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Author: search.filters.author.Junnapiya, SomyotSubject: search.filters.subject.operational transconductance amplifier

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    Tunable voltage-mode multifunction biquadratic filter with three inputs single output using three single-ended OTAs and two capacitors
    (2013-05-20)
    Kumngern, Montree
    ;
    Junnapiya, Somyot
    This paper presents a electronically tunable voltagemode universal biquadratic filter with three inputs and one output using three single-ended operational transconductance amplifiers and two capacitors. The proposed filter provides low-pass, band-pass, high-pass, band-stop and all-pass filters by appropriately connecting the input terminals. No component-matching condition is required for realizing these filtering functions. The use of minimum elements makes the filter possible for low power consumption applications. The natural frequency and the quality factor can be set orthogonally by adjusting the circuit components. Also the natural frequency can be electronically tuned via the bias currents of OTAs. The performances of the proposed circuit are simulated with PSPICE to confirm the presented theory. © 2013 IEEE.
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    One-input five-output voltage-mode universal biquadratic filter using single-ended OTAs
    (2012-11-22)
    Kumngern, Montree
    ;
    Junnapiya, Somyot
    This paper presents a new high-input impedance electronically tunable voltage-mode universal filter with one input and five outputs employing eight single-ended operational transconductance amplifiers and two grounded capacitors. The proposed circuit can simultaneously realize voltage-mode low-pass, band-pass, high-pass, band-stop and all-pass filter without inverting-type input signals and component-matching conditions requirements. The natural frequency and the quality factor can be orthogonally controlled. The natural frequency can also be electronically tuned. The active and passive sensitivities of the circuit are low. Simulation results are provided to demonstrate the theoretical analysis. © 2012 IEEE.
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    Voltage-mode three inputs five outputs universal biquad employing OTAs
    (2011-12-01)
    Kumnern, Montree
    ;
    Junnapiya, Somyot
    This paper presents a new realization of electronically tunable voltage-mode universal filter with three-input five-output using operational transconductance amplifiers. The proposed filter circuit offers the following attractive feature: employment of grounded capacitors which is more suitable for integrated circuit implementation, simultaneous realization of all the standard filtering functions; orthogonal control of ω <inf>o</inf> and Q and no requirement of inverting-type input signals which is require no addition circuit. PSPICE simulation results are given to verify the presented theory. © 2011 IEEE.