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Subject: search.filters.subject.Circuits

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    Single-input and three-output current-mode biquadratic filters using multiple-output OMAs
    (2002-01-01)
    Tangsrirat, W.
    ;
    Unhavanich, S.
    ;
    Dumawipata, T.
    ;
    Surakampontorn, W.
    A novel circuit configuration for the realization of the single-input and three-output (SITO) current-mode biquadratic filters employing only three multiple-output operational mirrored amplifiers (OMAs) is presented. The proposed circuit can simultaneously realize lowpass, bandpass and highpass filter functions at three high-impedance outputs without changing the circuit configuration and elements. Moreover, the resultant current-mode filter provides low passive and active sensitivities, uses of only grounded passive elements and can be orthogonal tuned of the parameters at and Q-factor.
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    Multiphase sinusoidal oscillators using translinear current conveyors and only grounded passive components
    (2001-01-01)
    Loescharataramdee, C.
    ;
    Kiranon, W.
    ;
    Sangpisit, W.
    ;
    Yadum, W.
    A generalized multiphase sinusoidal oscillator is presented. The circuit realization uses the translinear bipolar second generation current-controlled conveyors to generate arbitrary n current signals equally spaced in phase. The proposed circuit consists of n multi-output current controlled conveyors and a current amplifier connected in cascade. The only passive component employed in each of the n conveyors is one grounded capacitor. The oscillation condition and oscillation frequency are independently controlled. The former depends only on the number of the phase signals of the oscillator. The dependency of the latter on the input resistance of the input ports of the current conveyors makes electronic tunability possible using the bias currents. The circuit also enjoys having simple structure and very low component count and it is highly suitable for monolithic implementation.