposed concept and demonstrates its practical viability.
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    Current-mode universal filter using FDCCII
    (2015-01-05)
    Nonthaputha, Thanat
    ;
    Kumngern, Montree
    This paper presents a new current-mode universal filter with multiple-input multiple-output employing only one fully differential current conveyor, two grounded capacitors and two grounded resistors. The proposed filter can simultaneously realize of low-pass, band-pass, high-pass, band-stop and all-pass current responses into one single topology and absent passive component-matching conditions. The natural frequency and the quality factor of all filters can be controlled orthogonally by setting the value of passive components. The circuit also offers low active and passive sensitivities. The workability of the proposed circuit is confirmed by PSPICE simulation results.
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