Current-mode high-Q bandpass filter and mixed-mode quadrature oscillator using ZC-CFTAs and grounded capacitors

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dc.contributor.authorTangsrirat, Worapong
dc.contributor.authorMongkolwai, Pratya
dc.contributor.authorPukkalanun, Tattaya
dc.date.accessioned2026-08-06T10:04:36Z
dc.date.available2026-08-06T10:04:36Z
dc.date.issued2012-08-01
dc.description.abstractThis paper presents the realization of the current-mode bandpass filter and mixed-mode quadrature oscillator both from the same circuit configuration. The proposed circuit is in the resistor-less structure, which contains only four z-copy current follower transconductance amplifiers (ZC-CFTAs) as active components together with two grounded capacitors as passive components. As the first configuration, the current-mode BP filter with high quality factor (Q) is proposed. The center frequency (wo) and the Q of the circuit are orthogonal adjustable via the gm-value of the ZC-CFTA. From the same topology, the mixed-mode quadrature oscillator can easily be realized that is capable of generating two explicit quadrature current outputs and two quadrature voltage outputs, simultaneously. Moreover, the realized oscillator also provides the advantage of orthogonal electronic control of the oscillation condition and oscillation frequency, which makes it suitable as variable frequency oscillator. PSPICE simulation results using bipolar ZC-CFTA have been given to verify the workability of the two proposed circuits.
dc.identifier.citationIndian Journal of Pure and Applied Physics, 50(8), 600-607, 2012
dc.identifier.issn00195596
dc.identifier.other2-s2.0-84864991393
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/4286
dc.sourceIndian Journal of Pure and Applied Physics
dc.subjectBandpass filter
dc.subjectQuadrature oscillator
dc.subjectZ-Copy Current Follower Transconductance Amplifier
dc.titleCurrent-mode high-Q bandpass filter and mixed-mode quadrature oscillator using ZC-CFTAs and grounded capacitors
dc.typeArticle

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