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Author: search.filters.author.Tangsrirat, WorapongSubject: search.filters.subject.Multiphase sinusoidal oscillator (MSO)

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    Current-mode multiphase sinusoidal oscillator using CDTA-based allpass sections
    (2009-07-01)
    Tangsrirat, Worapong
    ;
    Tanjaroen, Wason
    ;
    Pukkalanun, Tattaya
    In this work, a current tunable current-mode multiphase sinusoidal oscillator (MSO) employing current differencing transconductance amplifier (CDTA)-based first-order allpass sections is presented. The proposed MSO circuit, which uses only two CDTAs and one virtually grounded capacitor for each phase, can generate arbitrary 2 n-phase current-output signals (n = 2, 3, 4, ...) equally spaced in phase, all at high output impedance terminals. The oscillation condition and the oscillation frequency can be controlled electronically and independently by adjusting the bias current of the CDTA. The oscillator has low-sensitivity performance. Simulation results are also given to verify the functionality of the proposed oscillator. © 2008 Elsevier GmbH. All rights reserved.
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    Current-mode multiphase sinusoidal oscillator using current differencing transconductance amplifiers
    (2008-02-01)
    Tangsrirat, Worapong
    ;
    Tanjaroen, Wason
    This paper describes a simple current-controlled current-mode multiphase sinusoidal oscillator based on current differencing transconductance amplifiers (CDTAs) as active components. The proposed oscillator circuit, which employs only one CDTA and one grounded capacitor for each phase, can generate arbitrary n current-output signals (n being even or odd) equally spaced in phase, all at high output impedance terminals. The oscillation condition and the oscillation frequency can be controlled electronically and independently through the bias current of the CDTA. The oscillator has low-component count, low-sensitivity performance, and is highly suitable for monolithic implementation. PSPICE simulation results are given to confirm the operation of the proposed oscillator. © Birkhäuser Boston 2007.