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Author: search.filters.author.Phatsornsiri, PunnavichSubject: search.filters.subject.current-mode circuit

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    Current-Mode First-Order Versatile Filter Using Translinear Current Conveyors with Controlled Current Gain
    (2023-07-01)
    Kumngern, Montree
    ;
    Jongchanachavawat, Wirote
    ;
    Phatsornsiri, Punnavich
    ;
    Wongprommoon, Natapong
    ;
    Khateb, Fabian
    This paper offers a new current-mode first-order versatile filter employing two translinear current conveyors with controlled current gain and one grounded capacitor. The proposed filter offers the following features: realization of first-order transfer functions of low-pass, high-pass, and all-pass current responses from single topology, availability of non-inverting and inverting transfer functions for all current responses, electronic control of current gain for all current responses, no requirement of component-matching conditions for realizing all current responses, low-input impedance and high-output impedance which are required for current-mode circuits, and electronic control of the pole frequency for all current responses. The proposed first-order versatile filter is used to realize a quadrature sinusoidal oscillator to confirm the advantage of the new topology. To confirm the functionality and workability of new circuits, the proposed circuit and its application are simulated by the SPICE program using transistor model process parameters NR100N (NPN) and PR100N (PNP) of bipolar arrays ALA400-CBIC-R from AT&T.
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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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    Current-mode third-order quadrature oscillator using VDTAs and grounded capacitors
    (2014-01-01)
    Phatsornsiri, Punnavich
    ;
    Lamun, Panit
    ;
    Kumngern, Montree
    ;
    Torteanchai, Usa
    This paper presents a novel electronically tunable current-mode third-order quadrature oscillator based on voltage differencing transconductance amplifier (VDTA). The proposed oscillator is constructed using two VDTAs and three grounded capacitors, which is advantageous for integrated circuit implementation. The circuit provides two current outputs with 90° phase difference from high output impedance terminals. The condition of oscillation and the frequency of oscillation can be electronically tuned by adjusting the bias current of the VDTAs. The sensitivity studies of the circuit have been carried out. PSPICE simulations with 0.35 μm TSMC CMOS process parameters are given to confirm the theoretical analysis. © 2014 IEEE.
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    Four inputs and one output current-mode multifunction filter using CDTAs and all-grounded passive components
    (2012-12-01)
    Kumngern, Montree
    ;
    Phatsornsiri, Punnavich
    ;
    Dejhan, Kobchai
    This paper presents a new current-mode universal filter with four inputs and one output using four current differencing transconductance amplifiers, two grounded capacitors and two grounded resistors. The proposed circuit can realize of low-pass, band-pass, high-pass, band-stop and all-pass current responses, without component-matching conditions and inverting-type input signals requirements. The natural frequency and the quality factor can be set orthogonally and electronically by adjusting the transconductance gains. The filter also offers the features of low input and high output impedances, low active and passive sensitivities and use of only grounded passive components which is ideal for integration point of view. The characteristics of the proposed circuit are simulated using PSPICE simulators to confirm the presented theory. © 2012 IEEE.